Hey @Alexbell, Unfortunately no this isn't possible. Looping was added to VoiceLive 2 in a firmware update, and it wasn't until VoiceLive 3 that we added the ability to change the looper's audio sources on the fly. Sorry!
Hey @Georgestanley, Couple things to check that might be misconfigured:
"Mix" menu, ensure the "Loop Level" is turned up
"Setup" menu, "Loop" tab, ensure the guitar is actually being looped in the first place with the "Input" parameter
Hopefully it's one of those but if not report back and we'll figure it out. Cheers!
Hey @Kirton, Looks like you answered your own question - it's VoiceLive Play. There's also the Perform-V, but to get this unit working with set-key harmonies you need to import presets from the app, and it only has 3 preset slots. Cheers!
Hey @FredErben, Here's a list of possible Switch-3 targets in PlayAcoustic (taken from page 35 of the manual):
► Loop Rec/Play ► Loop Stop/Clear ► Loop Undo ► Loop Start/Stop ► 1 Btn Looper ► Tap Tempo ► Set Key ► Preset Down ► Preset Up ► Hit ► Harmony ► Harm Moment ► Doubling ► Delay ► Delay Moment ► Reverb ► HardTune ► Transducer (including megaphone) ► µMod ► Gtr Amp ► Gtr Boost ► Gtr Compressor ► Gtr µMod ► Gtr Delay ► Gtr Reverb
As you can see, you can use the Switch-3 to toggle harmonies on and off (with a latched or momentary function) but you can't assign unique harmony voicings to the Switch-3. In other words, the footswitch can only turn harmonies on and off, if can't select specific styles of harmony. To change between different harmony voicings you'll need to use multiple presets and change between them. Cheers!
Hey @MrLue, The Harmony effect in Perform-V can be raised to unity gain at most. Meaning the loudest it can get is on par with your lead input voice. You unfortunately cannot add gain to the harmony voices to make them louder than your own voice, that functionality is only present on our more complicated multi-effects units. Cheers!