At the moment the system is mute, so no system sounds at all (monitor volume 100%, the "expected" bad result was being able to hear something). I'll even consider a reinstall, albeit that's hard without a working CD drive.
The setting below is the only string which matched the search string "VOL=".
[ICHAMPMIX01]
VERSIONNUMBER=3.1.8
PRODUCTINFO=SoundMax Integrated Digital Wave Audio
MCDDRIVER=AMPMXMCD
VSDDRIVER=AUDIOIF
PDDNAME=ADISND1$
MCDTABLE=MDM
RESOURCENAME=ICHAmpMixer01
DEVICEFLAG=2
DEVICETYPE=9
SHARETYPE=3
RESOURCEUNITS=2
RESOURCECLASSES=2,1,1
VALIDCOMBINATIONS=1,2,2,1
CONNECTORS=5,4,,0,9,,0,8,,0,10,,0,7,,0
PARMSTRING=BALANCE=50,VOL=100,INPUT=MIC,GAIN=50,OUTPUT=SPEAKER