In consumer audio, you produce the sound and you're done. In devices used for musical performance, you produce audio, which then feeds into the brain of a musi

In consumer audio, you produce the sound and you're done. In devices used for musical performance, you produce audio, which then feeds into the brain of a musician, who then makes an decision to change their behavior in response to what they're hearing, which then effects the audio. Those constant round-trips through the brain make it very easy to notice latencies. (They pull you out of "the zone".)