Allen, actually, the Harmony M was set to two part harmony, but both were set at higher, while the S-950 was at factory default, which I believe is a duo setting.

The update on the Harmony M is easily done through their site, where you can download the update and install it in a few minutes. I didn't have a problem doing this, but that was so long ago I cannot remember exactly what I did at the time.

All the best,

Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)