Bill,
I've been using a Digitech VR for years and just began using the Harmony M. The Harmony M is much clearer, the vocals are full, and it's very easy to set up.
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.)