
Fret-O-Matic Dev Blog
Building a Precision Tab Generator engine — from zero to launch
Last updated: 12 July 2026 at 18:57 CEST
Latest Posts
Day 6 — Learning to Hear
Day five had left the engine standing in the right shape and stone deaf. Day six is the day it opened its ears — real key and tempo detection, the pitch-preserving slowdown made good on at last — and the day the project was given a memory it could search.
Day 5 — The First Code
After four days of decisions, plans and laws, Fret-o-Matic still didn't have a single line of working code to its name. Day five fixed that — the engine got its skeleton, and the project finally became something you could run.
Day 4 — The Constitution
With the project newly underway, the obvious move was to start building. Instead I spent the whole day writing the rules the building would have to obey — a constitution, a single source of truth, and the bones of the documentation system that runs the whole operation.
Day 2 — The Day It Got a Name
Day two gave the project the two things a Thursday of pure architecture had left it without: a name, and a price. By the end of it, an idea had quietly become a project.
Day 1 — Four Decisions and a PDF Nobody Asked For
Day one of Fret-o-Matic produced no code at all — and that was the point. It produced a full architectural proposal and the four decisions that everything since has been built upon, all of it written in the span of a single Thursday.