Re: RE: Asynchronous OUT endpoint with rate feedback?
Many thank. I can confirm 16.16 rate feedback works with OSX.
btw, you might be interested to know that our project is an open source hardware and open source firmware sound card. (Google for sdr-widget.)
We now have firmware that works in UAC1, 48khz 24 bit stereo capture and playback, as well as UAC2, 48/96/192khz 24 bit stereo capture. We are starting to write the firmware for UAC2 48/96/192khz playback.
UAC2 capture works with Linux (kernel 2.6.35 or later) and OSX Snow Leopard. ASYNC IN with implicit feedback.
UAC1 capture works with all OSes, ASYNC IN with implicit feedback. UAC1 playback ASYNC OUT with rate feedback now works in OSX and Linux. We are going to test with Vista and Win7 soon.
We also have a version of firmware, UAC1 with SYNC playback (no feedback) working in all OSes, including WinXP.
The emphasis of our hardware is capture, as it is designed to be used for amateur radio receiving. The capture performance, in terms of noise floor and blocking dynamic range, is better than any of the commercial sound cards that we have tested (We have not tested against the EMU1212M and the Pro Audio rack mounts yet.)