Can please convert ogg encoders to wave and name playlist accordingly?--It is -- my mistake. Some were able to get Windows 11 working, some no audio. Maybe a windows 11 registry problem, audio works on wine-linux. I forget you may have been able to play some tracks on a cd music player with the original game cd from track 2 on or up until the last one. The composer may have been Bill Brown. Don't know if there was an OST?

This version has both ogg and wav files for music. Users may have problems with winmm and cd audio on 32-bit and 64-bit Windows 10-11.
Example locations: C:\Program Files\RedStormEntertainment\Tom Clancys Rainbow Six\data\sound\Music wav ; C:\Program Files\RedStormEntertainment\Tom Clancys Rainbow Six\MUSIC ogg
As a workaround you could play the music files from a pc music player in the background.

Windows 11 R6 audio music fix

https://github.com/dippy-dipper/ogg-winmm/releases/tag/v0.2.0.2
replace files except for readme in main directory.
rename winmm.dll to wincd.dll after backing it up

rename the single instance of the word winmm.dll to wincd.dll in RainbowSix.exe with Notepad++ after backing the exe up

Trusted Installer info: C:\Windows\SysWOW64
winmm.dll possibly blocked