Metadata-Version: 2.1
Name: quiet-transfer
Version: 0.2.6
Summary: Tool to send/receive text/binary file over audio via many modulation schemes
Author-email: Matteo Tenca <matteo.tenca@gmail.com>
License: # GNU GENERAL PUBLIC LICENSE
        
        Version 3, 29 June 2007
        
        Copyright (C) 2007 Free Software Foundation, Inc.
        <https://fsf.org/>
        
        Everyone is permitted to copy and distribute verbatim copies of this
        license document, but changing it is not allowed.
        
        ## Preamble
        
        The GNU General Public License is a free, copyleft license for
        software and other kinds of works.
        
        The licenses for most software and other practical works are designed
        to take away your freedom to share and change the works. By contrast,
        the GNU General Public License is intended to guarantee your freedom
        to share and change all versions of a program--to make sure it remains
        free software for all its users. We, the Free Software Foundation, use
        the GNU General Public License for most of our software; it applies
        also to any other work released this way by its authors. You can apply
        it to your programs, too.
        
        When we speak of free software, we are referring to freedom, not
        price. Our General Public Licenses are designed to make sure that you
        have the freedom to distribute copies of free software (and charge for
        them if you wish), that you receive source code or can get it if you
        want it, that you can change the software or use pieces of it in new
        free programs, and that you know you can do these things.
        
        To protect your rights, we need to prevent others from denying you
        these rights or asking you to surrender the rights. Therefore, you
        have certain responsibilities if you distribute copies of the
        software, or if you modify it: responsibilities to respect the freedom
        of others.
        
        For example, if you distribute copies of such a program, whether
        gratis or for a fee, you must pass on to the recipients the same
        freedoms that you received. You must make sure that they, too, receive
        or can get the source code. And you must show them these terms so they
        know their rights.
        
        Developers that use the GNU GPL protect your rights with two steps:
        (1) assert copyright on the software, and (2) offer you this License
        giving you legal permission to copy, distribute and/or modify it.
        
        For the developers' and authors' protection, the GPL clearly explains
        that there is no warranty for this free software. For both users' and
        authors' sake, the GPL requires that modified versions be marked as
        changed, so that their problems will not be attributed erroneously to
        authors of previous versions.
        
        Some devices are designed to deny users access to install or run
        modified versions of the software inside them, although the
        manufacturer can do so. This is fundamentally incompatible with the
        aim of protecting users' freedom to change the software. The
        systematic pattern of such abuse occurs in the area of products for
        individuals to use, which is precisely where it is most unacceptable.
        Therefore, we have designed this version of the GPL to prohibit the
        practice for those products. If such problems arise substantially in
        other domains, we stand ready to extend this provision to those
        domains in future versions of the GPL, as needed to protect the
        freedom of users.
        
        Finally, every program is threatened constantly by software patents.
        States should not allow patents to restrict development and use of
        software on general-purpose computers, but in those that do, we wish
        to avoid the special danger that patents applied to a free program
        could make it effectively proprietary. To prevent this, the GPL
        assures that patents cannot be used to render the program non-free.
        
        The precise terms and conditions for copying, distribution and
        modification follow.
        
        ## TERMS AND CONDITIONS
        
        ### 0. Definitions.
        
        "This License" refers to version 3 of the GNU General Public License.
        
        "Copyright" also means copyright-like laws that apply to other kinds
        of works, such as semiconductor masks.
        
        "The Program" refers to any copyrightable work licensed under this
        License. Each licensee is addressed as "you". "Licensees" and
        "recipients" may be individuals or organizations.
        
        To "modify" a work means to copy from or adapt all or part of the work
        in a fashion requiring copyright permission, other than the making of
        an exact copy. The resulting work is called a "modified version" of
        the earlier work or a work "based on" the earlier work.
        
        A "covered work" means either the unmodified Program or a work based
        on the Program.
        
        To "propagate" a work means to do anything with it that, without
        permission, would make you directly or secondarily liable for
        infringement under applicable copyright law, except executing it on a
        computer or modifying a private copy. Propagation includes copying,
        distribution (with or without modification), making available to the
        public, and in some countries other activities as well.
        
        To "convey" a work means any kind of propagation that enables other
        parties to make or receive copies. Mere interaction with a user
        through a computer network, with no transfer of a copy, is not
        conveying.
        
        An interactive user interface displays "Appropriate Legal Notices" to
        the extent that it includes a convenient and prominently visible
        feature that (1) displays an appropriate copyright notice, and (2)
        tells the user that there is no warranty for the work (except to the
        extent that warranties are provided), that licensees may convey the
        work under this License, and how to view a copy of this License. If
        the interface presents a list of user commands or options, such as a
        menu, a prominent item in the list meets this criterion.
        
        ### 1. Source Code.
        
        The "source code" for a work means the preferred form of the work for
        making modifications to it. "Object code" means any non-source form of
        a work.
        
        A "Standard Interface" means an interface that either is an official
        standard defined by a recognized standards body, or, in the case of
        interfaces specified for a particular programming language, one that
        is widely used among developers working in that language.
        
        The "System Libraries" of an executable work include anything, other
        than the work as a whole, that (a) is included in the normal form of
        packaging a Major Component, but which is not part of that Major
        Component, and (b) serves only to enable use of the work with that
        Major Component, or to implement a Standard Interface for which an
        implementation is available to the public in source code form. A
        "Major Component", in this context, means a major essential component
        (kernel, window system, and so on) of the specific operating system
        (if any) on which the executable work runs, or a compiler used to
        produce the work, or an object code interpreter used to run it.
        
        The "Corresponding Source" for a work in object code form means all
        the source code needed to generate, install, and (for an executable
        work) run the object code and to modify the work, including scripts to
        control those activities. However, it does not include the work's
        System Libraries, or general-purpose tools or generally available free
        programs which are used unmodified in performing those activities but
        which are not part of the work. For example, Corresponding Source
        includes interface definition files associated with source files for
        the work, and the source code for shared libraries and dynamically
        linked subprograms that the work is specifically designed to require,
        such as by intimate data communication or control flow between those
        subprograms and other parts of the work.
        
        The Corresponding Source need not include anything that users can
        regenerate automatically from other parts of the Corresponding Source.
        
        The Corresponding Source for a work in source code form is that same
        work.
        
        ### 2. Basic Permissions.
        
        All rights granted under this License are granted for the term of
        copyright on the Program, and are irrevocable provided the stated
        conditions are met. This License explicitly affirms your unlimited
        permission to run the unmodified Program. The output from running a
        covered work is covered by this License only if the output, given its
        content, constitutes a covered work. This License acknowledges your
        rights of fair use or other equivalent, as provided by copyright law.
        
        You may make, run and propagate covered works that you do not convey,
        without conditions so long as your license otherwise remains in force.
        You may convey covered works to others for the sole purpose of having
        them make modifications exclusively for you, or provide you with
        facilities for running those works, provided that you comply with the
        terms of this License in conveying all material for which you do not
        control copyright. Those thus making or running the covered works for
        you must do so exclusively on your behalf, under your direction and
        control, on terms that prohibit them from making any copies of your
        copyrighted material outside their relationship with you.
        
        Conveying under any other circumstances is permitted solely under the
        conditions stated below. Sublicensing is not allowed; section 10 makes
        it unnecessary.
        
        ### 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
        
        No covered work shall be deemed part of an effective technological
        measure under any applicable law fulfilling obligations under article
        11 of the WIPO copyright treaty adopted on 20 December 1996, or
        similar laws prohibiting or restricting circumvention of such
        measures.
        
        When you convey a covered work, you waive any legal power to forbid
        circumvention of technological measures to the extent such
        circumvention is effected by exercising rights under this License with
        respect to the covered work, and you disclaim any intention to limit
        operation or modification of the work as a means of enforcing, against
        the work's users, your or third parties' legal rights to forbid
        circumvention of technological measures.
        
        ### 4. Conveying Verbatim Copies.
        
        You may convey verbatim copies of the Program's source code as you
        receive it, in any medium, provided that you conspicuously and
        appropriately publish on each copy an appropriate copyright notice;
        keep intact all notices stating that this License and any
        non-permissive terms added in accord with section 7 apply to the code;
        keep intact all notices of the absence of any warranty; and give all
        recipients a copy of this License along with the Program.
        
        You may charge any price or no price for each copy that you convey,
        and you may offer support or warranty protection for a fee.
        
        ### 5. Conveying Modified Source Versions.
        
        You may convey a work based on the Program, or the modifications to
        produce it from the Program, in the form of source code under the
        terms of section 4, provided that you also meet all of these
        conditions:
        
        -   a) The work must carry prominent notices stating that you modified
            it, and giving a relevant date.
        -   b) The work must carry prominent notices stating that it is
            released under this License and any conditions added under
            section 7. This requirement modifies the requirement in section 4
            to "keep intact all notices".
        -   c) You must license the entire work, as a whole, under this
            License to anyone who comes into possession of a copy. This
            License will therefore apply, along with any applicable section 7
            additional terms, to the whole of the work, and all its parts,
            regardless of how they are packaged. This License gives no
            permission to license the work in any other way, but it does not
            invalidate such permission if you have separately received it.
        -   d) If the work has interactive user interfaces, each must display
            Appropriate Legal Notices; however, if the Program has interactive
            interfaces that do not display Appropriate Legal Notices, your
            work need not make them do so.
        
        A compilation of a covered work with other separate and independent
        works, which are not by their nature extensions of the covered work,
        and which are not combined with it such as to form a larger program,
        in or on a volume of a storage or distribution medium, is called an
        "aggregate" if the compilation and its resulting copyright are not
        used to limit the access or legal rights of the compilation's users
        beyond what the individual works permit. Inclusion of a covered work
        in an aggregate does not cause this License to apply to the other
        parts of the aggregate.
        
        ### 6. Conveying Non-Source Forms.
        
        You may convey a covered work in object code form under the terms of
        sections 4 and 5, provided that you also convey the machine-readable
        Corresponding Source under the terms of this License, in one of these
        ways:
        
        -   a) Convey the object code in, or embodied in, a physical product
            (including a physical distribution medium), accompanied by the
            Corresponding Source fixed on a durable physical medium
            customarily used for software interchange.
        -   b) Convey the object code in, or embodied in, a physical product
            (including a physical distribution medium), accompanied by a
            written offer, valid for at least three years and valid for as
            long as you offer spare parts or customer support for that product
            model, to give anyone who possesses the object code either (1) a
            copy of the Corresponding Source for all the software in the
            product that is covered by this License, on a durable physical
            medium customarily used for software interchange, for a price no
            more than your reasonable cost of physically performing this
            conveying of source, or (2) access to copy the Corresponding
            Source from a network server at no charge.
        -   c) Convey individual copies of the object code with a copy of the
            written offer to provide the Corresponding Source. This
            alternative is allowed only occasionally and noncommercially, and
            only if you received the object code with such an offer, in accord
            with subsection 6b.
        -   d) Convey the object code by offering access from a designated
            place (gratis or for a charge), and offer equivalent access to the
            Corresponding Source in the same way through the same place at no
            further charge. You need not require recipients to copy the
            Corresponding Source along with the object code. If the place to
            copy the object code is a network server, the Corresponding Source
            may be on a different server (operated by you or a third party)
            that supports equivalent copying facilities, provided you maintain
            clear directions next to the object code saying where to find the
            Corresponding Source. Regardless of what server hosts the
            Corresponding Source, you remain obligated to ensure that it is
            available for as long as needed to satisfy these requirements.
        -   e) Convey the object code using peer-to-peer transmission,
            provided you inform other peers where the object code and
            Corresponding Source of the work are being offered to the general
            public at no charge under subsection 6d.
        
        A separable portion of the object code, whose source code is excluded
        from the Corresponding Source as a System Library, need not be
        included in conveying the object code work.
        
        A "User Product" is either (1) a "consumer product", which means any
        tangible personal property which is normally used for personal,
        family, or household purposes, or (2) anything designed or sold for
        incorporation into a dwelling. In determining whether a product is a
        consumer product, doubtful cases shall be resolved in favor of
        coverage. For a particular product received by a particular user,
        "normally used" refers to a typical or common use of that class of
        product, regardless of the status of the particular user or of the way
        in which the particular user actually uses, or expects or is expected
        to use, the product. A product is a consumer product regardless of
        whether the product has substantial commercial, industrial or
        non-consumer uses, unless such uses represent the only significant
        mode of use of the product.
        
        "Installation Information" for a User Product means any methods,
        procedures, authorization keys, or other information required to
        install and execute modified versions of a covered work in that User
        Product from a modified version of its Corresponding Source. The
        information must suffice to ensure that the continued functioning of
        the modified object code is in no case prevented or interfered with
        solely because modification has been made.
        
        If you convey an object code work under this section in, or with, or
        specifically for use in, a User Product, and the conveying occurs as
        part of a transaction in which the right of possession and use of the
        User Product is transferred to the recipient in perpetuity or for a
        fixed term (regardless of how the transaction is characterized), the
        Corresponding Source conveyed under this section must be accompanied
        by the Installation Information. But this requirement does not apply
        if neither you nor any third party retains the ability to install
        modified object code on the User Product (for example, the work has
        been installed in ROM).
        
        The requirement to provide Installation Information does not include a
        requirement to continue to provide support service, warranty, or
        updates for a work that has been modified or installed by the
        recipient, or for the User Product in which it has been modified or
        installed. Access to a network may be denied when the modification
        itself materially and adversely affects the operation of the network
        or violates the rules and protocols for communication across the
        network.
        
        Corresponding Source conveyed, and Installation Information provided,
        in accord with this section must be in a format that is publicly
        documented (and with an implementation available to the public in
        source code form), and must require no special password or key for
        unpacking, reading or copying.
        
        ### 7. Additional Terms.
        
        "Additional permissions" are terms that supplement the terms of this
        License by making exceptions from one or more of its conditions.
        Additional permissions that are applicable to the entire Program shall
        be treated as though they were included in this License, to the extent
        that they are valid under applicable law. If additional permissions
        apply only to part of the Program, that part may be used separately
        under those permissions, but the entire Program remains governed by
        this License without regard to the additional permissions.
        
        When you convey a copy of a covered work, you may at your option
        remove any additional permissions from that copy, or from any part of
        it. (Additional permissions may be written to require their own
        removal in certain cases when you modify the work.) You may place
        additional permissions on material, added by you to a covered work,
        for which you have or can give appropriate copyright permission.
        
        Notwithstanding any other provision of this License, for material you
        add to a covered work, you may (if authorized by the copyright holders
        of that material) supplement the terms of this License with terms:
        
        -   a) Disclaiming warranty or limiting liability differently from the
            terms of sections 15 and 16 of this License; or
        -   b) Requiring preservation of specified reasonable legal notices or
            author attributions in that material or in the Appropriate Legal
            Notices displayed by works containing it; or
        -   c) Prohibiting misrepresentation of the origin of that material,
            or requiring that modified versions of such material be marked in
            reasonable ways as different from the original version; or
        -   d) Limiting the use for publicity purposes of names of licensors
            or authors of the material; or
        -   e) Declining to grant rights under trademark law for use of some
            trade names, trademarks, or service marks; or
        -   f) Requiring indemnification of licensors and authors of that
            material by anyone who conveys the material (or modified versions
            of it) with contractual assumptions of liability to the recipient,
            for any liability that these contractual assumptions directly
            impose on those licensors and authors.
        
        All other non-permissive additional terms are considered "further
        restrictions" within the meaning of section 10. If the Program as you
        received it, or any part of it, contains a notice stating that it is
        governed by this License along with a term that is a further
        restriction, you may remove that term. If a license document contains
        a further restriction but permits relicensing or conveying under this
        License, you may add to a covered work material governed by the terms
        of that license document, provided that the further restriction does
        not survive such relicensing or conveying.
        
        If you add terms to a covered work in accord with this section, you
        must place, in the relevant source files, a statement of the
        additional terms that apply to those files, or a notice indicating
        where to find the applicable terms.
        
        Additional terms, permissive or non-permissive, may be stated in the
        form of a separately written license, or stated as exceptions; the
        above requirements apply either way.
        
        ### 8. Termination.
        
        You may not propagate or modify a covered work except as expressly
        provided under this License. Any attempt otherwise to propagate or
        modify it is void, and will automatically terminate your rights under
        this License (including any patent licenses granted under the third
        paragraph of section 11).
        
        However, if you cease all violation of this License, then your license
        from a particular copyright holder is reinstated (a) provisionally,
        unless and until the copyright holder explicitly and finally
        terminates your license, and (b) permanently, if the copyright holder
        fails to notify you of the violation by some reasonable means prior to
        60 days after the cessation.
        
        Moreover, your license from a particular copyright holder is
        reinstated permanently if the copyright holder notifies you of the
        violation by some reasonable means, this is the first time you have
        received notice of violation of this License (for any work) from that
        copyright holder, and you cure the violation prior to 30 days after
        your receipt of the notice.
        
        Termination of your rights under this section does not terminate the
        licenses of parties who have received copies or rights from you under
        this License. If your rights have been terminated and not permanently
        reinstated, you do not qualify to receive new licenses for the same
        material under section 10.
        
        ### 9. Acceptance Not Required for Having Copies.
        
        You are not required to accept this License in order to receive or run
        a copy of the Program. Ancillary propagation of a covered work
        occurring solely as a consequence of using peer-to-peer transmission
        to receive a copy likewise does not require acceptance. However,
        nothing other than this License grants you permission to propagate or
        modify any covered work. These actions infringe copyright if you do
        not accept this License. Therefore, by modifying or propagating a
        covered work, you indicate your acceptance of this License to do so.
        
        ### 10. Automatic Licensing of Downstream Recipients.
        
        Each time you convey a covered work, the recipient automatically
        receives a license from the original licensors, to run, modify and
        propagate that work, subject to this License. You are not responsible
        for enforcing compliance by third parties with this License.
        
        An "entity transaction" is a transaction transferring control of an
        organization, or substantially all assets of one, or subdividing an
        organization, or merging organizations. If propagation of a covered
        work results from an entity transaction, each party to that
        transaction who receives a copy of the work also receives whatever
        licenses to the work the party's predecessor in interest had or could
        give under the previous paragraph, plus a right to possession of the
        Corresponding Source of the work from the predecessor in interest, if
        the predecessor has it or can get it with reasonable efforts.
        
        You may not impose any further restrictions on the exercise of the
        rights granted or affirmed under this License. For example, you may
        not impose a license fee, royalty, or other charge for exercise of
        rights granted under this License, and you may not initiate litigation
        (including a cross-claim or counterclaim in a lawsuit) alleging that
        any patent claim is infringed by making, using, selling, offering for
        sale, or importing the Program or any portion of it.
        
        ### 11. Patents.
        
        A "contributor" is a copyright holder who authorizes use under this
        License of the Program or a work on which the Program is based. The
        work thus licensed is called the contributor's "contributor version".
        
        A contributor's "essential patent claims" are all patent claims owned
        or controlled by the contributor, whether already acquired or
        hereafter acquired, that would be infringed by some manner, permitted
        by this License, of making, using, or selling its contributor version,
        but do not include claims that would be infringed only as a
        consequence of further modification of the contributor version. For
        purposes of this definition, "control" includes the right to grant
        patent sublicenses in a manner consistent with the requirements of
        this License.
        
        Each contributor grants you a non-exclusive, worldwide, royalty-free
        patent license under the contributor's essential patent claims, to
        make, use, sell, offer for sale, import and otherwise run, modify and
        propagate the contents of its contributor version.
        
        In the following three paragraphs, a "patent license" is any express
        agreement or commitment, however denominated, not to enforce a patent
        (such as an express permission to practice a patent or covenant not to
        sue for patent infringement). To "grant" such a patent license to a
        party means to make such an agreement or commitment not to enforce a
        patent against the party.
        
        If you convey a covered work, knowingly relying on a patent license,
        and the Corresponding Source of the work is not available for anyone
        to copy, free of charge and under the terms of this License, through a
        publicly available network server or other readily accessible means,
        then you must either (1) cause the Corresponding Source to be so
        available, or (2) arrange to deprive yourself of the benefit of the
        patent license for this particular work, or (3) arrange, in a manner
        consistent with the requirements of this License, to extend the patent
        license to downstream recipients. "Knowingly relying" means you have
        actual knowledge that, but for the patent license, your conveying the
        covered work in a country, or your recipient's use of the covered work
        in a country, would infringe one or more identifiable patents in that
        country that you have reason to believe are valid.
        
        If, pursuant to or in connection with a single transaction or
        arrangement, you convey, or propagate by procuring conveyance of, a
        covered work, and grant a patent license to some of the parties
        receiving the covered work authorizing them to use, propagate, modify
        or convey a specific copy of the covered work, then the patent license
        you grant is automatically extended to all recipients of the covered
        work and works based on it.
        
        A patent license is "discriminatory" if it does not include within the
        scope of its coverage, prohibits the exercise of, or is conditioned on
        the non-exercise of one or more of the rights that are specifically
        granted under this License. You may not convey a covered work if you
        are a party to an arrangement with a third party that is in the
        business of distributing software, under which you make payment to the
        third party based on the extent of your activity of conveying the
        work, and under which the third party grants, to any of the parties
        who would receive the covered work from you, a discriminatory patent
        license (a) in connection with copies of the covered work conveyed by
        you (or copies made from those copies), or (b) primarily for and in
        connection with specific products or compilations that contain the
        covered work, unless you entered into that arrangement, or that patent
        license was granted, prior to 28 March 2007.
        
        Nothing in this License shall be construed as excluding or limiting
        any implied license or other defenses to infringement that may
        otherwise be available to you under applicable patent law.
        
        ### 12. No Surrender of Others' Freedom.
        
        If conditions are imposed on you (whether by court order, agreement or
        otherwise) that contradict the conditions of this License, they do not
        excuse you from the conditions of this License. If you cannot convey a
        covered work so as to satisfy simultaneously your obligations under
        this License and any other pertinent obligations, then as a
        consequence you may not convey it at all. For example, if you agree to
        terms that obligate you to collect a royalty for further conveying
        from those to whom you convey the Program, the only way you could
        satisfy both those terms and this License would be to refrain entirely
        from conveying the Program.
        
        ### 13. Use with the GNU Affero General Public License.
        
        Notwithstanding any other provision of this License, you have
        permission to link or combine any covered work with a work licensed
        under version 3 of the GNU Affero General Public License into a single
        combined work, and to convey the resulting work. The terms of this
        License will continue to apply to the part which is the covered work,
        but the special requirements of the GNU Affero General Public License,
        section 13, concerning interaction through a network will apply to the
        combination as such.
        
        ### 14. Revised Versions of this License.
        
        The Free Software Foundation may publish revised and/or new versions
        of the GNU General Public License from time to time. Such new versions
        will be similar in spirit to the present version, but may differ in
        detail to address new problems or concerns.
        
        Each version is given a distinguishing version number. If the Program
        specifies that a certain numbered version of the GNU General Public
        License "or any later version" applies to it, you have the option of
        following the terms and conditions either of that numbered version or
        of any later version published by the Free Software Foundation. If the
        Program does not specify a version number of the GNU General Public
        License, you may choose any version ever published by the Free
        Software Foundation.
        
        If the Program specifies that a proxy can decide which future versions
        of the GNU General Public License can be used, that proxy's public
        statement of acceptance of a version permanently authorizes you to
        choose that version for the Program.
        
        Later license versions may give you additional or different
        permissions. However, no additional obligations are imposed on any
        author or copyright holder as a result of your choosing to follow a
        later version.
        
        ### 15. Disclaimer of Warranty.
        
        THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
        APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
        HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
        WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
        LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
        A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
        PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
        DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
        CORRECTION.
        
        ### 16. Limitation of Liability.
        
        IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
        WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
        CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
        INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
        ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
        NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
        LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
        TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
        PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
        
        ### 17. Interpretation of Sections 15 and 16.
        
        If the disclaimer of warranty and limitation of liability provided
        above cannot be given local legal effect according to their terms,
        reviewing courts shall apply local law that most closely approximates
        an absolute waiver of all civil liability in connection with the
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        ## Exceptions
        
        ### jansson
        
        This project is licensed under the MIT license, except where otherwise noted.
        The full text of the MIT license is included below.
        
        #### MIT License
        
        Copyright (c) 2009-2024 Petri Lehtinen <petri@digip.org>
        
        Permission is hereby granted, free of charge, to any person obtaining a copy
        of this software and associated documentation files (the "Software"), to deal
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        ### portaudio
        
        PortAudio Portable Real-Time Audio Library
        PortAudio API Header File
        Latest version available at: http://www.portaudio.com
        
        Copyright (c) 1999-2006 Ross Bencina and Phil Burk
        
        Permission is hereby granted, free of charge, to any person obtaining
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        The text above constitutes the entire PortAudio license; however,
        the PortAudio community also makes the following non-binding requests:
        
        Any person wishing to distribute modifications to the Software is
        requested to send the modifications to the original developer so that
        they can be incorporated into the canonical version. It is also
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        ### quiet library
        
        #### BSD 3-Clause "New" or "Revised" License
        
        Copyright (c) 2016, Brian Armstrong
        All rights reserved.
        
        Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
        
        1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
        
        2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
        
        3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
        
        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        
        ### quiet-dsp library
        
        #### MIT License
        
        Copyright (c) 2007 - 2016 Joseph Gaeddert
        
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        THE SOFTWARE.
        
        
        ### libfec
        
        #### GNU Lesser General Public License 2.1
        
        This package is copyright 2006 by Phil Karn, KA9Q.
        
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        Yoyodyne, Inc., hereby disclaims all copyright interest in the
        library `Frob' (a library for tweaking knobs) written by James Random Hacker.
        
        <signature of Ty Coon>, 1 April 1990
        Ty Coon, President of Vice
        
        That's all there is to it!
        
        
        
Project-URL: homepage, https://github.com/matteotenca/quiet-transfer
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Information Technology
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: System :: Networking
Classifier: Topic :: Communications
Classifier: License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
Requires-Python: >=3.8
Description-Content-Type: text/markdown
License-File: LICENSE.md
Requires-Dist: cffi >=1.12.0
Requires-Dist: pyaudio
Requires-Dist: soundfile

# quiet-transfer

---
![PyPI - Status](https://img.shields.io/pypi/status/quiet-transfer)
![PyPI - License](https://img.shields.io/pypi/l/quiet-transfer?color=blue)
![PyPI - Python Version](https://img.shields.io/pypi/pyversions/quiet-transfer)

## Tool to send/receive text/binary file over audio via many modulation schemes

### Installation

`
pip install quiet-transfer
`

#### Dependencies

`cffi>=1.12.0`, `pyaudio`, `soundfile`

## Documentation

`quiet-transfer` can be used as a command line command. It's purpose is to convert data to sound and send it 
to a sound card or to a WAV file, and all the way back.

### Usage
```bash
$> quiet-transfer -h
usage: quiet-transfer [-h] [-V] {send,receive} ...

Command line utility to send/receive files/strings via quiet library.

options:
  -h, --help      show this help message and exit
  -V, --version   print version number.

commands:
  {send,receive}  send or receive data.
    send          modulate data into audio signal.
    receive       demodulate data from audio signal.
```

### Send

```bash
$> quiet-transfer send -h
usage: quiet-transfer send [-h] [-i <inputfile>] [-o <wavoutputfile>] [-p <protocol>] [-f]

Command line utility to send/receive files/strings via quiet library.

options:
  -h, --help            show this help message and exit
  -i <inputfile>, --input <inputfile>
                        input file (use '-' for stdin).
  -o <wavoutputfile>, --output-wav <wavoutputfile>
                        write audio to this wav file.
  -p <protocol>, --protocol <protocol>
                        protocol
  -f, --file-transfer   enable file transfer mode.
```

 - `<inputfile>` can be the name of a file to read data from or `-` (default) if you want to read data from `stdin`.
 - `<wavoutputfile>` is the optional name of a WAV file to write audio data to. If not present, the audio data will be 
written to the current default output audio device
 - `<protocol>` can be one of:
   - audible
   - audible-7k-channel-0
   - audible-7k-channel-1
   - cable-64k
   - ultrasonic
   - ultrasonic-3600
   - ultrasonic-whisper
 - the `--file-transfer` flag enables the following behaviour:
   1) If `<inputfile>` is missing or is `-`, the flag is ignored.
   2) Otherwise, the `<inputfile>` is read in memory all at once and its CRC32 is calculated.
   2) The file size and the CRC32 are put in a JSON header which is encoded in audio and sent to audio/written to the WAV file.
   3) Some information messages are written to `stderr`
  
 ### Receive

```bash
$> quiet-transfer receive -h
usage: quiet-transfer receive [-h] [-o <outputfile>] [-w] [-d <dumpfile>] [-p <protocol>] [-i <wavinputfile>] [-f]

Command line utility to send/receive files/strings via quiet library.

options:
  -h, --help            show this help message and exit
  -o <outputfile>, --output <outputfile>
                        output file (use '-' for stdout).
  -w, --overwrite       overwrite output file if it exists.
  -d <dumpfile>, --dump <dumpfile>
                        dump received audio to this wav file.
  -p <protocol>, --protocol <protocol>
                        protocol
  -i <wavinputfile>, --input-wav <wavinputfile>
                        WAV file to read from.
  -f, --file-transfer   enable file transfer mode.
```
- `<outputfile>` can be the name of a file to write data to or `-` (default) if you want to write data to `stdout`.
- `--overwrite` must be specified if `<outputfile>` already exists.
- `<protocol>` can be one of:
   - audible
   - audible-7k-channel-0
   - audible-7k-channel-1
   - cable-64k
   - ultrasonic
   - ultrasonic-3600
   - ultrasonic-whisper
- `<dumpfile>` is the optional name of a WAV file. All the audio data read from the soundcard 
or from a input WAV file is written to this file too.
- `<wavinputfile>` is the optional name of a WAV file to analyze. Usually this file is generated using the `send --output-wav` option.
- `--file-transfer` enables parsing of the JSON header generated while sending a file in file transfer mode. It is used to compare the remote file's size and CRC32 with the received file's ones.

### See also

fm-transfer: (https://github.com/matteotenca/fm-transfer)  
gg-transfer: (https://github.com/matteotenca/gg-transfer)
