Thanks Noel. No frozen tracks. Problem is not in the playback, so track muting doesn't help find any problems, since playback went fine. It's the rendering that got out of synch and sounded like a train wreck when after a soft intro verse, the first chorus brought in all other instruments including drums, and muted guitar ( first midi, then subbed that out for the realtrack muted guitar with phaser) on top of an acoustic bass (midi) and acoustic realtrack guitar. Synch in playback was not a problem, just in wav rendering. The transition into this full ensemble chorus was preceded by a measure with embedded chord hold, and bar setting that changed tempo to extend the chord hold a bit. Then the first measure of the chorus had bar settings to un mute the ensemble instruments previously muted, and change the tempo back to beginning tempo.. The style is FOlkFunk. I have worked around the unknown distinctive cause for the out-of synch rendering by dropping the tempo changes and subbing a realtrack for the midi guitar track. Things synched back up in the rendering, and all is merry.

DrDuBose
"Gettin' a life."

music at
http://www.bandmix.com/drdubose