this is actually a messy problem that needs to be resolved with the param menu update.
right now the way to update audio levels is to call ie
audio.level_cut(x)
which is what both awake and the menu level page do.
but the menu level page uses the mix class which is a paramset, so it can do get as well. clearly updating audio.level_cut directly is not going to update the mix pset.
right now this is a bug and will be addressed in the massive param page overhaul— or there might be a quickfix: https://github.com/monome/norns/issues/838