Crumar Performer drum-machines functions basically work but control

functions basically work but control voltages are unstable

manufactured new one

Clock rate vernier sometimes slips

They are single-VCO synthesizers (derived from the GX-1) with preset sounds and basic synthesis capabilities

The SY-1 and SY-2 are the first compact/portable analog synthesizers produced by Yamaha

Crumar Performer drum-machines functions basically work but controlThe Performer is a polyphonic analog Strings and Brass machine produced at the end of the 1970's by the Italian synth company. It is slightly compact with just 49 keys. But it is fully polyphonic you can play all 49 notes simultaneously! Programming is simple and clearly laid out with just 15 sliders and a few buttons. A solid black chassis and wood end cheeks round out this classic and often overlooked string machine.