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ModKorg logue SDK synths

glitchy_mki-NTS-1-digital-kit

ksd6700/glitchy_mki-NTS-1-digital-kit · ★ 0

A controlled glitch modulation effect for KORG NTS-1 mkI and other logue SDK synths

README from GitHub, MIT

GLITCHY — a KORG logue SDK modulation effect

Cut, reverse, crush, freeze, and gate the last few milliseconds of sound. GLITCHY turns two knobs into a controlled digital accident.

日本語 · English

Quick downloads

The NTS-1 digital kit mkI file is here: Download glitchy.ntkdigunit

SynthReady-to-load unitMinimum firmware
Nu:Tekt NTS-1 digital kit mkIDownload .ntkdigunit1.02
minilogue xd / xd moduleDownload .mnlgxdunit2.00
prologueDownload .prlgunit2.00
Nu:Tekt NTS-1 digital kit mkIIDownload .nts1mkiiunit1.0.0
microKORG2Download .mk2unit2.0.0

Download every build as one ZIP · Release page

The same v1.0.0 binaries are also committed under dist/v1.0.0 for a source-pinned download. SHA-256 hashes are included.

日本語

GLITCHYは、直前の音を短く切り取り、スタッター、リバース、マイクロループ、ハーフスピード、ビットクラッシュ、サンプルホールド、ランダムゲートを組み合わせるモジュレーション・エフェクトです。NTS-1 digital kit mkIを中心に、同じ音のキャラクターをKORG logue SDK対応シンセへ移植しています。

操作

パラメーター内容
A / TIME切り取る長さを約12–85 msで変更。左ほど細かく、右ほど大きく崩れます。
B / CHAOSエフェクトの発生率、ウェット量、モード、ビット深度、ゲート密度をまとめて変更。0では原音です。

CHAOSを少し上げると時々スタッターが入り、中央付近ではリバースやフリーズが混ざり、最大付近では4-bitクラッシュと細かなゲートまで加わります。切り替わりには短いクロスフェードを入れ、不要な大音量クリックを抑えています。

NTS-1 mkIへの入れ方

  1. 上の glitchy.ntkdigunit をダウンロードします。
  2. KORG NTS-1 Sound Librarianを開きます。
  3. ファイルを USER MODULATION FX の空きスロットへドラッグします。
  4. LibrarianからNTS-1へ送信します。
  5. NTS-1のMODセクションで glitchy を選び、A/Bノブで操作します。

他機種では、対応するKORG Librarian／EditorまたはmicroKORG2のUSB Mass Storageモードを使い、上表の機種別ファイルをユーザーmod FXとして読み込んでください。

ビルド

公式Docker環境がいちばん再現しやすい方法です。

./scripts/fetch-sdk.sh
BUILD_MODE=docker ./scripts/build.sh all
./scripts/package.sh v1.0.0

macOSでは、公式ARMツールチェーンをSDKの tools/gcc に導入したあと、v1系とNTS-1 mkIIをネイティブビルドできます。

make build-v1
make build-v2

microKORG2は公式Dockerビルド環境が必要です。SDKは再現性のためKORG logue SDK commit c224d07 に固定しています。

English

GLITCHY is a modulation effect that keeps a short rolling history of the input, then rearranges it into straight stutters, reverse slices, micro-loops, and half-speed lurches. As CHAOS rises, it also reduces bit depth, adds sample-and-hold grit, and punches rhythmic holes with a random gate.

The project started with the original Nu:Tekt NTS-1 digital kit and carries the same DSP core to every currently supported logue SDK synth target.

Controls

ParameterWhat it does
A / TIMESets the captured slice from roughly 12 to 85 ms. Turn left for tight digital buzz; turn right for broader stutters.
B / CHAOSMorphs glitch probability, wet level, playback mode, bit depth, sample hold, and gate density. At zero the signal is dry.

Low CHAOS adds occasional repeats. Around the middle, reverse and frozen fragments start to appear. Near maximum, the signal can fall to 4-bit resolution and break into sparse gated shards. Short edge crossfades control accidental full-scale clicks without sanding away the glitch character.

Install on NTS-1 mkI

  1. Download glitchy.ntkdigunit.
  2. Open KORG NTS-1 Sound Librarian.
  3. Drag the file into an empty USER MODULATION FX slot.
  4. Send the user data to the NTS-1.
  5. Select glitchy in the MOD section and play with knobs A and B.

For the other synths, load the matching file from the download table with that instrument's supported KORG Librarian/Editor. microKORG2 also supports USB Mass Storage transfer.

Build from source

The official Docker environment is the reproducible path and is also used by GitHub Actions:

./scripts/fetch-sdk.sh
BUILD_MODE=docker ./scripts/build.sh all
./scripts/package.sh v1.0.0

On macOS, after installing KORG's recommended ARM toolchains into the SDK's tools/gcc directory, the v1 targets and NTS-1 mkII can be built natively:

make build-v1
make build-v2

microKORG2 requires the official Docker build environment. For reproducibility, the scripts pin KORG logue SDK commit c224d07.

Supported builds and architecture

SDK familyTargetsFormatShared DSP
logue SDK 1.1NTS-1 mkI, minilogue xd, prologuePackaged Cortex-M4 unitStereo, plus prologue main/sub timbres
logue SDK 2.0NTS-1 mkIIARM Cortex-M7 shared objectStereo
logue SDK 2.1microKORG2ARM Cortex-A7 shared objectStereo

The audio callback performs no heap allocation. A 64 KiB rolling buffer lives in the external effect memory. The portable DSP is tested on the host before every target build. The release files are cross-compiled and format-validated; reports from different hardware and musical edge cases are very welcome.

Development

./scripts/test.sh                    # host DSP behavior and safety checks
./scripts/prepare-targets.sh all     # overlay GLITCHY onto official templates
BUILD_MODE=docker ./scripts/build.sh all

Source layout:

  • dsp/glitch_core.hpp — allocation-free portable DSP.
  • overlays/v1 — logue SDK 1.1 wrapper shared by the three binary-compatible targets.
  • overlays/nts-1_mkii — SDK 2.0 unit definition and wrapper.
  • overlays/microkorg2 — SDK 2.1 unit definition and wrapper.
  • scripts — pinned SDK fetch, target preparation, build, test, and packaging.

Contributions, bug reports, new glitch modes, and hardware test notes are welcome.

License and trademark note

GLITCHY's original source is released under the MIT License. The build downloads KORG's separately licensed logue SDK and starts from its official templates; the SDK is not vendored here.

This is an independent community project and is not affiliated with or endorsed by KORG. KORG, Nu:Tekt, NTS-1, minilogue, prologue, microKORG, and logue are trademarks of their respective owner. Back up your user data and use third-party units at your own risk.