Of course some old analog synthesizers could more or less easily produce acid sounds, here is a small list of the best acid synth you could try to find on the second hand's market :
| MODEL | FEATURE | EMULATION RATING |
| ROLAND MC-202 | mono, 2 tracks sequencer with accent, portamento, timing and sync, cv/gate in and out | up to 90% close |
| ROLAND SH-101 | mono, internal sequencer and sync, less grungy than the 202 | up to 80% close |
| ROLAND JUNO SERIE (6, 60 and 106) | poly, easy to program, no memory on model 6, midi for the model 106 (including sliders...) | up to 85% close |
| SEQUENTIAL CIRCUITS PRO-ONE | mono, 2 osc., lot of modulation routing, internal sequencer with trigger in as sync, cv/gate in and out, external input | up to 70% close |
| YAMAHA CS-30, CS-20, CS-15 | not checked, but grungy acid synth | try it ! |
More to comes, soon ...