AvailableMIDI & Modulation

Pitch Shift

Transpose notes by semitones and octaves.

Engine preview

VST3

About

Pitch Shift is the simplest MIDI effect: it adds a fixed number of semitones to every note that passes through. An octave knob shifts in multiples of 12 on top of that. A note that would land outside 0–127 is quietly suppressed rather than wrapped, because wrapping a C2 down to a B7 is never what a transposer should do.

This is a preview module. The transform is applied inline at the note event, so there is no latency and no scheduling. It sits in front of whatever instrument is mounted, exactly as the arpeggiator does, but where the arp re-times notes this module only re-pitches them.

System requirements.

The downloadable Pitch Shift release supports the hosts and systems listed below.

VST3macOS · arm64
Works in Ableton Live, Reaper, Cubase, Studio One, Bitwig and FL Studio.

Version 0.1.0

Build evidence

Every row below is a recorded build row or the recorded absence of one. Nothing here is inferred from what this module is meant to support.

Module: music.codex.pitch-shift v0.1.0
Built at: 2026-09-12T10:45:07Z
Closure hash: 04e818e8d56f…
Toolchain: scriptc 64acce1ae3b8…
moduleToolchainDist c621ffab721d…
pluginShellKitRuntime bca003784692…
faceShellGeneration 8533207ab81f…
uiPreservation cd28dbd7e3d6…
packagerVersion 3

Build result and download for each format
Format	Result	Download
Browser package (JS)	Builtweb bundle sha256 aef547a19ac0… · 177 KB	Built, but no downloadable archive was recorded.
Browser package (WASM)	Builtweb bundle sha256 3df36f4e382a… · 2.0 MB	Built, but no downloadable archive was recorded.
VST3	Builtdarwin-arm64Steinberg validator + VST3 host render: passed bundle sha256 c40379f41074… · 2.1 MB	CodexPitchShift-vst3-darwin-arm64.zip archive sha256 f3ec87d03936… · 2.1 MB · darwin-arm64
Audio Unit	Not built no recorded artifact row for au; native-lane-report.json is absent or records no au row for this module	Not built for macOS
CLAP	Not built no recorded artifact row for clap; native-lane-report.json is absent or records no clap row for this module	Not built for macOS, Windows or Linux
Standalone app	Not built no recorded artifact row for standalone; native-lane-report.json is absent or records no standalone row for this module	Not built for macOS, Windows or Linux

Parity

browser-js = browser-wasm = vst3 qualified against their own recorded digests. Not recorded: au, clap, standalone.

Signal graph.

Experimental

Migration fallback: approximated from parameter groups, not a runtime wiring diagram.

How it works.

Every noteOn and noteOff has its MIDI note number offset by the sum of semitones and octave×12. The result is clamped to 0–127; notes that fall outside are suppressed entirely. The velocity and timing are untouched.