Penrose

A quantiser in 6 HP with a keyboard on its face: twelve lit buttons pick the notes of the scale, and the CV at IN comes out on the nearest of them. With a cable in TRIG it moves only on a trigger, and GATE sends 5 V whenever the output changes.

Key features

• Twelve lit buttons, one per note: green when the note is in the scale, red for the note being played
• CV input and quantised output, 0 to 10 V
• TRIG input: with a cable, the output changes only on a trigger; without, it follows the input
• GATE output: 5 V each time the output note changes, shown by the LED
• The scale is kept about 15 seconds after the last change, and is back after power-up