Hey guys, 
 
            I do mostly audio recording and have never messed with loops, samples etc.  I record my band, other bands etc.  mostly guitar, bass, vocals, & drums (I track the midi info from an actual drummer on my Roland V kit & send through either session or easy drummer).   I have a recording where the whole band played & I have separate scratch tracks for 2 guitar parts, a bass guitar track, & a vocal recorded from my PA board.  Generally I track a band this way, and aim to get a solid drum track down (recording only the midi performance of the drums) and scratch for everything else which we re-track later.
   
      We went to go back and start that process and realized the drummer slowed down a bit going into each verse & it steps back up in the pre-choruses.   It's not horrible but enough that it will bother me. I know we could go back and re-track it but I also know there is a way to correct these timing fluctuations with audio snap...  I am a total newb when it comes to setting up the transient markers etc. so I need you to know that when you give any advice you have to offer.    In addition, because I didn't not use the internal metronome I never moved the tempo for the project from the default 120 bpm, which the song is not in so I don't know how that may effect this process either.   

  Thanks in advance for any hints, tips, and techniques fellas.

So, the whole band slows down together, right? If so, this should do the job:

1. Save a copy of your project with a new name so you have a backup of the original... just in case.   
2. You'll need to edit the tempo map of an existing audio track... Preferably a percussion track. Look for one with clear "hits" that occur right on the beat, through as much of the song as possible.  If there are multiple clips on the track you choose, bounce to a new one using the "Bounce to Tracks" command, and use that new track.  (You can delete this new track when you're done, if you want).  Another excellent way to get a clean percussive audio guide of the tempo would be to record yourself clapping quarter notes along with the track.
3. Edit the tempo map by opening the AudioSnap palette (Type the A key).  Select the clip you're using and click the "Edit Clip Map" button on the palette. 
4. You'll see a bunch of beat markers at the top of the clip.  CTRL+Drag them to the appropriate locations .  So, what you hear/see as beat one measure 4 should have the "4:1" mark mapped to it.  Do this through the whole track.  (Holding the CTRL key while making your changes will make upcoming markers "adapt," saving you work as you scroll through)
5. With the clip still selected, push the "Set Project From Clip" button (for best results use the "Beat" setting).  Doing this won't change the content at all.  It will only adjust the project tempo map to match what you just set up on that clip. (This will, however, affect MIDI, so "Lock" all of your MIDI clips before doing this.)
6. At this point you need to get the project to follow the tempo changes.  Do this by enabling the "Clip Follows Project" button.  Make sure "Auto-stretch" mode is selected. 
7. Go to the tempo view, delete all but the first tempo change.  Set that tempo change to 120. This will make the whole project play at 120.  If you want some tempo variations, insert new tempos manually or draw them into the tempo view.  (Note: you will want MIDI data to be impacted by this change, so it stays in sync with your audio... so "unlock" the MIDI clips before performing this step)
8. When you're done, select everything and bounce to clips (it'll sound better after bouncing, as it will use "Radius" stretching, rather than the real-time alternative).

I made a video that goes through the steps: http://screencast.com/t/xhfVsslPn20h  - It's a highly "abridged" version of what you will do - but should help.

Let us know how your results are, or if you have questions, etc. 

**Reformatted for clarity  

Thanks Bill, I will try this later tonight (hopefully... if I get the time to)
 
Yes the whole band slows down together.  

So when I am done I select all tracks or Clips?  and then bounce to clips right?

Thanks again.

hey Bill,

Was there audio or just visual on the video?

ChuckC


Thanks Bill, I will try this later tonight (hopefully... if I get the time to) 

Yes the whole band slows down together.   

So when I am done I select all tracks or Clips?  and then bounce to clips right? 

Thanks again. 

Yes.  Just Edit > Select > All.  Then bounce to clips.  

Digi: no audio in that video.  Just a screen cap.

Thanks a bunch, Bill! Just what I needed too!

There is  video on my youtube page on how to extract a tempo map. That is here

In my experience it is very important to trim and bounce clips before using audiosnap. Doing that will greatly reduce your chances of seeing the dreaded "Tempo out of range" message, especially on live material with studio chit chat and other noise at the front of clips.

HTH

Well in this case for me Karl... all the other tracks will later be overdubbed anyway, I just need to get the drum track straightened out first.

Bill this seems to be effecting everything OTHER THAN my midi drum tracks ...? That's the one thing I really need straightened out here.

Ok then.... Sorry it's just the midi tracks that are effected by this method? Is that right?