Reducing noise and normalizing volume.

[fyreboltx2]

I'm not sure if noise is the right term, but I recently downloaded some old Three Stooges videos. While most of them look and sound good, a few of them suffer from background noise, or this hiss that accommodates the audio. Is there a way to reduce it or even get rid of it completely without sacrificing audio quality?

Also, is there a program that'll automatically normalize the volume of some of my MP3s?

[tinker]

Hi
TMPGEnc Xpress has filters for audio. You can download your video to it and fix audio noise. If the noise is little more complex you may have to demux audio and use something like SoundForge to clean it. If it is AC3 stereo you will have to convert it to MP3 or WAV to use it in SoundForge. You did not say what kind of format is your video. Since it was a download I assume it is DivX file.
As for MP3 normalization, most recording software will do that, like ROXIO, NERO and others.

[redwudz]

You could also try the freeware audio editor Audacity. It accepts MP3, Ogg and WAV audio. I use VirtualDub Mod to save out the audio as a WAV with full audio processing, import it to Audacity, filter and normalize as needed, then output as a WAV or a MP3. For MP3, you will need to add the Lame MP3 encoder. But it's all freeware.

If your file is a Xvid, this works well. Just leave VDM open when you are working on the audio, then add the finished audio back in and save both audio and video with Direct Stream Copy. If you want to convert AVI type files to MPEG for a DVD, then you can have Audacity output as a WAV and use ffmpeggui to convert it to AC3 audio for the DVD format.

[rkr1958]

Goldwave. But you'll need to convert everyting to wav first.