Observed arrival · 2026-08-27

PartWrite Harmony Lab, the SATB bench

partwriteharmonylab.site Observed source

Editorial interest 84/100 Selection signal · not a rating of the site

An iOS-focused music-theory workspace for writing four-part harmony, checking voice-leading, studying figured bass and species counterpoint, and hearing the result.

Landing page captured for the 2026-08-27 issue.

Field notes

The described workflow combines a color-stemmed SATB staff, pitch and duration controls, range shading, and a rules engine that opens readable correction hints for specific voice-leading errors. Users can begin with one of more than 30 figured-bass lines, reveal a model overlay, or practice five species against a cantus firmus. The page also claims on-device SwiftData drafts, selective voice playback, A440 sound, and PDF/PNG export.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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