Tc-Helicon has released a series of Video Manuals for their VoiceLive Play and als VoiceLive Play GTX ... These videos try to be comprehensive, but don’t cover every usage case.
TC-Helicon | VoiceLive Play Part 1
TC-Helicon | VoiceLive Play Part 2
TC-Helicon | VoiceLive Play Part 3
GTX Guitar Part 1
GTX Guitar Part 2