U+1D145 "𝅅" Musical Symbol Circle X Notehead Unicode Character

U+1D145 "𝅅" Musical Symbol Circle X Notehead is a specialized glyph used in modern music notation, primarily to indicate a specific percussive or indeterminate pitch. It visually resembles a standard notehead but features a small circle with an "X" inside it, distinguishing it from other altered noteheads like the simple X or diamond shapes. This symbol is typically employed in avant-garde compositions, percussion scores, or graphic notation where precise pitch is unimportant, and its meaning can be defined by the composer for effects like struck strings, muted sounds, or rhythmic noise.