Also known as ♮, ♮-sign
musical sign (accidental) cancelling previous accidentals returning the frequency of the note to the natural/original value
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An A natural, then A♭.
In modern Western music notation, a natural (♮) is a symbol that cancels a previous sharp or flat in the written music. It indicates that the note is at its unaltered pitch.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).