Helpful Reply[SOLVED] Tempo Map From Audio File - Advice Needed

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vanceen
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2016/03/31 18:13:16 (permalink)

[SOLVED] Tempo Map From Audio File - Advice Needed

I'm excited about this feature, and I thought I would give it a try right away.
 
I first tried it on an electric rhythm guitar part which is pretty distorted. The results were disappointing, i.e the tempo map was all over the place, even though the recording was done with a click. But then, I can see how a distorted waveform could make things difficult for the algorithm; probably better to record a DI track in parallel to a mic'd track if I want to generate a tempo map.
 
I then tried it on a project that started with the singer/songwriter playing acoustic rhythm guitar. In order to be rhythmically "free", the performer didn't use a click, and it rushes and drags a lot. Also in the project are lots of other audio tracks that I've managed to get to sound good with the original track after much work, since it was hard for everybody (especially the drummer) to overdub on to the "free" track.
 
A tempo map was generated, varying about as expected. But now the other tracks are out of time! Apparently changing the tempo map changed the playback timing of all the other tracks.
 
What I was hoping for was to see the other tracks play back exactly as they did before, and to use the new tempo map to fine tune some of the timing of those tracks. But how to do this?
 
I'm sure I'll figure this out, but I'm hoping some of you are ahead of me.
post edited by vanceen - 2016/04/07 18:57:28

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#1
vanceen
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Re: Tempo Map From Audio File - Advice Needed 2016/03/31 18:23:14 (permalink)
A follow up, in case it's helpful...
 
I copied the acoustic guitar track from the original project into a new project by itself. I then dragged the clip to the Timeline, and generated a Tempo Map. It worked great; the waveform transients are lined up with the vertical markers throughout the song.
 
Next, I copied (Events in Tracks only) a percussion track from the original project into the new project. The timing is now very close, whereas it was wildly off in the original after generating a Tempo Map!
 
EDIT: vertical, not "horizontal"
post edited by vanceen - 2016/04/02 15:54:51

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vanceen
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Re: Tempo Map From Audio File - Advice Needed 2016/04/01 19:47:55 (permalink)
I confirmed that copying and pasting tracks from the original project (Events only) into the new one with the Tempo Map created for the acoustic guitar track results in a project lined up with the beat lines and playing beautifully. For interest, I generated a click track by stretching out one bar of quarter note cowbell hits (Groove Clip'd), and the click stays right in time with the music, variable as it is.
 
This is great!
 
But I still wonder if there is a way to generate a Tempo Map from one track in a project, and have the existing tracks continue to play as they did before. This would be a lot easier than copying all the tracks to a new project, and would make tweaking of the timing in the project much easier.
 
Perhaps the conclusion is that you have to generate the Tempo Map before immediately after tracking the "free" track, before doing anything else. It's not clear to me why that should be.

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Billy86
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Re: Tempo Map From Audio File - Advice Needed 2016/04/01 20:23:22 (permalink)
Hi Vanceen... this sounds like something I could really use, since I "free form" to lay down an idea, then want to build around it. You mentioned "A tempo map was generated... " from a freely played acoustic guitar. How do you do that?
Thanks!
 

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Re: Tempo Map From Audio File - Advice Needed 2016/04/01 21:25:07 (permalink)
Billy, I believe that you need to use the purchased version of Melodyne that includes the ability to create a tempo map of the audio track(s).  Once that is done, you can drop the tempo map onto the timeline of the Sonar project and the tempo from that track is now your tempo in the Cakewalk project.
 
This is very exciting for its usefulness is something that will save me (us) hours of trying to manually create a tempo map lined up with an audio track.
 
I have already updated to Melodyne 4 in anticipation of this new tool but personally will wait for the official SPLAT version to be released before I try it.
 
Thank you NANCEEN for the play by play on your experimentation. It will save us all tons of time trying to work all these details out.
 
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Re: Tempo Map From Audio File - Advice Needed 2016/04/01 21:50:28 (permalink)
I think what you can do is either set all the other audio clips to be groove clips (so they bend to the new tempo) or make all audio clips Melodyne FX regions and inside there tell it to use the DAW's tempo (not sure about the original master track, it may need to be made into a loop or a region FX also). 
 
To do that in Melodyne I think you may need Editor 4 or higher (unless all the other audio clips are monophonic?).  I played with this just for a few minutes with a vocal track and some MIDI drums, didn't try with a second audio clip.  It does seem like it opens some interesting possibilities.

-Matt
 
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vanceen
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Re: Tempo Map From Audio File - Advice Needed 2016/04/01 23:11:16 (permalink)
I dragged the guitar clip up to the Timeline. That's all it takes to generate the Tempo Map.
 
I'm using Melodyne Studio, but I think it will work with other versions.

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Re: Tempo Map From Audio File - Advice Needed 2016/04/01 23:21:35 (permalink)
OK here's what I'm seeing.  I have a vocal clip.  I drag it up into the timeline and now I have a tempo map.  The visual of the track will have changed because the M:B:T have changed but the audio on playback is still the same.  If I bring in another audio clip, it plays the same, the tempo map doesn't change it at all.   If I change that other track into a groove clip or turn on audio snap though things do change, the sound of the second clip tracks the tempo map.
 
When you said your other tracks had been fixed, did you do the fixes with audio snap maybe?  If that's the case you may need to bounce them down to new clips since it looks like audio snap and groove clips track with the tempo.  Which to be honest seems strange since I'm not checking the "Follow Proj Tempo" on the Audio Snap but it's definitely changing my other audio clip.
 
I think I'm going to make some various length and speed click tracks and then see if I can work out how this process works.  Still not sure how the multi-track tempo features in Melodyne Studio actually work.  Those videos on their site are very hard to actually follow from a here's how to do this thing point of view.

-Matt
 
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elegentdrum
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Re: Tempo Map From Audio File - Advice Needed 2016/04/02 00:34:23 (permalink) ☄ Helpfulby tenfoot 2016/04/02 00:54:02
Tempo maps are best created from a bass line or the kick and snare. Vocals can dance around the timing.
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Re: Tempo Map From Audio File - Advice Needed 2016/04/02 04:22:25 (permalink)
elegentdrum
Tempo maps are best created from a bass line or the kick and snare. Vocals can dance around the timing.




Vocals should dance around the timing - that's what's called a performance :-)
 
and when out of tune it's called character ;-)

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Re: Tempo Map From Audio File - Advice Needed 2016/04/02 08:52:27 (permalink)
And if the vocals aren't out of tune it is called AUTOTUNE.  
 
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Re: Tempo Map From Audio File - Advice Needed 2016/04/02 13:11:27 (permalink)
msorrels
OK here's what I'm seeing.  I have a vocal clip.  I drag it up into the timeline and now I have a tempo map.  The visual of the track will have changed because the M:B:T have changed but the audio on playback is still the same.  If I bring in another audio clip, it plays the same, the tempo map doesn't change it at all.   If I change that other track into a groove clip or turn on audio snap though things do change, the sound of the second clip tracks the tempo map.
 
When you said your other tracks had been fixed, did you do the fixes with audio snap maybe?  If that's the case you may need to bounce them down to new clips since it looks like audio snap and groove clips track with the tempo.  Which to be honest seems strange since I'm not checking the "Follow Proj Tempo" on the Audio Snap but it's definitely changing my other audio clip.
 
I think I'm going to make some various length and speed click tracks and then see if I can work out how this process works.  Still not sure how the multi-track tempo features in Melodyne Studio actually work.  Those videos on their site are very hard to actually follow from a here's how to do this thing point of view.


Thanks msorrels,
 
I didn't use Audio Snap on the other tracks, as I haven't been able to get useful results from AS from on large scale timing problems. I manually lined up the transients in the other tracks using splitting and nudging and Bounced to Clips. Very time consuming and tedious, but a great result.
 
What you described is what I expected, that is that non-Groove Clip tracks would play exactly as they did before the new Tempo Map was generated. But no.
 
To be fair, I should experiment with some fresh tracks to understand what's going on. I hoped somebody on here would know.

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vanceen
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Re: Tempo Map From Audio File - Advice Needed 2016/04/03 14:27:11 (permalink)
OK, I'm carrying on with this in case anyone is either interested or has some answers to suggest.
 
I tracked a fairly busy MIDI piano part without a click, Froze it, and generated a tempo map from the audio. That worked great; all the notes that are supposed to be falling on beats are falling on beats.
 
Out of curiosity, I then Unfroze the track. The resulting MIDI was much slower than the original, and way, way out of time with the Tempo Map.
 
Why?
 
I'm going to do more and report back here.

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Re: Tempo Map From Audio File - Advice Needed 2016/04/03 15:04:18 (permalink)
vanceen
OK, I'm carrying on with this in case anyone is either interested or has some answers to suggest.
 
I tracked a fairly busy MIDI piano part without a click, Froze it, and generated a tempo map from the audio. That worked great; all the notes that are supposed to be falling on beats are falling on beats.
 
Out of curiosity, I then Unfroze the track. The resulting MIDI was much slower than the original, and way, way out of time with the Tempo Map.
 
Why?
 
I'm going to do more and report back here.




Maybe because you have mapped the trempo to follow any timing variation on the track that you froze. When you unfreeze it, the original midi piano part will also follow the new tempo map, compounding any tempo varations. The results will never be pretty.

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vanceen
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Re: Tempo Map From Audio File - Advice Needed 2016/04/03 15:40:19 (permalink)
Thanks, tenfoot, that's a good explanation.
 
The frozen track was generated from the MIDI track, and it should play identically. And it did! But after unfreezing, the MIDI track follows the new Tempo Map, as you said. The MIDI was originally reference to 100 bpm, and now it's referenced to whatever tempo the piano part had. In this case it was about 80 bpm, so it was slower.
 
But this was a bit of a digression. What I really want to know is why AUDIO tracks apparently change timing when the Tempo Map changes (see above), even though they aren't Groove Clip looped or AudioSnapped.
 
I'll keep at it.
 

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Re: Tempo Map From Audio File - Advice Needed 2016/04/03 23:42:43 (permalink)
Maybe try experimenting with property settings on the other clips?

There are various options for setting the disposition for MBT as well as "locking" the clips. I'm not at my studio computer so I'm trying to recall this from memory but I think exploring these options might help.

I know I've futzed around with those options with success creating tempo maps during those dark times before Melodybe. I believe it might help you in regards to both audio and MIDI too
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Re: Tempo Map From Audio File - Advice Needed 2016/04/04 00:02:53 (permalink)
Tempo maps do not affect playback of normal audio clips as long as they are not groove clips or audiosnapped clips with follow tempo enabled. The timeline scaling however will change to adapt to the tempo map. You can verify this by drawing  in a tempo map in a project without any loops or groove clips. The audio clips rendering will not be affected.

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Re: Tempo Map From Audio File - Advice Needed 2016/04/04 00:49:14 (permalink)
Do the clip start times reflect the new tempo maps?  I think they do. Vanceen, were original clips sliced into smaller clips? e.g beats? Perhaps during your experiments with audio snap?

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Re: Tempo Map From Audio File - Advice Needed 2016/04/05 11:11:14 (permalink)
VariousArtist
Maybe try experimenting with property settings on the other clips?

There are various options for setting the disposition for MBT as well as "locking" the clips. I'm not at my studio computer so I'm trying to recall this from memory but I think exploring these options might help.

I know I've futzed around with those options with success creating tempo maps during those dark times before Melodybe. I believe it might help you in regards to both audio and MIDI too



Thanks VariousArtist. I guess I could try locking positions. Still working to understand this.

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Re: Tempo Map From Audio File - Advice Needed 2016/04/05 11:13:21 (permalink)
ricoskyl
Do the clip start times reflect the new tempo maps?  I think they do. Vanceen, were original clips sliced into smaller clips? e.g beats? Perhaps during your experiments with audio snap?


 
Thanks, ricoskyl,
 
The clips I've been working with are long single clips per track. It would be good to know if start times follow clip beginnings, though.

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Re: Tempo Map From Audio File - Advice Needed 2016/04/05 11:24:25 (permalink)
Noel Borthwick [Cakewalk]
Tempo maps do not affect playback of normal audio clips as long as they are not groove clips or audiosnapped clips with follow tempo enabled. The timeline scaling however will change to adapt to the tempo map. You can verify this by drawing  in a tempo map in a project without any loops or groove clips. The audio clips rendering will not be affected.




Noel,
 
Thanks, that's what I expected and hoped.
 
However, when I follow these steps:
 
1. Ctrl-A and Bounce to Clips an all audio project.
2. Select one clip and drag to the timeline
 
the result is a Tempo Map matching the clip in Step 2. However, the other tracks, previously in good timing, are now out of time.
 
Any thoughts as to why this happens and how to avoid it?
 
Admittedly, this is a project I've been working on for a long time, through several versions of SONAR. Starting fresh with a new project, I haven't seen this happen in my experiments.

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Re: Tempo Map From Audio File - Advice Needed 2016/04/05 13:38:46 (permalink)
There does seem to be a change to the start time of an audio clip when adding a tempo map, if the clip is set to musical time instead of absolute time.  When I drag and drop a second audio file into a new track, it comes in as using a musical time base which then creating a tempo map from the first audio track in the project changes the timing.  But if I set the second audio clip to absolute time, the tempo map doesn't alter the timing.  Audio clips need to start at a non-0 time for this to show up I think.  A fully bounced track it shouldn't matter, but any floating clips that are using a musical time base seem to change with the tempo map changing.  Could also have something to do with some settings I've enabled and didn't realize it as well perhaps.

-Matt
 
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Re: Tempo Map From Audio File - Advice Needed 2016/04/05 14:39:29 (permalink)
On a Acid Loop style project (with clips of audio all over the tracks) if I don't select all and change the clip's time base to absolute before I convert a track to a tempo map using this new function, they will move all over the place when the tempo is added.
 

-Matt
 
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Re: Tempo Map From Audio File - Advice Needed 2016/04/05 19:34:26 (permalink)
Thanks for incorporating this feature and making the video to show how easy it is. Am very impressed!

 
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Re: Tempo Map From Audio File - Advice Needed 2016/04/05 19:40:29 (permalink)
Going back to the OP, distorted guitar is pretty much a worst-case scenario for any kind of tempo detection.
 
For the old school method, which is based on amplitude transients, it's bad because there are rarely significant transients in a heavily distorted guitar. It's fairly steady-state, as amplitude goes.
 
The new Melodyne thing, based on watching some of their videos, is clever in that it works off some kind of overall musical pulse. Which means it can extract tempo information from fairly non-percussive material. But again, distorted guitar doesn't contain much of that either.

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Re: Tempo Map From Audio File - Advice Needed 2016/04/05 19:57:48 (permalink)
It only makes sense. If your clip is referenced to M:B:T when the new timeline moves the original absolute time to a new M:B:T location, the timing will be off.
Ex. original
Project is set to 60 bpm
1:1:0 is at 0 seconds
2:1:0 is at 4 seconds
3:1:0 is at 8 seconds
4:1:0 is at 12 seconds
(the click is out of time)
 
the NEW timeline
1:1:0 is at 0 seconds
2:1:0 is at 4 seconds
3:1:0 is at 8.5 seconds
4:1:0 is at 12.7 seconds
(the song is slowing down, click is now in time)
 
Any clips that had properties set to M:B:T before the new timeline should now be out of time. No?
I think if you set the original clips to "absolute time" before the new timeline, you should be okay.
 
 
 
 

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Re: Tempo Map From Audio File - Advice Needed 2016/04/05 22:56:32 (permalink)
Seems like Sonar should say something/offer to fix things when applying a tempo map if any of the audio clips are non-absolute.  Something this page seems to claim happens with AudioSnap tempo changes:
 
https://www.cakewalk.com/...help=AudioSnap.06.html
 

-Matt
 
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Re: Tempo Map From Audio File - Advice Needed 2016/04/06 20:48:34 (permalink)
This tempo map thing is frickin' awesome.
 
Again, there has always been a way to hand tool these things, and if you are a Sonar expert it is probably pretty quick and you know how to get the desired results, but this makes it so quick and easy for us lazy folks.
 
It is also a lot of fun to throw songs you love in Sonar and follow the way tempo speeds up and slows down in very popular commercial recordings.   
 
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Re: Tempo Map From Audio File - Advice Needed 2016/04/07 13:21:46 (permalink)
Nothing but a big ole bunch of "+1's" from me - really, really good stuff.    And I'm just scratching the surface... although yeah, I find it very interesting to bring known songs into SONAR this way just to see how tempos fluctuate.  It's a great learning experience...

SteveC
https://soundcloud.com/steve-cocchi
http://www.soundclick.com/bands/pagemusic.cfm?bandID=39163
 
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#29
vanceen
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Re: Tempo Map From Audio File - Advice Needed 2016/04/07 18:40:49 (permalink)
Cracked it!
 
msorrels and jatoth were on the right track. I opened the subject project again ("free" tempo acoustic guitar), bounced all to clips, and then set all the clips to Absolute time base. I dragged the acoustic guitar to the time bar, and waited for the Tempo Map to Generate.
 
Everything is now as tight as can be, with everything that should fall on beat or measure lines falling right there.
 
post edited by vanceen - 2016/04/07 19:03:22

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