Content creation Β· Do this yourself

Use AI to build a custom tool for your own niche hobby or job.

βœ… He says it has been pretty helpful for learning new music.

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Who it’s for

Musicians and anyone with a very specific need.

Adapt it to your industry

  • Restaurant: short videos of dishes with captions
  • Coach: turn one talk into clips, posts and a newsletter
  • Agency: produce first drafts for clients faster

Step by step

  1. Pick one repeatable format (a 30-second tip video, a weekly post, a product image).
  2. Open ChatGPT, Claude or Grok and paste the prompt below with your topic.
  3. Ask for 5 scripts or drafts, then pick the best one.
  4. Make the visuals in Canva, CapCut or an AI image/video tool, using only material you have the rights to.
  5. Edit the result so it sounds like you and check facts.
  6. Post it, then reuse the same template for the next piece.

Ready-to-copy prompt

Extend MuseScore rendering so each note head shows its pitch class as 0-9, X, Y. Convert this MusicXML file and output a PDF.

Start with AI

Opens the AI with this guide and the prompt filled in.

Cost
$0–20/month (free tiers or one AI plan)Our estimate
Time
1–2 weekendsOur estimate

How to make money from it

Pricing idea: Sell content packages (for example a set of short videos a month) or a subscription app if you build a tool.

Finding your first 10 customers

  • Make 3 free samples for businesses you like.
  • Post your work daily for 2 weeks.
  • Offer a simple monthly package to people who comment or ask.

Ideas, not promises. Results vary.

Details: source, numbers and tags

What they did

jmole plays a new isomorphic keyboard with base-12 notation and used Codex to build a score-rendering backend on MuseScore with note heads showing each pitch class.

How it went

He says it has been pretty helpful for learning new music.

Worth knowing

Building on an existing engine (MuseScore) beat writing a renderer from scratch.

Difficulty
IntermediateOur rating
Time to build
Not reportedOur estimate
Monthly cost
Not reported
Revenue
Not reportedWe only show revenue the source states
Engagement
83 HN points79 comments Β· fetched Oct 15, 2026
X buzz
No X data

Original builder recipe

  • Codex
  • MuseScore
  1. Pick a repeatable format.
  2. Let the agent generate drafts or assets from your inputs.
  3. Edit and check facts and rights before publishing.
  4. Reuse the template for the next piece.

Tags

Agent Codex
Industry Music

Read the original

More ideas like this

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Sell an AI song-making app on mobile

A mobile app turns ideas into original AI songs, sold by weekly and yearly subscription.

πŸ’° $22,888 MRR, verified via RevenueCat on TrustMRR (synced 2026-10-15)Advancedby Anonymous founder

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