Reading what Lucien did, I sequenced a few experimental multitrack four-measure loops on my XP-80. Here are some things I noticed, but don't know well I trust my ears: 1. It seemed that I could sequence many tracks without timing glitches if no slow/long attack time sounds were used. 2. When sequencing pads and strings sounds with long attack times, the timing of the drum track was thrown off; I thought that maybe it was just my ears deceiving me, but adjusting the attack time of the pads/strings to as rapid/short as possible did not improve the timing of the drum track. 3. Timing was generally better when entire loop was recorded in step time. 4. Sound dropouts were more common when the XP-80 was used to control other instruments (sounds from the tracks of other instruments dropped out). 5. When timing is off, it is off very slightly, but slightly enough to be bothersome. I don't know why these things happened and would love to hear from anyone that knows how to get around these apparent sequencer shortcomings (perhaps it is just the nature of hardware sequencers?). Perhaps there is something that I am not doing correctly? No matter what the sequencer can or cannot handle, playing and recording on the XP-80 is quite enjoyable!