Adding audio effects (high pitch, etc) to a video file...

[DVantrease]

I am just getting into video capturing (only done DVD backups), I was playing around with WinDVD Recorder and was having fun with the 'audio effects' feature, specifically raising the pitch so that everyone sounds like a chipmonk. However, it only changes the pitch during playback, it does not change it in the actual recording. Does anyone know of a program that lets you permanently change the pitch of a recorded video? I'd imaging this could be done by demuxing, altering the audio file somehow, then remuxing (and hoping everything stays in sync). I was wondering if there's a program that lets you add effects to the audio without having to manually demux/remux, in other words just tell it what video file and it creates a new video file with the changed audio, or even doing this while capturing.

[drewson99]

I'd imagine that you would run into some synch issues if you chipmunked the voices, but if not you may be able to do that with SoundForge.

[DVantrease]

While playing a video with WinDVD Recorder, you can add audio effects 'on the fly'. Raising the pitch produced very funny helium/chipmunk results, and it stayed in perfect sync the entire time, it just raises the pitch of the voices without actually speeding them up. But it only allows this during playback, it doesn't alter the actual video file. I'll give SoundForge a try.

[bugster]

You are on the right lines. De-mux the audio (as you say) and convert to wav. Now import the wav into any decent sound editor (Goldwave is a good shareware one) and play with it to your hearts content. Just make sure you don't affect the playing time> if you do, adjust it back to the correct length before you save. Now re-encode to your required format (mp2?) and re-mux. Thats all there is to it

[oldsynthguy]

Sound Forge, Wave Lab or more robust Video progs will let you apply DirectX audio effects either as native or real-time. Extract the audio, modify it as desired and save it to a new file to keep your old file intact. In Screenblast/Vegas video products you can apply effects as track inserts and render to a file that incorporates the effects as native to that version to burn while keeping your original project data intact and unaltered. In case you decide at a later date that everyone needs to sound like Darth Vader instead of a chipmonk.

There are a number of DX effects that allowing pitch transform without time transform, several will do multiple harmonies as well as a mix of original content (great for giving characters multiple personalities, in unison), and there are several that offer the ever popular vododer effect.

[DVantrease]

Thanks for the recommendations, I'm going to look at all these programs over the next few days. I was able to do some pitch shifting with GoldWave, but the final file somehow got just slightly out of sync. I'm still trying some things though, this is all new to me. I'm also hoping to avoid having to split the audio off seperatly.