U+1D137 "𝄷" Musical Symbol Ottava Bassa Unicode Character

U+1D137 "𝄷" Musical Symbol Ottava Bassa is a notation mark used in musical scores to indicate that a passage of notes should be performed one octave lower than written. It is visually similar to the numeral "8" placed below the staff, often accompanied by a dashed or solid horizontal line extending over the affected notes. This symbol is part of the Musical Symbols block in Unicode, designed to support precise and standardized digital representation of Western music notation, and it helps musicians avoid excessive ledger lines by simplifying the reading of low-pitched passages.