I thought I’d try an external feedback loop with Rainmaker to see what additional possibilities it offered for Karplus Strong synthesis beyond the 4 filter types in the internal feedback path. I thought that using a complex filter like Morgasmatron would offer some additional sculpting capabilities. I got some unexpected results when I did this and wanted to see if anyone had suggestions.
- Start with P38: KarplusStr
- Tap output with stackable cable, one side to audio output, the other to Morgasmatron input A
- Morgasmatron mix out to external mixer channel 2 in
- Filtered, enveloped white noise to external mixer channel 1 in
- Mixer out to Rainmaker in
- Rainmaker comb feedback all the way down
- Mixer channel 1 (sculpted noise) close to unity gain
- Slowly bring up mixer channel 2 (filtered feedback circuit) to increase the feedback amount
I was expecting raising mixer channel 2 to have a similar effect to increasing Rainmaker’s comb feedback dial - that it would lengthen the decay of the sound.
What actually happened is that it didn’t do much of anything. I tried removing Morgasmatron from the feedback path, routing Rainmaker’s output directly back to it’s input (through an attenuator). Same thing. Little to no result on the sound with low amounts of feedback. As feedback is increased, it adds more of a rumble to the sound but didn’t really increase decay time.
Any thoughts on this?