>I wonder if it can be master or slave? It only has a MIDI in connection, so it's slave sync only. zZounds has the manual online here. http://cachepe.zzounds.com/media/SL-20_e1-8aaab0f15d3b423b2dec9f1a4b790c77.pdf MIDI Implementation Version: 1.00 1. Receive Data ? System Real-Time Message ? Timing Clock Status F8H ? Start Status FAH * Upon receiving the Start (FAH), the slice pattern returns to the start of the pattern. ? Continue Status FBH * Upon receiving the Continue (FBH), the SL-20 continues to playback in sync with the external MIDI device.