I have two sound cards in my system, a Sound Blaster X-Fi Titanium (PCI-Express) and an Echo Gina 3G, with the optical output from the X-Fi connected to the optical input on the Gina 3G. I'm looking for a way to change the S/PDIF output sample rate on the X-Fi to 48 KHz. I've tried using iecset, but none of the commands change any of the values reported by iecset. Here is the output from iecset:
Mode: consumer Data: audio Rate: 48000 Hz Copyright: protected Emphasis: none Category: PCM coder Original: original Clock: 1000 ppm
Now, here's the weird thing: even though iecset reports the X-Fi S/PDIF rate at 48 KHz, my Echo Gina 3G seems to pick up the stream as 96 KHz instead, ie. the Gina 3G becomes "locked" at 96 KHz upon activating its S/PDIF input and getting its clock from the optical stream.
I noticed in the Windows driver that the X-Fi's internal sampling rate can be adjusted in the driver setting (44.1, 48, 88.2, 96), but the S/PDIF rate can't be adjusted. Instead, the X-Fi's S/PDIF rate seems to be locked to the internal sampling rate.
So, it appears that I may need to adjust the X-Fi's internal sampling rate somehow, but I have no idea how to do this. Does anybody know if this can even be done?
-~Chris