Anatomy of a Pluck
A pluck sound is defined by its transient — the sharp initial burst of energy when a string is struck or plucked. After that burst, the sound decays quickly to silence. In synthesis terms: near-zero attack, very short decay, zero sustain, and a short release. But the waveform you choose shapes the character of the pluck just as much as the envelope. A sawtooth pluck is bright and guitar-like because it contains all harmonics. A sine pluck is soft and mallet-like because it has none. The envelope controls the shape in time; the waveform controls the tonal colour.
The module starts on SAWTOOTH — trigger a pluck and hear the bright, guitar-like character. Then switch to SINE and trigger again. Notice how much softer and rounder it becomes. Work through all four waveforms and compare. Then experiment with the DECAY knob — longer decay gives a more resonant, guitar-like body. Keep SUSTAIN at zero: that's what makes it a pluck rather than a held note.