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+1D1AE forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which fingers, keys, or pedals are to be used, whether a string instrument should be bowed or plucked, or whether the bow of a string instrument should move up or down).
Representations
System
Representation (click value to copy)
Nยบ
119214
UTF-8
F0 9D 86 AE
UTF-16
D8 34 DD AE
UTF-32
00 01 D1 AE
URL-Quoted
%F0%9D%86%AE
HTML hex reference
𝆮
Wrong windows-1252 Mojibake
รฐยโ ยฎ
Encoding: GB18030 (hex bytes)
94 32 CC 38
RFC 5137
\u'1D1AE'
Bash and Zsh inside echo -e
\U0001D1AE
C and C++
\U0001D1AE
C#
\U0001D1AE
CSS
\01D1AE
Excel
=UNICHAR(119214)
Go
\U0001D1AE
JavaScript
\uD834\uDDAE
Modern JavaScript since ES6
\u{1d1ae}
JSON
\uD834\uDDAE
Java
\uD834\uDDAE
Lua
\u{1D1AE}
Matlab
char(119214)
Perl
"\x{1D1AE}"
PHP
\u{1d1ae}
PostgreSQL
U&'\+01D1AE'
PowerShell
`u{1D1AE}
Python
\U0001D1AE
Ruby
\u{1d1ae}
Rust
\u{1d1ae}
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