The TP6911 from Tenx Technology is an 8-bit micro-controller embedded device tailored to the USB audio and USB Keyboard application. It's able to play two channels PC Audio and record one channel voice through Full-Speed USB bus.
:hw:tp6911_ds-v10.pdf USB Audio with MIC - TP6911 DATA SHEET
:hw:tp6911_ap-01ev10.pdf USB Audio with MIC - TP6911 USB Speaker Application Note
:hw:tp6911_ap-02ev10.pdf USB Audio with MIC - TP6911 USB PHONE Application Note
:hw:tp6911_ap-03ev10.pdf USB Audio with MIC - TP6911 Earphone and Microphone Application Note