Source: Noto Music

U+1D1A9 Musical Symbol Degree Slash

U+1D1A9 was added in Unicode version 3.1 in 2001. It belongs to the block U+1D100 to U+1D1FF Musical Symbols in the U+10000 to U+1FFFF Supplementary Multilingual Plane.

This character is a Other Symbol and is commonly used, that is, in no specific script.

The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. The word that U+1D1A9 forms with similar adjacent characters prevents a line break inside it.

The Wikipedia has the following information about this codepoint:

Niente (Italian pronunciation: [ˈnjɛnte]), also called quasi niente [ˈkwaːzi ˈnjɛnte], is a musical dynamic often used at the end of a piece to direct the performer to fade the music away to little more than a bare whisper, normally gradually with a diminuendo, al niente. It is often written as "n" or "ø". It is also used to direct the performer to fade into a note without any articulation at the beginning of the note, known as dal niente (from nothing): "n".
Niente is distinct from a rest "in that [during niente] the musician is engaged in making sound, but so softly that the sound can not be heard."

Representations

System	Representation
Nº	119209
UTF-8	F0 9D 86 A9
UTF-16	D8 34 DD A9
UTF-32	00 01 D1 A9
URL-Quoted	%F0%9D%86%A9
HTML hex reference	𝆩
Wrong windows-1252 Mojibake	ð†©

Elsewhere

Complete Record

Property	Value
Age (age)	3.1 (2001)
Unicode Name (na)	MUSICAL SYMBOL DEGREE SLASH
Unicode 1 Name (na1)	—
Block (blk)	Musical Symbols
General Category (gc)	Other Symbol
Script (sc)	Common
Bidirectional Category (bc)	Left To Right
Combining Class (ccc)	Not Reordered
Decomposition Type (dt)	none
Decomposition Mapping (dm)	Musical Symbol Degree Slash
Lowercase (Lower)	✘
Simple Lowercase Mapping (slc)	Musical Symbol Degree Slash
Lowercase Mapping (lc)	Musical Symbol Degree Slash
Uppercase (Upper)	✘
Simple Uppercase Mapping (suc)	Musical Symbol Degree Slash
Uppercase Mapping (uc)	Musical Symbol Degree Slash
Simple Titlecase Mapping (stc)	Musical Symbol Degree Slash
Titlecase Mapping (tc)	Musical Symbol Degree Slash
Case Folding (cf)	Musical Symbol Degree Slash
ASCII Hex Digit (AHex)	✘
Alphabetic (Alpha)	✘
Bidi Control (Bidi_C)	✘
Bidi Mirrored (Bidi_M)	✘
Composition Exclusion (CE)	✘
Case Ignorable (CI)	✘
Changes When Casefolded (CWCF)	✘
Changes When Casemapped (CWCM)	✘
Changes When NFKC Casefolded (CWKCF)	✘
Changes When Lowercased (CWL)	✘
Changes When Titlecased (CWT)	✘
Changes When Uppercased (CWU)	✘
Cased (Cased)	✘
Full Composition Exclusion (Comp_Ex)	✘
Default Ignorable Code Point (DI)	✘
Dash (Dash)	✘
Deprecated (Dep)	✘
Diacritic (Dia)	✘
Emoji Modifier Base (EBase)	✘
Emoji Component (EComp)	✘
Emoji Modifier (EMod)	✘
Emoji Presentation (EPres)	✘
Emoji (Emoji)	✘
Extender (Ext)	✘
Extended Pictographic (ExtPict)	✘
FC NFKC Closure (FC_NFKC)	Musical Symbol Degree Slash
Grapheme Cluster Break (GCB)	Any
Grapheme Base (Gr_Base)	✔
Grapheme Extend (Gr_Ext)	✘
Grapheme Link (Gr_Link)	✘
Hex Digit (Hex)	✘
Hyphen (Hyphen)	✘
ID Continue (IDC)	✘
ID Start (IDS)	✘
IDS Binary Operator (IDSB)	✘
IDS Trinary Operator and (IDST)	✘
IDSU (IDSU)	0
ID_Compat_Math_Continue (ID_Compat_Math_Continue)	0
ID_Compat_Math_Start (ID_Compat_Math_Start)	0
Ideographic (Ideo)	✘
InCB (InCB)	None
Indic Mantra Category (InMC)	—
Indic Positional Category (InPC)	NA
Indic Syllabic Category (InSC)	Other
Jamo Short Name (JSN)	—
Join Control (Join_C)	✘
Logical Order Exception (LOE)	✘
Math (Math)	✘
Noncharacter Code Point (NChar)	✘
NFC Quick Check (NFC_QC)	Yes
NFD Quick Check (NFD_QC)	Yes
NFKC Casefold (NFKC_CF)	Musical Symbol Degree Slash
NFKC Quick Check (NFKC_QC)	Yes
NFKC_SCF (NFKC_SCF)	Musical Symbol Degree Slash
NFKD Quick Check (NFKD_QC)	Yes
Other Alphabetic (OAlpha)	✘
Other Default Ignorable Code Point (ODI)	✘
Other Grapheme Extend (OGr_Ext)	✘
Other ID Continue (OIDC)	✘
Other ID Start (OIDS)	✘
Other Lowercase (OLower)	✘
Other Math (OMath)	✘
Other Uppercase (OUpper)	✘
Prepended Concatenation Mark (PCM)	✘
Pattern Syntax (Pat_Syn)	✘
Pattern White Space (Pat_WS)	✘
Quotation Mark (QMark)	✘
Regional Indicator (RI)	✘
Radical (Radical)	✘
Sentence Break (SB)	Other
Soft Dotted (SD)	✘
Sentence Terminal (STerm)	✘
Terminal Punctuation (Term)	✘
Unified Ideograph (UIdeo)	✘
Variation Selector (VS)	✘
Word Break (WB)	Other
White Space (WSpace)	✘
XID Continue (XIDC)	✘
XID Start (XIDS)	✘
Expands On NFC (XO_NFC)	✘
Expands On NFD (XO_NFD)	✘
Expands On NFKC (XO_NFKC)	✘
Expands On NFKD (XO_NFKD)	✘
Bidi Paired Bracket (bpb)	Musical Symbol Degree Slash
Bidi Paired Bracket Type (bpt)	None
East Asian Width (ea)	neutral
Hangul Syllable Type (hst)	Not Applicable
ISO 10646 Comment (isc)	—
Joining Group (jg)	No_Joining_Group
Joining Type (jt)	Non Joining
Line Break (lb)	Alphabetic
Numeric Type (nt)	none
Numeric Value (nv)	not a number
Simple Case Folding (scf)	Musical Symbol Degree Slash
Script Extension (scx)
Vertical Orientation (vo)	U