Here's a lovely water triangle to ease your stressful lifestyle.
One of the best waveforms on the Roland MC-307 is this looped sample of running water, I superimposed it against a triangle from the system 100 here. I might do a whole library like this, natural recordings against analog waveforms..
This patch allows you to control two parameters recorded from the original sound. First are recordings of the filter, being modulated by LFO 3. By modulating the S.Select value you can simulate the filter opening and closing. The second available value is the position in the wavetable. This can be modulated by sending data to MIDI CC 74. For instance you could assign it to velocity by using Logic x’s Modifier plugin.