Bass-Romp bass pedal instrument

I’t’s a four pedal instrument which can play a chromatic octave in any selected key.

Choose the key with the left (k+) button, or k-. The key is displayed at the right end of the LED display.

Choose a continuous (p0) or pulse (p1, 2, or 3) using the p+ key.

Toe end of second pedal is the chosen keynote, heel end of any pedal is one musical fifth below the toe end.