"The WebWorks API reference indicates that recording from the microphone(s) is possible on one channel. However, the Voice Notes app clearly records on two channels, as can be easily demonstrated by moving the Playbook from left to right while recording one's own voice. Where can I find the WebWorks API for 2-channel audio recording from the Playbook mics? Thanks."
There is a stereo audio extension in the WebGL-Examples repo used by the tunneltilt app
Link to sample Jeff is referring to: https://github.com/blackberry/WebGL-Samples/tree/master/tunneltilt
That might be a good one to merge into the Community-APIs repo.
However it doesn't capture microphone support, which is what the original developer was asking for.