Audacity Forum

Did everything you said all perfect works on my home system plays in windows media player and audacity.

knuckles wrote:na i haven't inverted one of the tracks.

Maybe YouTube converts stereo to mono to save bandwidth in some display options ...
https://encrypted.google.com/search?q=y ... mono+sound

or only converts one channel on the video ...
http://superuser.com/questions/351249/f ... hannel-aud

Is there no other way I can fix this problem?

As we can't hear the file and cannot examine it, we can only guess at what the problem might be.
Do other files work correctly? Is it just this one song that has the problem? Where did this song come from?

Yh other songs work perfect only this song and where it came from I recorded it at my friend house.

As an experiment, what happens if you convert the song to mono (Tracks menu > Stereo Track to Mono)?

When I put it in mono it blanks out I get no vocals just the beat

Then your vocals have inverted phase in one channel.
Do you still have a multi-track copy with the vocals on a separate track from the beat?

No I don't think so how do I check if I do have one or not?

@knuckles,
Did you ever do a "File > Save Project" or "File > Save Project As" whilst working on this song? If so, you need to find the .aup file that Audacity created and open that file into Audacity. If you never did either of those then you almost certainly don't have the necessary multi-track file that Steve mentioned.