Introducing the wonderful CRB Computer Band 2000 - a mainly analog auto-accompaniment machine from the the late 70s and early 80s with four sections:
1.Drums with individually mutable sounds and fill-in and variation options
2.Bass section with three sounds, decay controls and two modes
3.Two chord sections with a total of seven sounds, decay and volume controls.
4. And an arpeggiator with four different sounds and decay control.
A great song writing tool when you're stuck and simply a very inspiring instrument.
The Computerband 2000 was originally made for big home-organs, they're incorporated into the CRB 910 organs and a few Solton branded ones as well.
These stand-alone units are very rare.