darkmatter2
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Audio stretches with tempo change HELP!!!
Having a problem where the audio is linked to the tempo of the song. We recorded a portion of a song's bass to a reference audio click because the tempos were off on the project and we didn't want to mess with it at the time. Now that we want to edit the clips to a grid, we naturally need to get those tempos changed. When I change the tempo of the song at a specific spot to match the audio click, the recently recorded bass audio stretches along with it.
How can I disassociate the tempo change and the audio?
Thanks!!
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CJaysMusic
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Re:Audio stretches with tempo change HELP!!!
2011/06/08 23:19:03
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Disable groove clipping for that audio track. If its Midi, then you need to render it to audio, as midi will always follow project tempo.
Cj
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darkmatter2
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Re:Audio stretches with tempo change HELP!!!
2011/06/08 23:27:53
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I don't see the option of "Groove Clipping" for the track or the clip in the Inspector... Under the "Groove Clip" header, the option to "Stretch to Tempo" is disabled FYI.
?
Thanks!
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darkmatter2
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Re:Audio stretches with tempo change HELP!!!
2011/06/09 13:48:08
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CJaysMusic
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Re:Audio stretches with tempo change HELP!!!
2011/06/09 15:18:36
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lets clear up some guess work first. Is it MIDI or audio.
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brundlefly
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Re:Audio stretches with tempo change HELP!!!
2011/06/09 15:25:30
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When I change the tempo of the song at a specific spot to match the audio click, the recently recorded bass audio stretches along with it. Is it stretching/compressing audibly or just visually? M:B:T time is the absolute visual reference in SONAR, so when you change tempos, audio will appear to change length, but the rate at which the Now cursor travels along the timeline changes proportionally so playback is not affected. You should see both the audio click track and the bass track changing length.
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Beagle
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Re:Audio stretches with tempo change HELP!!!
2011/06/09 15:35:35
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brundlefly
When I change the tempo of the song at a specific spot to match the audio click, the recently recorded bass audio stretches along with it.
Is it stretching/compressing audibly or just visually? M:B:T time is the absolute visual reference in SONAR, so when you change tempos, audio will appear to change length, but the rate at which the Now cursor travels along the timeline changes proportionally so playback is not affected.
You should see both the audio click track and the bass track changing length.
we need more info from the OP, but I would guess that's what he's trying to do. if that's the case, then he needs to know that changing the tempo in the project does not affect the actual tempo of the wave file without changing it to a groove clip first.
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darkmatter2
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Re:Audio stretches with tempo change HELP!!!
2011/06/09 19:24:20
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When I change the tempo (to a faster one, from 117 to 122) at a particular measure (in this case 182), the clips (Audio, no MIDI) recorded prior get stretched out visually and at first listen, appeared to loose sync with the rest of the music (tracks previously imported into the project which is at 88.2k from a 96k project). However, I didn't listen further because I freaked out at first and didn't want to mess anything up. Today I made a test track and recorded audio at 120bpm, then increased the tempo to 140bpm. I noticed the visual wave stretch a bit, but it seemed that the audio was ok.... I'll check this afternoon with the actual bass tracks and review this audio sync question.
Thanks!
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darkmatter2
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Re:Audio stretches with tempo change HELP!!!
2011/07/25 18:41:05
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UPDATE
So what I discovered is that if you change the tempo on a section of time where freshly recorded clips are, the audio gets messed up, clips have silence in between them for example. I really wish changing the tempo of the song didn't affect audio clips. I'm not recording midi and I don't care about midi, just need the audio to be 100% independent from the recorded audio clips...
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frankandfree
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Re:Audio stretches with tempo change HELP!!!
2011/07/25 18:59:19
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I think the answer to that is in post 3 of this thread. You need to change the timebase of your clips. You can do that from the clip inspector. I don't know whether it could be set globally if you always need it like that? Someone else?
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SCorey
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Re:Audio stretches with tempo change HELP!!!
2011/07/26 10:06:12
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I don't know whether it could be set globally if you always need it like that? Nope, it can't be set globally. My preference would be for that setting to be a per-track and/or per-bus setting so that all events in a track or bus can be set to an absolute timebase. Which would include automation and notes within midi clips. And then for individual items (like clips or automation) to have the ability to be set independently to override the track or bus setting. I've sent in my feature request, have you? 
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John T
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Re:Audio stretches with tempo change HELP!!!
2011/07/26 10:28:04
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Sounds to me like you've got edits and stuff going on which a global time stretch is not going to handle well.
Best first step would be to bounce the contents of each individual track to a single continuous clip. Then start messing around with tempo.
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brundlefly
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Re:Audio stretches with tempo change HELP!!!
2011/07/26 11:04:02
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I really wish changing the tempo of the song didn't affect audio clips. I'm not recording midi and I don't care about midi
Set measure/Beat At Now is your friend. This is exactly its purpose. it adjusts the tempo of the timeline relative to existing audio (and MIDI, if it matters) without affecting the real-time playback of the existing tracks. Changing tempo directly assumes the audio and MIDI start times are already in sync with the M:B:T timeline (musical timebase), and you want them to stay that way. If it were the other way around, you'd have some large proportion of users hollering, "WTF! I raised the tempo in my project, and all it did was make the metronome click faster"!
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darkmatter2
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Re:Audio stretches with tempo change HELP!!!
2011/07/26 15:13:16
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John T
Sounds to me like you've got edits and stuff going on which a global time stretch is not going to handle well.
Best first step would be to bounce the contents of each individual track to a single continuous clip. Then start messing around with tempo.
Thanks John, that's exactly what we've had to do, which obviously prevents us from future edits based on previous editing work, which is not desirable.
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darkmatter2
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Re:Audio stretches with tempo change HELP!!!
2011/07/26 16:41:21
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brundlefly
I really wish changing the tempo of the song didn't affect audio clips. I'm not recording midi and I don't care about midi
Set measure/Beat At Now is your friend. This is exactly its purpose. it adjusts the tempo of the timeline relative to existing audio (and MIDI, if it matters) without affecting the real-time playback of the existing tracks.
Changing tempo directly assumes the audio and MIDI start times are already in sync with the M:B:T timeline (musical timebase), and you want them to stay that way. If it were the other way around, you'd have some large proportion of users hollering, "WTF! I raised the tempo in my project, and all it did was make the metronome click faster"!
Not sure I follow the procedure... If I need to change the tempo at say measure 75 from 120 to 117, and there are clips playing through this measure, what should I do with this feature to make it so that the clips don't get changed? I see Set Measure/Beat Meter dialog window that I can invoke from the measure marker, but what to do with it exactly?
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