Thanks! I'm currently only using digital I/O (AES/EBU and SPDIF) though.

By the way, another issue I sometimes notice is a periodic sudden pop noise (like an impulse of very short duration), even happening when running the "Thru" program. I haven't yet checked to be sure that it's my H8000 creates them, but one of my ideas that it may be related to some digital sync issues.