iPad · Modular Music Creation System

LH NULL app icon

LH NULL

Design the sound, and the rules it plays by.

LH NULL is a modular music creation platform built for iPad. It brings sound synthesis, composition, logic, and real-time interaction together in one open environment. Build synths, instruments, effects, and musical structures, then develop them into complete pieces of music.

View on the App Store
LH NULL performance patch with Sample Players, Rhythm Rings, layered step sequencing, and audio routing
A modular music system combining sample playback, rhythmic structures, sequencing, and signal routing.
Sound DesignSynthesis · samples · filters · effects
Rules & SequencingLogic · probability · clocks · rhythm
Real-World ControlMIDI · OSC · motion · camera · gamepad
Reusable SystemsProjects · Patches · custom I/O

Sound Design

Build sound from source to output, and combine multiple synthesis approaches inside the same Patch.

  • Sources: analog-style oscillators, wavetable, single-cycle waveforms, samples, and noise.
  • Synthesis: subtractive, FM, phase modulation, and phase distortion.
  • Waveform shaping: bend, fold, and reshape waveforms to control harmonics and spectrum.
  • Filtering and dynamics: resonant filters, envelopes, and dynamic shaping.
  • Effects: processing for dynamics, tone, space, stereo movement, and rhythmic transformation.
  • Instrument building: multi-voice instruments, drums and percussion, and custom effect chains.
LH NULL canvas showing connected synthesis, modulation, sequencing, filtering, and output modules
Connected synthesis and control modules on the LH NULL canvas.

Set the Rules

Design how the music system behaves. Sequencing, math, logic, probability, and modulation can work together so a Patch can respond to conditions and evolve autonomously without writing code.

  • Sequencing and rhythm: Note, Step, and CV sequencers, Rhythm Rings, independent clocks, and BPM sync.
  • Math and logic: arithmetic, comparison, conditions, signal selection and routing, and counting.
  • Probability and randomness: combine random events with deterministic rules.
  • Modulation: multiple LFO types, Phasor, and looping envelopes for evolving timbre and structure.
LH NULL patch using Note Sequencer, CV sequencing, wavetable sources, logic, math, and envelope modules
Sequencing, sound generation, logic, and control structures can coexist in one Patch.

Respond to the Real World

Bring outside signals into a Patch and use them to drive sound parameters, logic, sequences, and events.

  • MIDI: notes, velocity, controllers, pitch bend, and modulation data.
  • OSC: communication with external software, devices, and control systems.
  • Gamepad: sticks, D-pad, triggers, and buttons.
  • Accelerometer and gyroscope: motion and rotation from the iPad.
  • Camera: brightness and RGB color changes converted into control signals.
LH NULL input modules for MIDI, OSC, game controller, iPad motion, and camera signals
MIDI, OSC, game controller, motion, and camera inputs inside the modular environment.

Reusable Patch

Turn what you build into tools you can reuse. A Project can contain multiple Patches, pass audio, control, and event signals between them, and save modular structures as Reusable Patches with inputs and outputs you define.

Build a personal library of instruments, effects, and logic structures for future projects instead of starting from zero each time.

Complete Creative Environment

The workspace includes a visual canvas, module library and Inspector, undo/redo, Scope and signal monitoring, Project and asset management, import of your own sounds, Demo Projects, interface themes, and configurable audio buffer, control rate, and A4 tuning reference.

  • Built-in module reference: each module's function, ports, and parameters.
  • Quick Start: from adding a sound source and connecting Output to making your first sound.
  • Monitoring: Scope and signal tools help inspect control and audio behavior.
  • Project workflow: manage Patches, assets, imported sounds, and reusable structures in one environment.
LH NULL effects modules including compression, delay, reverb, chorus, phaser, stutter, lo-fi, and rhythm gate
A selection of dynamics, spatial, modulation, lo-fi, and rhythmic effect modules.

Interface & Patches

The following images are taken from the App Store release material and show different parts of the modular canvas and module library.

Modular synthesis patch combining oscillators, CV sequencing, math, filtering, envelopes, and output routing in LH NULL. LH NULL canvas showing connected synthesis, modulation, sequencing, filtering, and output modules. A modular LH NULL patch with sound sources, control modules, and signal routing on the iPad canvas. An LH NULL patch combining sequencing, modulation, and connected modules for a generative music structure. LH NULL patch using Note Sequencer, CV sequencing, wavetable sources, logic, math, and envelope modules. Detailed LH NULL music system combining sequencing, sound generation, logic conditions, and routing. LH NULL input modules for MIDI, OSC, game controller, iPad motion, and camera signals. LH NULL effects modules including compression, delay, reverb, chorus, phaser, stutter, lo-fi, and rhythm gate. LH NULL performance patch with Sample Players, Rhythm Rings, layered step sequencing, and audio routing.

Click any image to open the larger version.

Available on the App Store

LH NULL is available for iPad from Apple's App Store.

Open LH NULL on the App StoreProduct information on GitHub