Powerful Camera Flash Overpriced The Sound On My Camera Isn't Clear?

The sound on my camera isn't clear? - powerful camera flash overpriced

I am a commercial for a school project me and my friend and the sound is clear. Not "M going to change in Windows Movie maker.Is there a way to make it clearer? I use a simple digital camera.It ol 's pentax.On front reads: 7.1 megapixels, 7.1 MP, 3X optical Zoom, high sensitivity of ISO 3200, powerful flash and LCD2 5 inches, if using.