U+1D139 "𝄹" Musical Symbol Quindicesima Bassa Unicode Character

U+1D139 "𝄹" Musical Symbol Quindicesima Bassa is a notation mark used in musical scores to instruct the performer to play the indicated notes two octaves lower than written, functioning as the lower counterpart to the more common quindicesima alta symbol. Its name comes from the Italian word for "fifteenth," referring to the interval of two octaves (15 diatonic scale steps), and it appears as a horizontal line with the number "15" positioned below the staff to avoid clutter from ledger lines. This symbol is part of the Musical Symbols block in Unicode, supporting precise engraving of complex piano and orchestral music where extreme register shifts are required without altering the staff notation itself.

General Properties

Code Point	U+1D139
Version Added	3.1
Name	Musical Symbol Quindicesima Bassa
Block	Musical Symbols
General Category	Other Symbol
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	𝄹
HTML Hex Encoding	𝄹
UTF-8 Encoding	0xF0 0x9D 0x84 0xB9
UTF-16 Encoding	0xD834 0xDD39
UTF-32 Encoding	0x0001D139
C/C++/Java Escape	\ud834\udd39

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
Vertical Orientation	Upright
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Other
Sentence Break	Other