ブログ

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 single taut length of old natural rope straining over the edge of a worn wooden block, its fibres fraying and starting to part at the point of greatest tension, a small brass guitar tag tied to it, warm golden light
2026年6月30日6分で読めます

Where Even a Good Chord Finder Breaks

Every chord finder nails an open C. Push past beginner shapes into altered dominants and slash chords and some return "no chord found." Here is where they break.

fretscapeguitarreverse-chord-lookup
A brass wax seal resting beside a single blob of warm red sealing wax freshly stamped with a small guitar emblem on aged paper, several blank unsealed sheets nearby, golden light
2026年6月29日8分で読めます

What Makes a Good Chord Identifier?

A rubric for judging any reverse chord lookup - check it yourself in 30 seconds. Plus a blind test where two independent AIs scored seven tools against theory.

fretscapeguitarreverse-chord-lookup
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

まだご質問がありますか?

すぐに答えが欲しい場合は Fretscape Assistant にチャットで質問するか、サポート方法やナレッジベースを案内しているヘルプページをご覧ください。

ヘルプを見る