Patching up a Karplus-Strong synth from scratch in Pure Data Vanilla from scratch.
Karplus-Strong synthesis is a digital synthesis technique that simulates the sound of plucked strings by using a feedback loop to model the behavior of a vibrating string. Developed by Kevin Karplus and Alex Strong, this method generates resonant waveforms by feeding back a short noise signal through a filtered delay line with feedback. In this video, we build a simple K-S synth from scratch in Pd, exploring what happens when we mess with the various parameters.
- 0:00 Defining Karplus-Strong synthesis
- 1:25 Noise “burst” to excite the string
- 3:23 Adding the delay
- 4:57 Setting up the feedback
- 7:13 Controlling the rate of the delay
- 10:21 Understanding the range of pitches
- 12:06 Adding the low-pass filter
- 13:21 Talking through the patch
- 14:05 Adjusting the envelope of the noise (bowed sounds?)
- 16:02 Closing / Next steps / Randomization
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