Tempo Change

I created a song using soft synths and midi instruments.  I then laid down vocal tracks.  I now want to adjust the tempo of the song to make it a little slower.  Changing the tempo affects the soft synths and the midi instruments but not the vocals.  How do I get audio tracks to respond to tempo changes?

+1 exactly.

if you absolutely cannot re-record (like if the guy who laid down the awesome guitar track has passed away from terminal cancer now), there are a couple of options, but none as good as re-recording.

you can change it to a groove clip and change the tempo, then you'd have to move it around in the project to get it at the correct place in time.  large changes of tempo will not sound right, either.

another option is to upgrade to X1 Studio or Producer and use Audiosnap.

best way is to re-record.

Thanks to all for the suggestions.  Bottom line is I'm thankful the guy who laid the vocals is still kicking, being as that is me.  And the moral of the story is to nail down the tempo before laying any audio tracks.....thanks again!