OK--My head is spinning a little on this one, so any help from the wiser heads here is much appreciated. I'm using the Foobar2000 SACD plug in to play SACDs (my own) that I've ripped to ISOs using my venerable PS3. I'm outputting audio over the analog 7.1 outputs on the card.
The control panel for my sound card enables me to set a default sampling rate as high as 24/196K. I enter this setting and fire up Foobar. I set foobar to 24 bit and, in SACD settings, I set the PCM sampling rate to 176.4K. The combination works very well.
I heard that wasapi drivers can offer significant gains in audio performance, so I installed them and selected the "Realtek Speakers" event driver (I also tried the "push" driver with the same results). The only sampling rate that works is 24/44.1. I get an "unsupported" error if I try any higher PCM sampling rate in the SACD settings of Foobar. I've tried to do some research on this issue, but the discussions seem to offer conflicting advice. All I can assume is that the sound card only supports 24/44.1, despite the 7.1 outputs. But why does it allow me to set a much higher rate in the sound card control panel, and why does it work for this setting when I set Foobar to use the "DS: Primary sound driver" as opposed to the wasapi driver for the realtek speaker output?
Any help much appreciated,