How can I nullify SOME but not all of the music?

[Aasokeo]

I'm trying to silence all the active battle music (EXCEPT the Patriarch music) and keep the trader music (all the tracks that play between waves). I've tried replacing the data with silence, but when I play, the game freezes. Is there any way to have silence play during the waves, but have the music play in between waves and during the boss wave? All suggestions are welcome!

EDIT: Also tried replacing the data with a tone; didn't work either.

 

[VoivoD]

I guess they have to have certain length ?
Also are you sure you convert your silence into ogg vorbis ?

 

[Aasokeo]

Yes they were all converted to OGG.
I'm not sure if the length is a factor; I used the Orchestra music pack (which had tracks that were either longer or shorter than the originals) without any problems.