@WITELITE see if this is close.
Volume Increment with Song Reset.gig (127.6 KB)
I’ve got a manual array of the db-to-param conversion, so have only done -6dB to +6dB. You can add further values for < -6dB if you want.
The reset to default on song change uses OSC, so you’ll need to have OSC activated in GP options for this part to work.