I’m trying to figure out how to slow down music in Sony Vegas then speed it up to make it appear like I’m moving fast. Sort of like how people be doing in the app Musical.ly?
Example!
You see how they’re are all moving fast? How do I achieve this effect?
Try this
This could you do using Audacity and Vegas combining different techniques.
The first thing you have to try how ctrl-drag works. This is, when you drag an events start or end while you press ctrl on the keyboard. This way the audio is affected too, and you can achieve 25%..400% playback rates.
Go, try it!
The second thing you have to get familiar with is velocity envelope. You can add a velocity envelope to a selected event by click "insert" then, "video envelopes" then event velocity. A green line appears, that represents the velocity envelope. Double click the line somewhere, it will create a point. You can move that point upwards to 1000% and downwards to -100% (reverse playback).
You can have more points, so start with 100%, and add another point and drag it up to 1000%. Try it and see!
Unfortunately this does not affect audio. The gradual speed up you can do in Audacity, for that you need the "sliding stretch". Hint: start at 0% tempo change, and for a spiinig up effect you also have to set the pitch change at the end, not just tempo change.
Go, figure, try it, experiment!
Update: j-v was quicker, while I was typing it.
Another way (inside Vegas Pro) is to use "élastique Timestretch" as Track FX and use Automation to apply an audio speed ramp.