How to change the music to something custom?

[lucasrobin]

Hello,
I already have custom music for the normal theme, but when the timer hits 100 seconds, I want to change the music to a faster version of it with an event. However, it doesn't let me pick which track.
Any help is much appreciated!

[mariobrigade2018]

Someone else had this question, and a solution was proposed here:
viewtopic.php?t=29999