Alex Hutchings: Demo of Polyphony on the BOSS SY-300 Guitar Synth Musikmesse 2015



MESSE 2015: Demo of Polyphony on the BOSS SY-300 Guitar Synth Alex Hutchings demos the pedal\'s full capabilities

MESSE 2015: Demo of Polyphony on the BOSS SY-300 Guitar Synth

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