In music, four note group patterns, alternately called "four-note digital patterns"[1] or simply "four note patterns", are one of many ways to formulate improvised solos in jazz.
"Four-Note Grouping is an improvisation technique that uses major and minor triads along with specific passing notes as a means of generating lines.
The concept of Four-Note Groupings lets the lines be more 'out' and stretch the possibility of available notes over a chord due to the structural integrity of the triad-based line.
"[2]