I've seen this discussed in former posts, but none of the answers have worked for me. I use GZDoom Builder and SLADE3, and I play Doom in GZDoom. I am trying to use an MP3 file for music in SLADE3, but whenever I place it, even named as D_RUNNIN, it only sees it as a "Sound (MP3)" file, thus it is not recognized as music. If I try using a MIDI, the music doesn't sound proper. Is there a solution to this problem, other than placing a huge sound emitter in the map? (Yuck)