Some audio clips don't sound when I export a Premiere Pro project

[ninocantando]

Hello!

I'm using the version CS6 (in both Premiere and Media Encoder)

Sometimes I put a voice clip and a music file "one above the other" in a Premiere project, so that they sound at the same time (something like this, don't pay attention to the language haha):

...But my problem is that Media Encoder sometimes makes both of them sound, and sometimes it makes only the voice sound; in the final exported video.

I literally just exported the video twice, and the first time the music didn't sound but the second time it did...

I have no idea what's going on, am I doing something wrong?

Hope you can help me out because this really is a problem, since exporting the video takes quite a long time.

Thanks!!

[Peru Bob · Accepted solution]

Make sure that the music is a wav file, not an mp3 file.  Convert mp3 to wav before importing into Premiere Pro if necessary.

[ninocantando]

Oh, okay... And why's that? What's wrong with MP3 files?

[Peru Bob]

Some (but not all) users have experienced odd behavior when using mp3 files, including playback and export problems.

I have had a few projects where I have not converted mp3s to wav and had problems.  After substituting wav files converted from the mp3s files, the problems were fixed.

[ninocantando]

Hmm... I see... Well, seems I have to do that extra-work converting files...

Thanks my friend! I'll check if this fixes the problem

[Peru Bob]

Please let us know if that fixes it.