Casio SK-1 sync input:

This sk-1 modification is based off a 4016 bilateral switch IC. The 5v analog pulse from the tr-606 drum machine is triggering the IC which is in turn switching the 'one key play' function on the Casio. This allows for prerecorded melodies to be synced with the tr-606. by SWIFT



this vid also features my speak & spell w/ trigger input.