I updated to 7.50 and this is still a problem. Here is the entire code:

Code:
#include <acknex.h>
#include <default.c>

function main() {
   level_load("TestProject.wmb");

   var music_handle = media_loop("music.mp3", NULL, 50);
   wait(-5);
   media_pause(music_handle);
   media_start(music_handle);
}


As I noted above, if you have a short sound file, you don't even have to call pause/start - the volume will increase after the first loop finishes. It doesn't matter if it's .wav or .mp3.