Me parece igual que el pelado (que toca como los dioses!) le metio mouse posterior...
,...en el video explica la configuracion...
The guitar I'm using here is a bit special; It's an old Roland (!) G505 synth controller guitar. (built for Roland by Ibanez, I think; it's quite similar to the old Ibanez "Blazer" model). It actually has a built-in hexaphonic guitar synth pickup which can be used to control Roland's old GR series analog guitar synths. But this was made before Midi became standard, and is not compatible with today's guitar synth systems, so I've mounted a new GK-3 pickup on it next to the old one.