The USB audio speaker volume in Win10


Senior Member
We are developing an USB audio speaker. We found the speaker volume output are different when connect it to HP laptop PC or connect it to my another desktop PC via USB port. Obviously, the USB speaker connected to laptop PC is louder than desktop PC. Same volume level I set. Same Win10 OS situation.
It uses USB UAC protocol. Why does get different speaker volume output ?

Why do I suspect your posting is not going to get a reply? This place does seem to be very active.