With this handy device you can synchronize the tempi of several synths, like the BirdAlert or the SchranzMachine. You simply connect the sync-inputs of your synths to the Masterclock and control their synchronized tempi with the big knob.


The MasterClock is an square-wave oscillator build with one 4093-CMOS-Chip, a capacitor and a potentiometer. It also divides the frequency of the clock signal to generate a reset signal, which is needed to start a sequencer at the right time.


  • square-wave oscillator for clock signal
  • 7 clock outputs (3 with switchable reset pin)
  • LED indicator for clock pulse and reset pulse
  • 9V-Battary powered