3 EDPs (1 Oberheim, 2 Gibsons) though I've only ever used 2 at once and one of them (the newest Gibson) is being flakey right now. I use them as independent but brother sync'd loops. I got the third expecting to run one stereo pair and a mono loop, but rack space is at a bit of a premium when not at home. I recently picked up a Line6 DL-4 and a Line6 EchoPro and I've played a bit with the loopers on them, but I mostly got them for the delay models. I will use the hold feature on the Korg DL8000R or feedback control on the Lexicon Vortex to sustain relatively short loops, but I mostly use them for effects not looping. I liked the answer "my brain" since I have frequently just repeated material myself rather than using electronic assistance. --- Past loopers --- Digitech RDS3600 -- flaked out after about a year back in 1986. I've still got and it's free to anyone who comes and picks it up (Santa Cruz, CA). I would rather not have anyone expend cash to get it since I don't know whether it's repairable. A Roland rackmount echo whose name escapes me right now.