Topaz 1 + Compac 2 is a synth mode for the 201 Pocket Piano. It features voices from two vintage synths: the Topaz 1 bayan from Formanta and the Compac 2 from Univox.
The knobs control the following:

Knob 1: Envelope. The knob is split in half: left side is without attack, right side is with attack.

Knob 2: Synth Voice. Select from 12 knob positions.

Select 6 tones without vibrato (left side), and the same 6 tones with vibrato.
Knob 3 : Playback Speed. Sets overall speed – used in tandem with transpose keys.
Polyphony: 7 voices.
Have fun!
_ _ _ _ _ _
Revision History:
 1.0 – May 25 2024.
The idea behind the game is easy, but it’s hard to get good at it. Tap to jump, hold to fly, and miss everything that gets in your way. If you hit anything, you’ll start over. To beat each level, you need to practice and time your moves well. Play geometry dash subzero online!