sup I've got a boss br-532. I was considering buying a roland vs 1680 on ebay because it is a cheap 16 track with a midi in jack and supports MMC and MTC. In addition, Boss is a division of Roland inc. so I would assume that the digital recorders would be more compatable with each other as opposed to another brand. My Boss supports MMC as a master but not as a slave. It also only has a midi out jack. Most of the new digital recorders that have midi in cost more then im willing to pay. Heres my questions: 1.Is an external MIDI device needed to sync up a Boss BR-532 and a Roland VS-1680 or 1880? 2. If an external MIDI device is needed to sync these machines up what is it called? 3. What problems could I expect to encounter from setting up a studio like this? 4. Would adding a third digital recorder (for example, another Roland VS-1680) create more potential problems?