How to Change Tempo of Only One Track in Garageband

Sacalait

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Changing tempo and NOT affecting audio

I've yet to figure this out...

Also, I'll try to explain in parts... and this is how I did it 5 or more years ago.

*I created midi tracks in Cakewalk version 3.0 for Windows (a 1990 version of Cakewalk which only then recorded midi).
*I converted the midi tracks to audio by playing back the audio in the sequencer and recording the audio in Sound Forge.
*I synced the tracks by adding the first four clicks of the click track to each audio track and then visually lined those up in the multi-track audio program- which in the beginning was Cool Edit Pro.
*I eventually went on to Sonar at version 2.
*Sonar has a default tempo of 100. These older songs are recorded at tempos other than "100". I never had any problems doing it this way back then (...and no, I don't do it this way now...). So... I'd like to revert to the original tempo in Sonar 7.

Is it possible without 'stretching the audio'? It seems every time I try "changing the tempo", everything gets out of sync. I think what I'm technically trying to accomplish is create a new tempo map to match the original tempo of the song.

THe workaround has been to export the tracks, create a new song with the original tempo, and import those tracks. This process works but it's a process I'd like to avoid if there's a simpler solution.

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ew

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RE: Changing tempo and NOT affecting audio 2008/03/29 16:57:21 (permalink)

ORIGINAL: Sacalait

Is it possible without 'stretching the audio'?

Nope.

ew

Sacalait

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RE: Changing tempo and NOT affecting audio 2008/03/29 17:06:32 (permalink)

Thanks. At least there's a 'plan B'.

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Sonar Platinum, PC- Intel i7-4770K w/16 Gig RAM Windows 8.1, Solid State Drive and eSATA drives, Mytek, RME UFX, RME Multiface II, Roland VS700,  A-Designs Pacifica, UA LA610, Presonus RC500. A-Designs Hammer EQ, DBX, AKG, Neumann, Roland, JBL, Fender, Gibson, G&L, Marshall, Korg, Martin, Shure, Electrovoice, Yamaha, Chameleon Labs comps.

spindlebox

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RE: Changing tempo and NOT affecting audio 2008/03/29 17:39:43 (permalink)

In Audacity (a free download), there's a way to change the tempo without changing the pitch. I forget what it's called though. It's pretty cool; it automatically detects the tempo of your WAV or MP3 too! Just make sure you do one track at a time.

That's the best way to do it, so hope is not lost.

altima_boy_2001

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RE: Changing tempo and NOT affecting audio 2008/03/29 17:51:15 (permalink)

Sonar's Producer version has the MPEX time/pitch stretch process which can adjust clip tempo and pitch independently. I don't know if that is relevent to the OP's question though.

If tracks are getting out of sync by altering the tempo map, then try locking the tracks before altering the tempo map. Alternatively, drag the left side of all audio clips back to measure 1.

ew

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RE: Changing tempo and NOT affecting audio 2008/03/29 18:16:12 (permalink)

ORIGINAL: spindlebox

In Audacity (a free download), there's a way to change the tempo without changing the pitch. I forget what it's called though. It's pretty cool; it automatically detects the tempo of your WAV or MP3 too! Just make sure you do one track at a time.

That's the best way to do it, so hope is not lost.

That works by timestretching, which the OP said he wanted to avoid...

ew

Jose7822

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RE: Changing tempo and NOT affecting audio 2008/03/30 01:30:09 (permalink)

Changing the project's tempo doesn't change the timing of Audio tracks (MIDI will be affected though) only their position in the time line (which may give the illusion of Audio being stretched). The exceptions are Audio Snap enabled tracks or ACIDized tracks which do adapt to tempo changes.

All you have to do is figure out the project's tempo, either by using a metronome with a TAP feature like the one in Sonar or with Audio Snap (disable it once the tempo is found), then select all the clips and "Move To" the begining of a measure.

Hope This Helps!

TTY TECH

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RE: Changing tempo and NOT affecting audio 2008/03/30 01:57:13 (permalink)

change tempo before adding any audio to the project.
wayne sf ca usa

HotCoollMusicGirl

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RE: Changing tempo and NOT affecting audio 2008/03/30 06:21:41 (permalink)

ORIGINAL: altima_boy_2001
If tracks are getting out of sync by altering the tempo map, then try locking the tracks before altering the tempo map. Alternatively, drag the left side of all audio clips back to measure 1.

Yes, that seems to prevent a left-ward shift of the audio clips after you stretch them. But it seems that you need to turn on the "Stretch to Project Tempo" option (under Clip Properties) BEFORE you drag the left side of the clip out to the very start of the song. I find that if I don't do that first, the part that I dragged out to the left -- at least the part that didn't contain any actual audio -- gets trimmed off when I turn Stretch on, and the original start of the clip gets located to the start of the song.

That said, I find that sometimes after turning on Stretch to Project Tempo, clips don't like being extended to the left: If they're shorter and towards the middle of the song, after extending them for what appears to be their original length, their data shifts over to the left by that same amount (a byproduct of the Stretch option being associated with Groove Clips and Looping, which assume a single, full-length iteration?) In fact, the only time this doesn't happen (as far as I can tell) is when the clip's length is greater than the distance from its start time to the start of the song. Not sure why that would be. For those clips that do have that problem, bouncing them to themselves (selecting just it and bouncing to clip) prevents this. But I sometimes find that certain clips just never correctly adjust to a new tempo (even one that remains constant for the whole song) while others do.

Honestly, changing the tempo of a song when the audio isn't groove clips, and especially when the clips have been split into smaller segments, is kind of a pain. I'd love the option of having all clips created with the Stretch to Project Tempo already selected, especially when I'm first starting out on a song and haven't settled on a tempo. Would make it easier to make these kind of changes (though I imagine that would increase the load on the CPU....??)

[Edited for inadvertent profanity: It seems 'shifts' has an f in it, which when when missing causes the word to get asterisked out. Clever software!]

post edited by HotCoollMusicGirl - 2008/03/30 06:27:40

How to Change Tempo of Only One Track in Garageband

Source: http://forum.cakewalk.com/Changing-tempo-and-NOT-affecting-audio-m1345965.aspx

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