I've been getting back into speedrunning and I set up a new layout and tried the sound effects add-on to play a song when I PB (about 3 mins), but its not working when i test it. It works when I use a 5 second sound effect but not for this one song, and the song plays fine in my player. Any help?
Had the same problem, couldn't find any fixes online,
Turns out it's because I was missing windows media feature pack and/or windows media player.
Installing and activating from the control panel did the trick.
For media player just get it from the microsoft app store.
Step 3 on this guide has some screenshots on where to activate the media feature pack:
https://www.thewindowsclub.com/gta-v-error-unable-to-detect-windows-media-player-on-your-system
Here there's a guide on where to download it: (I struggled a bit, had to search for "Add a feature" in the search bar since the option was not there)