How To Change Tempo without affecting audio

I looked at the help file and everything... When you change the tempo it stretches out the audio in the track.

I don't want anything to happen to the audio when I insert a tempo...

How do I do this?

Thanks
Mike

You can't do it with real audio...but in Guitar Tracks Pro 2 you could. Seems to be a simple feature that wouldn't hurt to include. Varispeed...they used to do it all the time in the 60's didn't they?

I'm not sure how simple it would be to implement - but it would be handy. There is a cheap program I've used called the Amazing Slowdowner from Roni Music which will allow you to change pitch without changing tempo and/or change the tempo without changing pitch. It has been pretty useful in my church work.

Of course, any time you manipulate audio there will be some alteration to quality to some extent.

Just some thoughts:
1. It helps to give forethought to your final tempo when composing/recording.
2. If your recording at a slower tempo for accuracy (or lack of required skill - I've done it many times), use MIDI - which is way easier to manipulate all aspects of the performance after the fact. Although, depending on your gear, it may limit your expressiveness.

I looked at the help file and everything... When you change the tempo it stretches out the audio in the track.

I don't want anything to happen to the audio when I insert a tempo...

How do I do this?

Hi ammiel, which version of Sonar do you use? (I think this should be the first question)

re the replies so far - don't any of you read the OP's request? it seems you're all mostly on AUTO mode..

"You can't do it with real audio...but in Guitar Tracks Pro 2 you could" - no, he didn't mention "change the audio's speed and pitch"..varispeed? not as I understand the OP.

"try using freeze"..hmm

"I'm not sure how simple it would be to implement"...hmm hmm

"There is a time stretch/pitch-shift tool in Sonar that actually works quite well " nice..for another thread I guess

flame on..

'cmon everybody. I'm not at my PC now, but is it really impossible in SONAR to change the tempo and leave audio untouched???? I find this hard to believe. IIRC I've several times imported a wav-file and then adjusted the tempo to match the file without affecting the audio in any way.

Montezuma...I don't understand your answer at all??
LLP..Freezing has got nothing to do with this.

The OP says:" I don't want anything to happen to the audio."

Thanks Larry!

ORIGINAL: fwrend

Tempo/Speed? ...hmmm

Change Tempo without affecting audio

tempo? speed? pitch? did he mention any of that?
"Change Tempo without affecting audio " - Is there a slight chance that ammiel wanted to AFFECT the audio? maybe.. and maybe that's the reason for all the above replies..but wait a minute, is it a 20% maybe? or close to 5%? maybe 50%? i guess the answer is anywhere between 20% to 40%

Al, why take the time to point out others' flaws? Just answer the question. Now I just pointed our your flaw. Great, you sucked me in...

Yes it just LOOKS like the audio is stretching as it is essentially just zooming in or out of the audio when you change the temp. The sound of the audio is exactly the same. MIDI will change in tempo as it is locked to the tempo map. Audio is not locked and has its own fixed tempo which SONAR does not know (unless you tell it to find the tempo or something).

With your example, lets say your audio tracks were recorded at 90BPM. Your MIDI is perfectly in time with this as it is also set to 90BPM. You now change the tempo of the entire project in SONAR to 100BPM. The audio will stay at 90BPM as this is what it was recorded at. The MIDI will change to 100BPM so it will be playing faster than the audio now. The snare will now come in faster than it did before. You should not be recording audio and then trying to change the tempo of it (except when going for a certain purpose) but should be setting up your MIDI to the correct tempo and recording to that. This will get you the most natural audio. If you wish to change the tempo of the audio afterwards, you can do this but the pitch will increase or decrease unless you use specific algorithms (time stretchers/pitch shifters) to stop this from happening.

Hope that explains something

Select all audio clips, press Alt+Enter. Switch "Time Base" to Absolute; check "Lock".
You can close this dialog and make any tempo changes.

ORIGINAL: CJaysMusic

If you change the tempo, the audio will not change, just the timeline will change. Its not midi and its not synced to the tempo. The project tempo can be 120bpm and your audio can be what ever its wants. yuo can reocrd an 80bpm in a 120bpm project. Audio is not effected by the tempo.
Cj

But it does mess with the tracks relative positions IIRC if ...

ORIGINAL: Vovchik
Select all audio clips, press Alt+Enter. Switch "Time Base" to Absolute; check "Lock".
You can close this dialog and make any tempo changes.

..this isn't done. This may be what the OP was asking.

ORIGINAL: CJaysMusic
If you change the tempo, the audio will not change, just the timeline will change. Its not midi and its not synced to the tempo. The project tempo can be 120bpm and your audio can be what ever its wants. yuo can reocrd an 80bpm in a 120bpm project. Audio is not effected by the tempo.
Cj

+1. You're talking about the display... not the actual audio.

By default, the audio DOES NOT change when you make a tempo change. But, everything else does. So the timeline changes (after all, a measure at a different tempo is no longer the same size).

What you actually need to do IS change the tempo of the audio in order to hang tight when you make tempo changes. That's groove clips or Audiosnap, covered thoroughly in the help file.