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

You can order them into two main versions, with two revisions in each:

• Electribe