There are already 2 built-in ways to do this…
If you select the device as a switch/dimmer, the 99 tracks correspond to the 99 dimmer levels. Unfortunately the built-in apps only support values in multiples of 10s so you have to re-organize your tracks so that the sounds you want to play are numbered 10, 20, 30, etc.
I also released a new version last night that allows you to play the sounds in SHM and Speaker Companion.
Select the device from the Audio Notifications section of either app, choose Custom Message, and then enter the track number you want to play. Unfortunately If you play the sounds using this method they’ll be delayed by a couple of seconds because of the way ST handles the audio notification custom messages.