This is the extended original soundtrack, with 21 tracks, including the stunning "Padre Ramirez".
It's hard to know what to say about this: I'm no musical expert, so I can't talk about dissonance and keys. All I know is that the music of Ennio Morricone in this movie is glorious, and has not aged one bit in 45 years. Out of 21 tracks I think there is maybe one which might be considered a dud, and even that might be a matter of opinion. The rest is beyond dispute, ranging from the very good to the sublime. The great thing about MP3 is that I can listen to all these tracks again and again without danger of wearing out a stylus down to the nub!
If you are a teen lad who has no idea what I'm talking about then you should immediately: (a) watch the three Sergio Leone / Clint Eastwood "Dollars" westerns, (b) come back here and buy the soundtrack to the timeless movies you are sure to love.