# Io Reference

Audio / PortAudio / AudioMixer

|  | A minimal audio mixer.
|  | appendSource(aSource) Adds aSource to sources list. Returns self. isRunning Returns true if the mixer is running, false otherwise.. process(sampleCount) Internal method used for processing a chunk of the input sources. Returns self. processedSamples Returns the number of processed samples. removeSource(aSource) Removes aSource to sources list. Returns self. start Start the mixer loop processing 1/64th of a second chunks by calling process(22050) in a loop. Will not return until stop is called. Returns self. stop Stops the mixer if it is running. streamDestination The output stream object.