Studio vocal effects and processing on location! That's the idea behind this device, a TC-Helicon VoiceLive Play GTX, which Jeff uses in his solo performances. Adaptive tone technology intelligently controls EQ and Dynamics (Compression & De-ess) to provide tonal balance and dynamic control. An adaptive gate helps suppress feedback. Reverb, echo, delay, and other effects are available through this little box, as are two voices of harmonies and voice doubling. Included are a full range of guitar effects, so if you want to hear one of Jeff's acoustic guitars sound like a Les Paul through a Marshall stack, this will do it!