2hp/pluck

Pluck

2hp

A Karplus-Strong algorithm based string synthesizer with four-voice polyphony, offering controls for decay time and dampening to shape plucked string tones from percussive transients to long sustaining sounds.1078

Capabilities 3

1V/Oct Trackingv-oct-tracking
1078
Four Voice Polyphonyfour-voice-polyphony
Maintains up to four simultaneous voices; the oldest voice is replaced when a fifth trigger is received.1078
Physical Modeling Voicephysical-modeling-voice
Implements the Karplus-Strong algorithm to synthesize plucked string tones with adjustable dampening and decay.1078

Jacks 5 (4 in / 1 out)

NameSignalVoltageDescription
Inputs (4)
Damp CVcv-5V to 5VBipolar CV input summed with the Damp knob position to modulate string damping.1078
Decay CVcv-5V to 5VBipolar CV input summed with the Decay knob position to modulate note duration.1078
Trigtrigger—Triggers generation of a new note using current knob and CV states; cycles through four voices, replacing the oldest when all are active.1078
V/Oct CVcv—1V/octave pitch CV input summed with the Pitch knob to set the fundamental frequency.1078
Outputs (1)
Outputaudio-5V to 5VAudio output carrying the synthesized plucked string signal at 10Vpp; amplitude is visualized by the output LED.1078

Parameters 3

NameTypeRangeBehavior
Damp Knobknob—Adjusts the virtual string size independently of pitch; fully left produces maximum dampening with few harmonics, fully right produces maximum harmonic content.1078
Zones
Minimum Damp
Maximum Harmonic Content
  • Minimum Damp -100–-100%String is as small as possible, dampening the most harmonics and producing the darkest tone.1078
  • Maximum Harmonic Content 100–100%String is as large as possible, maximizing harmonic content for the brightest tone.1078
Decay Knobknob—Sets the duration of newly generated pluck notes; fully left is shortest, fully right is longest.1078
Pitch Knobknob—Sets the fundamental frequency of the string; remains active on the most recently generated note, enabling vibrato, slew, and tuning adjustments while notes ring out.1078

Firmware history 0 versions

No firmware history recorded.

References 2

  1. [1078]
    2hp Pluck Manualmanual
    source 1078 canonical ↗ archived ↗
    ● verified 2026-06-03
  2. [1079]
    2hp Pluck product pageproduct_page
    source 1079 canonical ↗ archived ↗
    ● verified 2026-06-03