My friend Earl, who plays in a pretty happenning band but hates computers asked me a pretty interesting question that I'd like to relay to y'all. Earl's band has a new(ish) drummer. Before the new drummer's arrival, an entire CD was recorded and released. Earl still plays the same bass parts he recorded, expecting the new drummer to play the other drummer's parts. After rehearsing a brand new song, the drummer said that's the best they ever locked in together. The previous drummer didn't do anything special, but gave Earl a lot of room. The new drummer plays slightly busier and can't quite pull all his ideas off yet. Should Earl: 1)Play his parts exactly like the arrangement and expect the drummer to catch up (or on), or: 2)Change his basslines to lock in with what the drummer is doing. Keep in mind that Earl spent considerable time writing the basslines and they work well with the vocal and guitar parts.