The master volume is stored in the registry location:
Code:
...\#eSpeakerTopo\Properties\{7fb7b48f-531d-44a2-bcb3-5ad5a134b3dc}
For example, this REG file sets the master volume to 100%.
Code:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\DeviceClasses\{6994ad04-93ef-11d0-a3cc-00a0c9223196}\##?#HDAUDIO#FUNC_01&VEN_8384&DEV_7680&SUBSYS_83847680&REV_1034#4&31e60982&0&0001#{6994ad04-93ef-11d0-a3cc-00a0c9223196}\#eSpeakerTopo\Properties\{7fb7b48f-531d-44a2-bcb3-5ad5a134b3dc}\20000]
@=hex(ffff1003):00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00
The key name may differ. You need to restart for changes to take effect.
You may not be able to edit or open the `Properties` or `{7fb7b48f-531d-44a2-bcb3-5ad5a134b3dc}` key in `regedit`. Although you have the necessary access permissions, you may receive an error like this:
Code:
[Window Title]
Error Opening Key
[Content]
{7fb7b48f-531d-44a2-bcb3-5ad5a134b3dc} cannot be opened.
An error is preventing this key from being opened.
[OK]
This is because the key name is too long. You will have to temporarily rename the long key name to one character and then rename it back.