Musical Symbol Combining Tremolo-2 (U+1D168) is a Unicode nonspacing mark from the Musical Symbols block. It resides on Plane 1 (SMP, Supplementary Multilingual Plane), has bidirectional class NSM (nonspacing mark), is not mirrored, and has combining class 1 (Overlay). In HTML it can be written as 𝅨 or 𝅨. Because it is outside the Basic Multilingual Plane, proper font support is required; otherwise a fallback box may be shown.