Is there a way to change an audio tracks tempo after recording ?

Audio snap does this with great results Norrie. There are a bunch of videos on audio snap, but audio snap is the tool you need.
Cj

Hi Norrie
Good to see your still posting.
 
CJ is offering good advice… Wow! My first post for the year and I’m agreeing with CJ, looks like it’s going to be a strange year indeed.
 
FWIW My I talk about my own pain and suffering with regards to tempo once a song instrumentally is close to completion! I like what I here Right! I can’t wait to lay down the vocals. I start recording and what I thought would be easy to sing at selected tempo is impossible. I stumble and splutter as if I’m on my second bottle of red.
 
In your post you said “The tempo feels just a little to fast when I sing over it” Now here is a question for you.  And firstly let me say that I believe you are competent and talented person. Is it to fast or have you not learnt you vocals well enough to sing at 180bpm. My experience on a bunch of songs is just that. I did not work hard enough at pronunciation and my lack of articulation and intonation brought me unstuck. And this is where my pain and suffering started. I convinced my self I needed to reduce tempo 5bpm or more, spent hour’s friging around with it, singing at different tempos to discover that the original tempo was right. Why I did not trust myself is beyond reason. This has happened to me on more songs then I care to admit. So I wont.
 
So if I may suggest to you.
Firstly bounce all tracks down to one track.
Hold down control and drag the end of the clip in. unfortunately readout is in percentage and not bmp
Now frig around with it, Sing It Sing It Sing It…  and bear in mind that you may find after trying many many tempos that you now have become accustomed to the song well enough that the original tempo hits the Goldie-locks order. That is to say not to hot and not to cold or not to fast and not to slow.
 
Q. Why is music so hard to get right?
A. Because if it was easy it wouldn’t be so rewarding
 
 
I wish you well and hope my reply helps you. Happy New Year to you and all forum members… GlennP

My advice is to back up the entire project before working audiosnap.  You want to be able to get back to where you started from and not worry about experimenting.  Be sure to copy all your audio into the back up folder. 
 
The process should be something like:
1.  Set the project tempo to the desired beat, i.e. 170-175
2.  Enable audiosnap in the audio clip.  Dicker with the threshold, move the transients, ect. till you have the transients on the desired beats. 
3.  Hit the clip follows project button.  The transients should be somewhat lined up with the time ruler. 
4.  Clean up the loose ends.
 
Hope it works out.  I would love to hear how you make out with it.  I've been trying for a while to get a better handle on audiosnap and find how it works for other people.
 
-Mike