Db Major 7th sharp 11th chords Db Major 7#11 on a piano Formula: 1-3-5-7-#11 Notes: Db-F-Ab-C-G chord suffix: DbMaj7#11 Use these charts to create your own DbMaj7#11 chord or play a DbMaj7#11 melody. Db Major 7#11 on a pianoDb Major 7th sharp 11th chord on a guitar