Upon initial launch of Halo MCC, I had forgotten to plug in my headset after moving around. As such, I plugged the headset in while selecting a campaign mission for ODST. Once plugged in, I found that there was no menu screen music.
Selection SFX and loading notifications worked fine as I started up. On top of that, the sound continued with the same issues once loaded into the mission. When watching the initial cutscenes, there is no sound. Once loaded in and moving around, there are no sounds for the actual game. Menu SFX and Loading sounds were still available, but you could not hear any gunfire or ambient noise.
Not even the music, which is one of my favorite parts for ODST, worked upon loading of the mission. Although this issue did not persevere upon relaunching the game, I figured I should let the team know about this in case it might lead to further issues for someone down the line.
Thanks for putting such great content on PC now!!!