Gb7(#11) chord for piano presented by keyboard diagrams.
Explanation: The Gb7(#11) alter the Gb7 by the change of one note. The chord name can also be written as Gb7+11 or Gb7#11.
Theory: The Gb7(#11) are identical with the Gb7 except that a sharpenedThe tone is one half step higher eleventh is added (C). Sometimes the fifth (Db) is omitted.
Notes: Gb - Bb - Db - E - C