In Brush Portfolio I have found this collection of 24 brushes about musical notes and instruments where the trumpets, saxophones, guitars and musical notes with the treble clef to the head.
The brushes have been created with Illustrator by Susan Libertiny, they have a resolution of 300ppp, the entire pack weighs about 3.5 megabytes
Download | 24 musical instruments and notes brushes
Alternative download | 24 musical notes and instrument brushes