Originally Posted by Mark_A_W
I'm testing my system, before I ditch the surround pre amp and move to 7.1 with amps directly connected to the soundcard (analogue obviously).
But I've hit a snag.
Moving the main Xonar volume "knob" from 100 to 0 drops the volume by a small amount only - maybe 20%.
Is this just my system? If others movie the xonar volume control does it actually work?
The levels control for the channels work, but not the main xonar volume.
Ok, more progress.
Reinstalling the drivers fixed the volume control not working issue, and the new version of the drivers seem more stable in this regard.
My next issue was that when connected directly to a poweramp, a normal listening level was 3/100, and LOUD was 10/100.
If my PC suddenly set itself to 100% volume....the amplifier and speakers would disappear in a mushroom cloud. The Xonar output is WAY, WAY too hot.
So I'm playing with a simple resistor voltage divider, which will be soldered into the cable connecting the Xonar to the poweramps.
Thanks to from help from an EE mate, the values will be one of:
1k5 series & 47R parallel should provide about 3/100 gain
1k2 series & 47R parallel should provide about 4/100 gain
1k0 series & 56R parallel should provide about 6/100
910R series & 82R parallel should provide about 8/100 gain
910R series & 100R parallel should provide about 10/100 gain
Or maybe 20/100, I dunno yet...
Where the series resistor is to the source, and parallel resistor between signal and ground after it.
A simple experiment with 10/100 shows I'm on the right track. The volume control is far more usable, and full bore is not lethal.