The square-wave gives you that classic lofi sound. It's played with a larger knob which controls the frequency. Hitting "A" has the knob work from a low to high pitch and "B" is the reverse. Pressing both merges this into one frequency that causes the knob to play from high to low and back to high which gives you a bit of flexibility.
Where "start" was is now the on/off toggle and "select" is now a red led. Power and signal are connected through the original wire to a breakout box containing a 9v battery for power and standard 1/4" jack (perfect for connecting to amps or recording equipment). The case of this controller shows it's age and one of the screws on back needed to be swapped out.
Take a listen….
http://www.youtube.com/watch?v=Kehg8pmdSXY
Have any questions?
Contact the shop owner.
