All about the Roland Jupiter-series

Hi there,

As this is an analaogue machine, it shouldn't be all that difficult to find
the pots that are responsible for the mastetuning of individual VCOs. Do you
have a diagram and a bit know-how on electronics? Than you'll be able to fix
this in a jiff. You could either use oscilloscope or a simple frequency
counter prior to your ears to get the tuning at the desired pitch.

Good luck,
RVe