A few small Tri-State Relay Service improvements

I just released a new version of Tri-State Relay Service with a few small improvements that have made it even more helpful for my day-to-day usage. The biggest one is a playback boost for generated voices. I have some voices I like, but a few were quiet enough that I would miss updates even with my Mac volume all the way up. TSRS can now add between 0 and 12 dB of gain before it plays generated…