TSP FN Switch maximizes audio when set to 'Unchanged'

[Stevearino64]

TrimUI Smart Pro w/firmware 1.0.4 (also happens w/1.1.0 and 1.1.1).

I searched for this issue before posting but did not find a match. My apologies if I missed it.

I did a fresh install (reformat) of v6.6.0 this morning, and changed the FN Switch settings to Volume = Unchanged, and Disables LED = On.

If I turn on the FN switch after launching a game, it operates as expected - the volume is unchanged and the LEDs turn off.

ISSUE: When I turn on the FN switch before launching a game, the volume goes to maximum when the game starts and the LEDS turn off.

If I then turn off the FN switch with the game still running, the volume returns to the previous level (what ever I had it set to) and the LEDS turn on. After that, with the same game still running, the FN switch seems to function as expected when turned on or off repeatedly.

I set the FN Switch to Volume = 30% with Disable LED = On, then turn on the FN switch before launching a game, it works as expected. I also tried 20% and it worked as expected. Volume = Muted also works, it mutes the volume.

Tested GB, GBA and PSP with the same results.

I looked around for a config file which might store these FN switch settings, but didn't find anything.

EDIT: Forgot to mention, this has been happening at least for the past couple of months, so the last several versions. It's not a new thing that just started happening.

[MRKMKR]

This happens no matter what other options are selected and is specifically "Volume = Unchanged" bug. When switched and "Volume = Unchanged" it maxes to 100% and you cannot change the volume using the volume buttons, or at least it will not adjust at all for me. The workaround is as you have found setting a value so I have to have it "Volume = Muted".