If you want the pitch to change (to the speed of the clip), right click the audio event and click properties. Under time stretch/pitch shift, check the box "Lock to stretch" next to pitch change.

Yes . . but I was trying to establish "where" the echo was coming from - yes?

Grazie

ok the lock to stretch fixed my echo problem. is there anyway i can put that on by default?

Excellent! Default? I wouldn't have thought so. Are you doing a lot of this type iof work? MAybe there is a simpler solution - I'd wouldn't want this as default . .. . can't think why you would want this by defualt? PLease explain?

Grazie

yes ill be doing a lot of slowing down and speeding up and i need the audio to sink up with out any echo, so yes, default would be nice

Unless I misread, you ONLY want to slow down the video?

If that's what you want, assuming the video and audio tracks are part of one source file begin by right clicking on the video then, group, remove from. In this simple way you can strech the video portion out without impacting the audio.

If you want the scene to stay at the original time span length (whatever time it spans on the timeline) while slowing down or speeding up the video, you can do that too. Instead of stretching the video on the timeline, insert a velocity envelope. Click on the vid on the main timeline, then from Insert, Video Envelope, pick Event Velocity. Caution. Break your project into events. You only want to apply the effect to an event, for example 20 seconds, not the entire project. Now double click on the envelope (line going across the track) wherever you wish to insert control points, then drag up and down to speed up and slow down the speed. Unlike stretching out a frame, no frames are added or removed, so the audio portion remains as it was, yet the video portion will play slower or faster depending on the control points on the envelope.

I'm pretty sure he wants to slow down the audio as well. If you want it as default where there's no echo (the audio gets lower), under options go to preferences, editing, and uncheck the box that says preserve pitch when stretching audio events.

OK, if you want to slow down or speed up music more than a little bit, there's special purpose software for that. I don't remember if Sony's audio tools they picked up from SonicFoundy do it well or not, never really used it much. What you can do from Vegas directly with audio stretching is pretty good, but somewhat limited.

One pretty good example I've heard is called Slow down, but I originally heard it on a Mac, but its also supported on Windows. One of the things you can do with this applicaiton is take audio from a CD track, change pitch, speed, apply various effects... all in real time as the audio plays until you get it as you want.

PLEASE lets not turn this into another copyright rant thread. Only offering solutions. I just downloaded a sample myself to play with it, and almost fell out of my chair laughing, hey it works GOOD if you want to mess around with some of the classics for example. Just for fun I tried it with Rock Around the Clock, oh my goodness.

http://www.ronimusic.com/

If you have Sound Forge, this is easy, if you don't, then use a combination of CTRL+Drag and pitch shifting to get a good sound. No musical file will stretch past about 25% without getting a somewhat weird. Vegas has as good resampling tools as anyone, but with Forge, you can also apply pitch bends. Forge can also simulate VSO.
If you turn on Windows Recorder, you can play a file back in Vegas, and use the shuttle knob/rate control to slow down audio, and Windows Media recorder can record it, then drop the file bak onto the timeline.

I recently tried Ctrl/Drag to change the duration of a voice over sentence, and it sounded a bit different, but someone suggested trying the Vegas Time Stretch audio FX, and this achieved the duration change and still sounded fine.