Observed arrival · 2026-09-21

Chord Playground Turns Music Theory Into Something You Can Hear

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Editorial interest 78/100 Selection signal · not a rating of the site

A browser-based chord progression generator and arpeggiator that creates music from a key, scale, and mood.

Landing page captured for the 2026-09-21 issue.

For: Songwriters, producers, and music learners
Worth noticing: It covers 25 scales and modes across all 12 keys, with 28 arpeggiator rhythms and four export formats.

Field notes

The generator combines key, scale or mode, and mood selections before producing a progression that can be heard as an arpeggio. Its stated coverage is unusually broad for a small browser tool: 25 scales and modes in all 12 keys, 12 named moods, and 28 rhythms. The page also says users can view sheet music and export MIDI, MP3, PDF, or PNG files without signing up.

Observed signals

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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