This property defines the Unicodes which belongs to Byzantine Music block
Characters like 𝀀,𝀁,𝀂, etc. are listed under Byzantine Music Block.
247 Characters are present in Byzantine Music Block starting with the Unicode point U+1D000 that represents the character 𝀀.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.