U+1D1B9 "𝆹" Musical Symbol Semibrevis White Unicode Character

U+1D1B9 "𝆹" Musical Symbol Semibrevis White is a notation symbol used in early music, specifically belonging to the category of mensural notation from the Medieval and Renaissance periods. It represents a white or open notehead, which in that historical system typically indicates a long or double whole note value, often serving as a precursor to the modern whole note. This glyph is part of Unicode's Musical Symbols block, which was designed to encode a wide range of historical and modern music notation characters for digital text and typographic use. Unlike the more common filled noteheads used in contemporary music, the Semibrevis White retains its historical form, allowing scholars and musicians to accurately reproduce and typeset scores from the 13th to 16th centuries.