Use a midi foot switch THR10 ii | Justin Rucker Tech Training - YouTube
Amazon.com: XSONIC Airstep YT Edition THR10II, THR30II Desktop Amp Foot Controller with 5 Footswitches, 3 Control Modes(Change Slots, Toggle Effects), 300H Playtime, Wirelessly Control Your THRII for Home and Gig : Musical
Second Hand Yamaha THR100H Dual w/packaging & footswitch - Andertons Music Co.
Amazon.com: XSONIC Airstep YT Edition THR10II, THR30II Desktop Amp Foot Controller with 5 Footswitches, 3 Control Modes(Change Slots, Toggle Effects), 300H Playtime, Wirelessly Control Your THRII for Home and Gig : Musical
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