The audio input is locked at 44KHz, 16-bit stereo, little-endian signed with buffer size of 4608 bytes (size of one mpeg frame).

Doh! Is that new or has it always been that way? The pcmplay example would have one believe you can select mono/stereo, 11/22/44 KHz, etc... I knew the size of the buffer was locked...

This is a bit disappointing to my plans to get text-to-speech on the player. Sigh.