DonutsDelivery Releases Arbit Open Beta - Free Harmonic Composition Workstation and VST3/CLAP Plugin

Donuts Delivery has released Arbit in open beta for Windows, macOS, and Linux.

Arbit is a piano-roll-first composition workstation and MIDI plugin where notes can be linked by harmonic ratios. Instead of treating every note as a fixed equal-tempered grid position, Arbit lets composers define relationships such as 3/2, 5/4, 7/4, and other harmonic intervals directly between notes. Linked notes retune automatically as the composition changes.

Pricing & Availability

Arbit runs as a standalone app and as a VST3/CLAP plugin for macOS, Windows and Linux.

The free tier includes the harmonic piano roll, per-note microtuning output through VST3 note expressions, CLAP note expressions, and MPE, SF2/SFZ instrument support, VST3 hosting, Airwindows effects, core DAW functionality, MIDI import/export, Lua Scripting and in-depth chord/composition tools.

Arbit Pro adds sampling, drag-and-drop sample-to-note workflows, monophonic audio pitch correction, World vocoder / harmonic audio transformation, DiffSinger singing voice synthesis, and UTAU support.