There are many modifications and expansions for the Roland TR-909, and consequently, numerous replicas and clones like the Behringer RD9. We currently have our two RD9 units on the workbench, testing which of these work best for us.
We noticed that no one had yet thought of meaningfully grouping the individual outputs as subgroups.
So we experimented a bit. When using the individual outputs, the signals are muted from the main/sum mix. This gave us the opportunity to utilize this feature and combine signals.
Now, when the switch is flipped, individual buses are routed on our units. We were thus able to combine all the individual outputs onto just 4 Busses:
- 1. Toms
- 2. Snare Drum, Clap + Rimshot
- 3. Hi-Hats, Crash and Ride
- 4. Bass Drum (remains on).
All you need is a switch with 3 pole On / Off / On and some cables per Bus you want to build.
Just build a signal bridge on the switch in the middle postion and route the other cables to other stage. The cable where you route to the switch will be your out for the Bus. So our Tom Bus comes out on Low Tom, if it switched on in example.
other usefull Mods for TR-909 / RD9: