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        "author": "Christopher H. Casebeer",
        "author_email": "christopher@chc.name",
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            "Intended Audience :: Developers",
            "License :: OSI Approved :: BSD License",
            "Programming Language :: Python :: 2.6",
            "Programming Language :: Python :: 2.7",
            "Topic :: Multimedia :: Sound/Audio"
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        "description": "Audiogen\n========\n\nThe ``audiogen`` package provides time domain audio processing tools\nusing Python generators. \n\nThis makes some types of audio sample generation and processing pretty \neasy::\n\n\t# mix 440 Hz and 445 Hz tones to get 5 Hz beating\n\tbeats = audiogen.mixer(\n\t\t(audiogen.tone(440), audiogen.tone(445)),\n\t\t[(constant(1), constant(1)),]\n\t)\n\nThe actual samples won't be generated or stored in memory until they're \nactually consumed \u2013\u00a0for instance, when they're being written out to disk \nin a wave \\file::\n\n    with open(\"output.wav\", \"wb\") as f:\n        audiogen.sampler.write_wav(f, beats)\n\nGenerators' at-consumption-time computation also allows creating \ninfinitely long output, e.g. to stream to speakers rather than a file on\ndisk::\n\n    audiogen.sampler.write_wav(sys.stdout, audiogen.tone(440))\n\nOr just::\n\n    audiogen.sampler.play(audiogen.tone(440))\n\nYou can also use standard generator tools, e.g. the itertools module, to \nhandle audio data::\n\n\tbeep_silence = itertools.chain(audiogen.beep(), audiogen.silence(0.5))\n\tinfinite_beeps = itertools.cycle(beep_silence)\n    \n    audiogen.sampler.write_wav(sys.stdout, infinite_beeps)\n\t\nSoundcard output\n----------------\n\nThe easiest way to play directly to a soundcard output is to use the \n``audiogen.sampler.play`` function, which will play your samples using \nPyAudio::\n\n    import audiogen\n    import itertools\n    import sys\n    \n    audiogen.sampler.play(\n        itertools.cycle(itertools.chain(audiogen.beep(), audiogen.silence(0.5)))\n    )\n\nAlternatively, you could write your wave data to ``stdout``, e.g. ``myaudio.py``::\n\n    import audiogen\n    import itertools\n    import sys\n    \n    audiogen.sampler.write_wav(\n        sys.stdout,\n        itertools.cycle(itertools.chain(audiogen.beep(), audiogen.silence(0.5)))\n    )\n\nThen pipe to a command line audio player like Sox_::\n\n    python myaudio.py | play -t wav -\n\nInstallation\n------------\n\nInstall with::\n\n    $ pip install audiogen\n    $ pip install --allow-external PyAudio --allow-unverified PyAudio PyAudio\n\nPyAudio is optional. If it's not installed, playing audio via the soundcard with\n``audiogen.sampler.play()`` will not be available, but generating Wave files \u2013 \nincluding for piping to an external player, like ``sox`` \u2013 will work just fine. \n\nNote that to install PyAudio on Mac OS X, you'll need to first install `portaudio`::\n\n    $ brew install portaudio\n\nSee also\n--------\n\nProjects built with ``audiogen``:\n\n- `koch <https://github.com/casebeer/koch>`__, a Koch method Morse code trainer and audio generator\n- `afsk <https://github.com/casebeer/afsk>`__, a ham radio APRS/Bell-202 audio frequency shift keying encoder\n\nContributing\n------------\n\nGet the source and report any bugs on Github:\n\n    https://github.com/casebeer/audiogen\n\nVersion history\n---------------\n\n- 0.1.2 - Add band pass and band stop IIR filters; custom beep lengths from @jhobbs\n- 0.1.1 - Fix multiplexing bug causing increase in pitch when using mixer() to produce\n  more than one output channel\n- 0.1.0 - Breaking changes: new arguments to tone(), play() blocks by default\n\n.. _Sox: http://sox.sourceforge.net/",
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