I solved the problem by looking through the MicrophoneManager class.Here
is the ctor for the MicrophoneManager classpublic function
MicrophoneManager() { if(!_creating) { throw new Error("Class cannot be
instantiated. Use getInstance() instead."); return; } micIndex = 0;
}Notice that the MicrophoneManager.micIndex instance var is set to 0. On
my Mac that index references Built-in Microphone.The line in bold is
what fixed the problem. Everything works as expected now. private
function initLCCSCon...