A great example of B flat major 7th

The B flat major 7th is one of the best sounding chords on our planet.


It can be found on a few songs:
The Great Gig in the Sky - Pink Floyd
Careless Wisper - George Michael
Supertwister - Camel
Etc


It consists of B flat bass, the 7th interval from bass (or base from the Hellenic βασις) which is 7 natural notes above the foundation B. Ie the note A. The 3rd interval is also taken and usually the 5th too. So it is Bb D F A.


Another fabulous example of B flat major 7th is
Safe in your Arms - Jimmy Simmerville
https://m.youtube.com/watch?v=aY-Efl0nIi4


At the chorus, Safe in Your Arms is sung by the note A. At Arms the bass becomes B flat and the amazing chord is made with the 7th prepared from the previous A notes (Safe A in A your A).


Reference:


Bach Bass Rules
http://normanschmidt.net/scores/bachjs-general_bass_rules.pdf