Roland SC-7

It complies to the General MIDI System Level 1 Specification with 128 sounds, 6 drum sets (derived from GS drum sets) digital reverb/delay and chorus effects.

It can also be configured as a MIDI interface for either IBM PC/AT or Apple Macintosh computers with a special serial cable and Roland software.

The Roland SCB-7 was a Roland MIDI Daughterboard version of the SC-7 that plugged into the Wave Blaster Connector of the Sound Blaster line of sound cards for the PC.

The Roland RAP-10 was an ISA sound card with the SC-7 on board along with digital sampling.

Polarity: shield (sleeve) positive, core (tip) negative.