Modifying the Boss DR-110
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Cymbal Filter I find the cymbals to be one of the better voices in the DR-110. Much like the hihats, the cymbals create some very nice effects when you hit the accent button during the cymbal's sustain. I found a nice way to change the timbre by adding a control for the Cymbal Filter. Much like the Hihat filter, when turned all the way towards the treble side, this can create some crazy sounds. I suspect this is due to the type of noise generator used for the cymbal circuit. Listed below is the modification I came up with. You need to remove R16 from the voicing board in your DR-110. Solder two wires into the old location, and fly them to a new circuit board. On this new board, construct the circuit shown in the box on the right. Use a 1K linear pot for the manual filter control, and a 100K log pot for the CV level.
Cymbal Decay The Cymbal Decay control adds some really strange effects to the DR-110. This will allow extremely short or extremely long cymbal sustain (15 to 20 seconds!!). Especially strange noises can be created when used in conjunction with the filter mod above. I chose to simplify things and skip the voltage control on this mod. You can add it if you'd like with the same circuit I've been showing in the other mods. Remove R44 from the voice board and attach 2 wires to the holes in the circuit board. You'll need to wire a 1K series resistor and 1M linear potentiometer as shown in the diagram below.
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