eh, one time in WV we were taping Karma to Burn, Treasure Cat, and West by God - the first 2 acts being instrumental. the snbd of West by God had NO vocals in it. was glad to have ran seperate AUD audio, mixed about 25% of the snbd w/ 75% of the aud, the other 2 bands of the night were about 50/50, but to not have the vocals sound extremely low in the mix had to boost the audience.