SIbM7 chord

Base note: A#
Chord type: major seven
Costruction: 1,3,5,7
Aliases: Bb Major Seven SIb Maggiore Settima Bbmaj7 SIbmaj7 BbM7 SIbM7 A#maj7 LA#7+ A# maj7 LA# 7+ SIb7+ Bb maj7 SIb 7+