Andre Michelle

Tonfall – Open Source Audio Framework

October 12th, 2010

Tonfall is an opensource audio framework for Actionscript I have written for the Audio Code Clash Workshop at Flash on the beach to provide an entry point for the attendees on that subject.

Tonfall is not meant to be a fully implemented audio engine but you may learn a lot about signal processing and sequencing in common. It covers most questions I am receiving by email and is not that far away from the audio engine we use in Audiotool.

Features

Holding a list of processors and time information
SignalProcessor for audio generation taking TimeEvents (like notes) into account
Design Pattern to process polyphonic audio generation (e.g. synthesizer)
Static Delay as a template for other effects
Note to frequency mapping
WavFile Encoder
Samples of the Casio RZ1 drumcomputer
AmenBreak sample
Super Mario playing Sequencer
Fully launchable Metronome (Hello World of Audio DSP)
Simple implementation of ToneMatrix

Tonfall is built with FDT 4.0, which I highly recommended. I checked-in the project files as well to let you compile right away.

I also highly recommend to check out Justin Windle's AS3 Particle Node Sequencer, which is based on Tonfall and a very nice implementation of what you can do with it. Thanks again Justin!

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