Can you be more specific about what you mean by "bad"? Is it too quiet? Too loud and distorted? Does it sound like it's being played through tiny speaker?
If you're hearing distorted sound, it could be that it's overmodulated. Open the Audio Mixer from under the Tools menu and play your clip. Is the audio level peaking between -6 and 0 or is it peaking in the red?
Can you post a sample of your clip to YouTube and link to it so we can hear how bad it is?