I tried to play this but after just a few seconds I absolutely couldn't stand it.
max volume racking clacking for every single character of text. Music slider doesn't control it, Sounds slider doesn't control it, and voice doesn't control it either. Only way to get rid of it is to mute everything..
Thanks for bringing that to my attention. Seems like the renpy documentation has wrongly labeled sound channels. Uploaded a hotfix just now. You should be able to adjust volume via the "voice" slider now. Though you are not missing anything muted for now either. There aren't any other sound effects in this demo, yet.