Seems to be 3 audio assets used for for the music in 5-1. 'abyssalcavedrone', 'abyssalloopfastcalm', and 'abyssalloopfast'. All I have done is upload it to SC.

0:00 abyssalcavedrone (Drone Intro)
0:42 abyssalloopfastcalm (Calm Loop)
2:50 abyssalloopfast (Combat Loop)

enjoy the sax

devilmayquake.com

ULTRAKILL - Deep Blue (has Sax)

Colliding Stars

ULTRAKILL - [Deep Blue] But With EVEN MORE Extra Sax Parts by Rey Hunter

What Would You Do If You Weren't Afraid?

Marzuku - At Ends

This is the track for the second level of Spelunky's series of custom levels in Ultrakill, called "Fraudulence".

Drums are done by Yem
Saxophone is done by Perrell

Artwork: https://twitter.com/ShiniApples

Profaned Community (Fraudulence Soundtrack) [w/ Yem, ft. Saxophonist Perrell]

Art by Alivewake on Twitter

Gluttony 3-3 Fan Track

Metal, Flesh, It's All The Same

Not mine, just here until the official one is for people who wanna groove out to it, art's mine tho

TWISTED GARDEN - Theme of the nameless deity (desc)

This is the soundtrack for "Fraudulence Vol. 1" which is a series of custom levels made by Spelunky for Ultrakill

Artwork by ShiniApples on Twitter/X