Korg KPR-77 For Sale. Vintage analog drum machine, great alternative to the popular Roland TR and CR series. Has the following great analog synth drum sounds: kick, snare, toms, closed and open hi hat, cymbal and claps. Programmable flam, mixer for all sounds, DIN sync, 2 trigger outputs for triggering arpeggiators, sequencers, etc. We really like the sound of this one, it's similar to the Roland CR series compurhythms and other vintage beatboxes.