[LAU] USB chip audio with compression?

[Gregoire Banderet]

Hello,

We are at the design phase of a new embedded product based on a PowerPC
and Linux.
The device should have an audio output and an audio input, if possible
with a HW compression (MP3) and if possible with an USB interface.

Is there an audio chip with these spec supported (with a working driver)
by Linux?

Thanks for your help,
Greg