Hi Nod5, tried your second script right out of the box and worked first time! thanks heaps.

I checked the reg settings, my hive has the following:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Volume Control\Logitech USB Headset
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Volume Control\Realtek HD Audio output
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Volume Control\Options

but guessing the Options key is ignored.

Thanks for your help!

edit whoops, didn't see

if A_LoopRegName = Options                 ;ignore subkey "Options" in the code

. makes sense now