Harmony-G XT

Just wanted to let this forum know I recently purchased a TC Helicon Harmony G- XT. TC-Helicon | VoiceTone Harmony-G XT - Vocal Harmony for Guitarists Wanted to let everyone know it is phenomanal. It is also a very nice mic preamp with phantom power . In fact I'm thinking of purchasing...

...I'll get my act together for something on the 16th, too! So. Tonight I'm offering up a TC Helicon X1 Voicetone. It's a vocal distortion box. I bought it to use live, but it proved to be a feedback machine. I thought I'd work it into my studio chain, but never...

Real newbie here. I've been advised to buy a TC Helicon VoiceTone C1 as a key / pitch controller. A lot of the songs I play (acoustic guitar) have multiple key changes. The sound engineer I've been getting advice from suggested I ask in this forum is the a single unit to switch keys...