A small vibecoded collection of custom effects for the Korg NTS-1 digital mkI, built with the Korg logue SDK.

Some effects are available in different slot variants (MOD, DELAY, and/or REVERB) so they can be combined more freely depending on your setup.

A live buffer glitch effect that captures, repeats and destroys fragments of incoming audio.

Parameters

• Crush — digital degradation
• Speed — fragment length and repetition speed
• Hold — controls how strongly GlitchB holds onto the current fragment; at 100% the buffer freezes completely. To adjust it, hold the DELAY button and turn the B knob.

A long-memory overdub delay that continuously layers incoming audio into a repeating loop.

Parameters

• Loop — loop length, from short repeats up to roughly 25 seconds
• Overdub — amount of new incoming audio added to the existing loop
• Decay — controls how long old layers remain, from a few seconds to effectively infinite feedback. To adjust it, hold the DELAY button and turn the B knob.

At high Decay settings, new sounds can gradually accumulate into a dense evolving wall of audio while older layers continue repeating underneath.

A clean real-time pitch shifter / octaver.

Parameters

• Pitch — -24 to +24 semitones
• Mix — Dry to Wet

Useful for octave-down/octave-up effects, harmonies, and full-range pitch shifting.

A simple gain and saturation effect.

Parameters:

• Gain — -6 dB to +36 dB
• Saturation — Clean to heavily driven soft clipping

Can be used as a clean booster, preamp, or distortion stage.

A wide multi-voice stereo chorus.

Parameters:

• Depth — Chorus modulation depth
• Ensemble — Stereo width and number/intensity of additional chorus voices
• Rate — Modulation speed in v0.4 DELAY and REVERB versions. Hold the corresponding effect button and turn the B knob.

At higher settings it becomes a dense ensemble-style chorus with strong stereo movement.

v0.4 uses asymmetric LFO movement: upward pitch movement is softer and less prominent, while downward movement is stronger. This gives it a deeper, heavier character with fewer prominent high-pitched voices, while v0.2 keeps the brighter and more symmetrical original StereoCh sound.

A more extreme ensemble chorus built around multiple independently moving voices.

Parameters:

• Depth — Modulation depth
• Swarm — From a relatively simple chorus to a dense moving cloud of voices

The voices use different modulation speeds, phases, and delay times, creating a constantly shifting stereo field.

Especially useful for vocals, pads, drones, and heavily processed sounds.

Install the .ntkdigunit files using Korg NTS-1 digital Librarian or logue-cli.

On Linux, large user units may require a larger ALSA MIDI SysEx buffer. If transfers freeze or time out, increasing:

/sys/module/snd_seq_midi/parameters/output_buffer_size

to 65536 may help.

These effects were made for the original NTS-1 digital (mkI).

Different category versions of the same effect use the same DSP idea but are adapted for the corresponding logue SDK effect API.

The effects in this collection are vibecoded: the ideas, sound design, testing, and direction come from me, while AI is used to help implement them in code.