Thanks darkless for the information.
It seems the TBAAM hardware wise outputs the SPDIF before too much processing. (According to Windows TBAAM is CMedia chipset) I found the datasheets here: http://www.cmedia.com.tw/?q=en/datasheets . So I guess with with ALSA linux direct output (not through mixer) I have a good chance at getting a bit perfect optical out.
Hopefully that's correct.
Ok time to finally get that DAC-AH
Anyone know if the TBAAM (Turtle Beach Audio Advantage Micro) optical out is bit perfect on Linux with ALSA?
Is ALSA/Linux a bit-perfect system to use? (like Kernel Streaming on Windows)
I know the TBAAM optical on Windows is resampled, but what about Linux?