happy world music day party. chaotic pianoforte musical grand piano octaves, sketch drawing. doodle pattern with hand drawn

background banner black cembalo chaotic class classic classical clavecin composition concert day design doodle drawing drawn entertainment equipment flyer fun grand hand happy harmony harpsichord illustration instrument jazz key keyboard keys melodic melody mood music musical note octave octaves orchestra party pattern piano pianoforte play school shape sketch sound synthesizer template upright vector vintage wallpaper world