Something isn't right. Using Volume set to "internal volume" is not a function of the DAC or the driver. (As Matt said). Internal volume mode should work no matter what.
What happens when you use internal volume and you turn the volume slider all the way down, or in the middle somewhere?
Brian.
After playing with this more this afternoon, I can add this: I did not realize that the volume control *does* work for files that are not DSD, i.e., files in .dsf or .dff.
As I sit here right now, turning the volume down has no effect whatsoever on the volume with these files. I am listening to Miles Davis in .dsf at full volume with the slider set to 0%. The system volume setting on the tray also is at 0%.
Changing now to the same album in 24-192, the application's volume slider works. The system volume setting on the tray remains irrelevant, however, as it has no effect on volume.
With non-JRiver applications, such as YouTube and videos I watch using VLC, the volume settings for the apps and system work as intended. I can control volume either from within the application (such as VLC or the browser) or I can use the master system volume slider in the system tray.
Thank you to all of you for trying to help me with this. I apologize for not having done more experimentation before posting the first time. I think I have narrowed the issue down to just certain sorts of files, as mentioned.
With all other files, sliding the volume bar does turn down the volume.