This particular icon features a shape that looks like a music note that you would see in a music book or on a sheet of music. There are no other shapes around the music note.
This Musical icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.