Possibly the best ever major 7th chord presented to the human brain

Chi Mai - Ennio Moriconne
https://m.youtube.com/watch?v=DbHP9NtSnB0#fauxfullscreen


At 4:51


Key is F sharp minor. Ie F, G, C are sharp.


Violins keep playing F ie F sharp since


4:25


At 4:25 bass starts to descend step by step


4:25 bass F melody F   (Remember all F are sharp)
4:28 bass E melody F
4:32 bass D melody F
4:36 bass C melody F   (Remember all C are sharp)
4:39 bass B melody F
4:43 bass A melody F
4:47 bass G melody F   (Remember all G are sharp)
4:51 bass G natural melody F ie G major 7th
4:54 and Bach to tonic ie Bass F melody F




Note the 3rd with respect to bass is almost always added by some other instrument in order to make every disconant interval sound amazing.


See also Bach Bass Rules:


https://normanschmidt.net/scores/bachjs-general_bass_rules.pdf