Family of instruments from Korg, all have sequencer sbuilt-in, and another speciality. The 'S' models are for sampling and playing back samples, the 'A' models are for analogue-like sound modelling, the 'R' models are drum machines, and the 'M' models kinda combine elements of the 'A' and 'R' into a groovebox.

I own an ES-1, EA-1, and an ER-1

I group them into three main versions, with revisions in 1 and 2. Officially they're split into four generations:

• Electribe