Registery keys

Click on Start->Programs->Accessories,then select Entetainment and click on the type of media that is listed,double-click and open
If you have a Sound card that has special feature then you will select the controls of that card from the Programs and open it to make changes to the sound system

Without looking exactly where they are:

why don't you get a registry snapshot program.

Do a snapshot of the registry while its active. Then mute it and do another registry snapshot.

Amongst the differences is probably what your looking for.

I tested it using Regshot 1.53 and a comparison between using and muting all volume and the result was about 28 differences.

Unfortunately there seems to be plenty of hexcode amongst the mess so it is most likely that any of the code I give you is going to be vastly different depending on how the OS identifies your sound card (Hex identified in the output).
cheers,

btw i was using win2k pro.

hope this helps,
jb.

There is no specific registry key for the mixer settings. While some mixers may use the registry, others use INI files, and point to the data locations in the registry.

On my W98 box with an Aureal SQ2500 sound card, the registry points to an INI file that stores the mixer settings.
The key I looked at was in local machine/software.
The INI file has a specific "Aureal" name.

You will need to identify the specific file for each different soundcard and mixer software combination.