Hi Bob

Thx for ur interest. We have performed at many venues, but power source usually good. We do use an ext cable but is is short and wide in diameter. I guess the issue is that BIAB has been consistently excellent for decades. Recently, we changed computers and added the MG10 Yamaha mixer. Those are the two variables recently. We currently are having the computer examined for adequate drivers and sound cards. We are told that the MG10 mixer is a good product and , probably not the culprit, and we agree that it is unlikely that the mixer has contributed to the problem. As also mentioned before, it is unsettling to be rolling along on a song, doin our thing when the background rhythm provided by BIAB goes wonky, either changing tempo or quitting altogether.