How PianoGrid separates source-backed music facts, editorial examples, evidence limits, and correction work.
PianoGrid uses named educational, publisher, manufacturer, standards, and institutional sources when a page needs external support. A source is cited for the facts it actually supports; a citation is not treated as an endorsement of PianoGrid.
Where the source does not specify a detail, PianoGrid keeps that boundary visible. For example, a source may support chord tones and root-position fingers without supporting PianoGrid’s chosen octave placement.
Pitch spelling is preserved when the written note name matters, even when two spellings share a physical key. Finger numbers, scale degrees, MIDI numbers, piano-key numbers, and octave labels are treated as different systems rather than interchangeable numbers.
PianoGrid does not infer an unverified fingering, convert a one-octave fingering into a two-octave fingering without evidence, or label an editorial keyboard placement as though a source specified that exact register.
For third-party arrangements, PianoGrid records the named edition and its provider and links to the provider instead of implying that PianoGrid hosts the score. Access conditions can change, so users should confirm the current terms on the provider’s page.
If a music fact, source link, access condition, or tool behavior looks wrong, report the exact PianoGrid URL, the disputed statement, and supporting evidence. Corrections should change the public claim only as far as the evidence supports.