Skip to main content

Generator based tools for working with audio clips.

Project description

The audiogen package provides time domain audio processing tools using Python generators.

This makes some types of audio sample generation and processing pretty easy:

# mix 440 Hz and 445 Hz tones to get 5 Hz beating
beats = audiogen.mixer(
        (audiogen.tone(440), audiogen.tone(445)),
        [(constant(1), constant(1)),]

The actual samples won’t be generated or stored in memory until they’re actually consumed – for instance, when they’re being written out to disk in a wave file:

with open("output.wav", "wb") as f:
    audiogen.sampler.write_wav(f, beats)

Generators’ at-consumption-time computation also allows creating infinitely long output, e.g. to stream to speakers rather than a file on disk:

audiogen.sampler.write_wav(sys.stdout, audiogen.tone(440))

Or just:

You can also use standard generator tools, e.g. the itertools module, to handle audio data:

    beep_silence = itertools.chain(audiogen.beep(), audiogen.silence(0.5))
    infinite_beeps = itertools.cycle(beep_silence)

audiogen.sampler.write_wav(sys.stdout, infinite_beeps)

Soundcard output

The easiest way to play directly to a soundcard output is to use the function, which will play your samples using PyAudio:

import audiogen
import itertools
import sys
    itertools.cycle(itertools.chain(audiogen.beep(), audiogen.silence(0.5)))

Alternatively, you could write your wave data to stdout, e.g.

import audiogen
import itertools
import sys

    itertools.cycle(itertools.chain(audiogen.beep(), audiogen.silence(0.5)))

Then pipe to a command line audio player like Sox:

python | play -t wav -


Install with:

$ pip install audiogen
$ pip install --allow-external PyAudio --allow-unverified PyAudio PyAudio

PyAudio is optional. If it’s not installed, playing audio via the soundcard with will not be available, but generating Wave files – including for piping to an external player, like sox – will work just fine.

Note that to install PyAudio on Mac OS X, you’ll need to first install portaudio:

$ brew install portaudio

See also

Projects built with audiogen:

  • koch, a Koch method Morse code trainer and audio generator

  • afsk, a ham radio APRS/Bell-202 audio frequency shift keying encoder


Get the source and report any bugs on Github:

Version history

  • 0.1.2 - Add band pass and band stop IIR filters; custom beep lengths from @jhobbs

  • 0.1.1 - Fix multiplexing bug causing increase in pitch when using mixer() to produce more than one output channel

  • 0.1.0 - Breaking changes: new arguments to tone(), play() blocks by default

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

audiogen-0.1.2.tar.gz (10.6 kB view hashes)

Uploaded source

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page