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Life & fun · June 10, 2026

MotifKit

Musical idea to full MIDI orchestration - fast

Visit motifkit.com ↗Alternativestop 9% of June 2026

What it does

MotifKit helps you turn musical ideas into full MIDI orchestrations. Start with a chord progression, sketch it in a piano roll, layer ostinato patterns, then split your part into orchestral voices and export multi-track MIDI straight into your DAW. Free, browser-based, no install.

Does the same job

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    I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.

  • IB
    I built a WebMIDI sequencer to control my hardware synthsDec 2025 · simplychris.ai · ▲43

    Hey HN, I’m an ex-Google engineer trying to get back into music production. I needed a way to sequence my hardware synths using AI contexts without constantly switching windows, so I built this. It runs entirely in the browser using WebMIDI. No login required. It connects to your local MIDI devices (if you're on Chrome/Edge) and lets you generate patterns. Tech stack: [React / WebMIDI API / etc]. Link: www.simplychris.ai/droplets Code is a bit messy, but it works. Feedback welcome.

  • ChordViz23d ago · chordviz.ca · ▲75

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    ShevtoneAudio Orchestrator – Turning MIDI into Full Orchestration7d ago · orchestra.shevtoneaudio.com · ▲6

    Hi HN, I'm Bor Shev, a composer and developer. Over the past two years I've been developing ShevtoneAudio Orchestrator. The idea is simple: instead of generating a finished piece of music and replacing the composer, Orchestrator takes the composer's own MIDI and develops it into a full orchestration. It analyzes the musical material — harmony, melody, rhythm, dynamics, structure and orchestral density — and creates an arrangement across strings, brass, percussion and other sections. The important part is that the result remains editable MIDI. The composer keeps control and can continue…

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