The following comments are owned by whoever posted them. WineHQ is not responsible for what they say.
RE: I don't get the registry edit thing...
by Nicholas Piegdon on Sunday May 27th 2012, 19:52
Synthesia no longer stores settings in the registry. Instead, it uses a settings.xml file that normally resides in %appdata%\Synthesia on Windows-based systems. Not sure where it goes with Wine.
You can use the SynthesiaConfig.exe included in the distribution to edit the values in that file.
To disable the auto-volume thing now, do the following:
1. Run SynthesiaConfig.exe
2. Click the Advanced button.
3. Find the "Midi.AutoVolume" setting in the list (as of today it's the very first entry and selected by default).
4. Remove the check-mark from the box.
Closing the utility after that should save the changes to settings.xml and the volume should no longer be adjusted on start-up.