Render sheet music in your own notation system with Codex
To learn songs on a new isomorphic keyboard, a musician used Codex to build a score-rendering backend on MuseScore with custom note heads that show each note's pitch class as a base-12 number.
Source
jmole on Hacker News · 2026-10-13 · Project link
Written in our own words. Credit to the original author. Link checked 2026-10-16.
What they did
To learn songs on a new isomorphic keyboard, a musician used Codex to build a score-rendering backend on MuseScore with custom note heads that show each note's pitch class as a base-12 number.
Result (as claimed)
Live at music.xy.dev; 85 points on Show HN.
Tools they used
Cost: OpenAI Codex: free plan, paid from $8/mo. Checked 2026-10-14.
Set it up
Collect your inputs
List what goes in (raw footage, script, topic list or audio) and the exact output you want, for example 5 vertical clips under 45 seconds. Put inputs in one folder.
Set up the tools
Open OpenAI Codex, MuseScore. Connect accounts only where needed and note any per-minute or per-credit limits on the free plan before you start.
Run one piece end to end
Make a single output first. Check pacing, captions, voice and framing by watching it on a phone.
Turn it into a repeatable recipe
Save the prompts and settings that worked as a template so the next run takes minutes, then batch.
Review before you post
Watch every output before publishing. Check rights for music, likeness and footage, and label AI content where the platform requires it.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Render sheet music in your own notation system with Codex What the original author did: To learn songs on a new isomorphic keyboard, a musician used Codex to build a score-rendering backend on MuseScore with custom note heads that show each note's pitch class as a base-12 number. Reported result (as claimed by the author): Live at music.xy.dev; 85 points on Show HN. Source: https://news.ycombinator.com/item?id=50075665 Tools they used: OpenAI Codex, MuseScore Category: Creators & video Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Render sheet music in your own notation system with Codex What the original author did: To learn songs on a new isomorphic keyboard, a musician used Codex to build a score-rendering backend on MuseScore with custom note heads that show each note's pitch class as a base-12 number. Reported result (as claimed by the author): Live at music.xy.dev; 85 points on Show HN. Source: https://news.ycombinator.com/item?id=50075665 Tools they used: OpenAI Codex, MuseScore Category: Creators & video Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Render sheet music in your own notation system with Codex What the original author did: To learn songs on a new isomorphic keyboard, a musician used Codex to build a score-rendering backend on MuseScore with custom note heads that show each note's pitch class as a base-12 number. Reported result (as claimed by the author): Live at music.xy.dev; 85 points on Show HN. Source: https://news.ycombinator.com/item?id=50075665 Tools they used: OpenAI Codex, MuseScore Category: Creators & video Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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