Computer type? OS? What used for playback? More information might help.
Got sound on my computer but if I play a video I get sound but no speech sounds.
I am currently running win 7
Just to add to this I have tried looking at videos on Utube and I am getting background sound but no speech on some but not all of the videos.
I have checked on system info and it says all sound is OK. Is there anything you can think of that might be wrong.