This video offers a quick introduction to Karplus-Strong Synthesis – a physical modeling technique that’s great for creating both realistic and creative string and percussive sounds.
In the video, Nikol of Bastl Instruments introduces the concepts of Karplus-Strong Synthesis and then creates an example patch with the Noise Kitchen Eurorack modular synth.
How Karplus-Strong Synthesis Works:
- A short impulse is generated to simulate a ‘strike’ or ‘pluck’. In the original algorithm, the impulse was a burst of white noise, but other types of signals can be used.
- The impulse sound is output and simultaneously fed back into a delay line. The length of the delay time determines the pitch of the resulting sound.
- The output of the delay line is fed through a filter. The filter characteristics and settings determine the harmonics of the resulting sound.
- The filtered output is fed back into both the output and the delay line.
Diagram via Tlotoxl