You can change the speed of an audio event by holding down ctrl and dragging the edges (the icon will show a squiggley line under the cursor)
You may have to go into the properties of the audio event and uncheck "Pitch change: Lock to stretch" or similar setting depending on the version of Vegas (I'm on 5)
If you want to slow down an entire Vegas project, I would simply render it to a single file and bring that into a new project and stretch it using this method.
I've not tried this, but maybe in Vegas 6 you can manipulate it the same way as a nested project object.
I use this to bpm my mp3s for Serato Scratch and it works incredibly. Won't help you mix the song together, but will definitely help you understand what will and will not work together. You'd actually be best off using Acid which would make the whole project much easier
I should have been a little more clear. Beatmeister is really great because you just point the program where your wave, mp3, etc reside and it auto bpms the files incredibly quickly and accurately. No goofy taps on the mouse to try and get it right. Freeware... check it out
Wierd .... I downloaded this program, it looked pretty cool ....
Not knowing what I was doing, I clicked on the folder and selected a drum-tracks folder which had all of the individual tracks of a drumset from multitrack recording session of a song; IE: kick, snare, hats, tom1, tom2, tom3, O-Hleft & O-Hright. These eight individual tracks are of the same drumset playing the same performance....
Well the program started processing BPMs and to my surprise, each track of the same drumset playing the same performance had a different tempo...
:)))
I thought that was really funny ... maybe if he wouldn't have played to a click track .... Hmmmmm