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Fretscapeの開発から生まれた物語。動きを考えるギターツールを形作る、小さな判断の積み重ね。

A vintage brass compass resting on aged sheet music, its needle settling toward a marked point, with a faint pencilled question mark nearby
2026年6月9日4分で読めます

What Key Is This Progression Actually In?

Most key finders match scales and give you a confident-looking answer. Fretscape asks what the progression actually suggests - and tells you how sure it is.

fretscapeguitarkey-detection
A row of blank kraft-paper tags hanging from twine on wooden pegs against dark rustic wood, one tag embossed with a small acoustic guitar, warm light
2026年6月8日6分で読めます

The Wrong Name, Ranked First

Hand a reverse chord lookup three notes and it leads with C6(no3) over the obvious Am7 - then warns about its own answer. Lookup isn't the problem. Ranking is.

fretscapeguitarreverse-chord-lookup
A small wooden three-tier winners podium on a warm desk, a blue first-place rosette ribbon resting on the second-place step while the tallest top step sits empty, golden light
2026年6月7日7分で読めます

Technically Correct Isn't The Same As Expected

I was taking a screenshot of Am7 when I realised my ranking had been getting it wrong for months. The voicings were correct. The order wasn't.

fretscapeguitarchord-voicings
A kraft tag held shut by a small brass padlock among looser tags on warm wood, a faint chalk arrow curving past it rather than stopping at it
2026年6月6日6分で読めます

The Optimiser That Was Quietly Ignoring Me

I sat down to take one screenshot for the Play Store. Three hours later I'd fixed three bugs in the optimiser - and was very late for a family day out.

fretscapeguitarprogression-optimiser
An aged route map on a warm wooden desk, two points joined by a scribbled-out path and a cleaner redrawn line, brass dividers resting beside it
2026年6月5日7分で読めます

I Built a Chord Optimiser That Proved Me Wrong

I was sure Fretscape had picked the wrong F fingering. Twenty years of guitar instinct told me so. Then I looked closer - and the optimiser was right.

fretscapeguitarchord-voicings
Vintage brass balance scales on warm wood, one pan holding a bright coin and the other a small guitar-shaped token that tips the balance lower, golden light
2026年6月4日3分で読めます

How Fretscape Thinks

A short intro to a five-part series about the small decisions that built Fretscape. The easy answer and the right answer aren't always the same.

fretscapeguitarproduct-building

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