Stretch audio segment

I've read that you can cut, copy, move, shorten audio segments. But it's not possible to stretch an audio segment? Let's say I've just recorded something and I want to stretch that recorded waveform so it matches the first two bars. So far I've found out that I can shorten the waveform, but that just cuts the end of it off. And I can do something called flex to stretch certain segments of the waveform. But I can't stretch the entire waveform outside the waveform length. For example: if I recorded something that lasts 2.75 notes and I want to stretch that waveform to 4 (so that it matches the first bar of a 4/4 song), that can't be done?
The other way around doesn't work either. For example: if I record something that lasts too long, for example 7.5 notes and I want to shrink that waveform so it matches the first bar of a 4/4 song, that doesn't work either. I can just shorten the waveform, which cuts a part of the end. I'd like to shrink the entire waveform or expand it when needed.
This can't be done in Garageband?

But it's not possible to stretch an audio segment?
You can, but it may not sound too good.
But I can't stretch the entire waveform outside the waveform length. For example: if I recorded something that lasts 2.75 notes and I want to stretch that waveform to 4 (so that it matches the first bar of a 4/4 song), that can't be done?
To be able to stretch or shrink, you need empty space to stretch the waveform into.
A quick&dirty work around: Record a few beats of silence directly behind the region that you want to extend. Then select the region and the silent region at the same time and merge them into one single region: "Edit > Join Regions". This will create a new audio file, however. In this joined region you can drag and extend the note, if flex is enabled for the track.

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Time stretch audio file to match tempo of track

Hi everyone, I am a new user of Logic express, and have found the info on this site extremely helpful, in conjunction with SFlogicninja's tutorials on youtube.
However, after watching a recent tutorial on Time stretching audio, i am now completely confused. Similar to the tutorial, i am trying to fit an audio region(an acapella track) to the tempo of the project. I have beat mapped the region to establish a tempo, but would like to experiment with slowing down or speeding up the track as a whole. As the acapella was created outside of Logic, i am bouncing the acapella track in order to be able to 'follow tempo'(as shown in the inspector). I have disabled the 'normalize' checkbox and bounced, but the bounced track still does not have the 'follow tempo' option in the inspector.
Any ideas as to why my bounced files cannot follow tempo. I can do it with audio that i create in Logic, but if i import any files, i was under the impression that by bouncing it within Logic, i could still obtain the same results?
I'm running out of hair to pull out!

Lennysapple wrote:
Oh really, it is supposed to be fixed in v 9.1.7
Then I'll have to give it a try.
Hi
Seems to work OK here
Lennysapple wrote:
Did I understand correctly that just by ""renaming"" Logic 9.1.6 inside the application folder it will keep it functioning in case I wanna revert to it later??
Yep (but you will probably still need one called "Logic Pro" to get Software Update to see it)
I have mine setup to quickly switch from 32bit to 64 bit (2 copies with different names) and also previous versions.... works fine
CCT

Get rid of the warnings prior to stretching audio in Arrange

Does anyone know how to get rid of the warnings prior to stretching audio in Arrange?
In the demonstration here on Apples own website, workflow is sped up by the fact that you don't have to hit ok twice before the edit is executed. I have tried to disable warnings etc, but it still does it.
http://www.apple.com/logicstudio/logicpro/
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Hey my friend and I are making a music video and we're wondering how to lock a clip to a segment of audio. Cause we have the video and music synced but then if we add a clip or delete a clip, the whole video is out of sync. Is there a way to lock clips to audio segments with iMovie? Thanks in advance!
Also on some clips we set the volume to zero but when we play the movie, the sound from the clip plays. We use the % indicator on the bottom left of the window and set it to zero but it still plays sound.

Thanks! We saw the lock clip to audio but it was grayed out so we didn't try it again.
Almost everything on the Mac works like this:
1. Select something.
2. Do something with it.
In iMovie we must select a clip — click on it — before we can act on it. Menu commands that act on clips are disabled — grayed out — when no clip is selected.
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How to identify low volume/level audio segments in a recording?

Iam newbie to Audition and trying to edit/master a 2 hour long lecture done in a live setting (not studio). Since the speaker sometimes moves away from the microphone the level of the audio sometimes falls off or reduces sometimes for a few seconds to a few minutes. I would like to identify all segments greater than 5 seconds which fall below say -5db.
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Is what you are going to do when you have identified these sections to raise the volume. That can be done automatically without previously identifying them by using the Dynamic Processing or Speech Volume Leveling effects.

I can't get the audio Playhead menu to appear so I can trim an audio segment in a secondary audio track. I see others are having Trimming Issues, but I can't even get the menu to appear.....

I need to trim off the front and back of audio segments (pulling from iTunes)
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I'm in hurry to finish a slideshow for a wedding (why I bought it to begin with) - any help will be appreciated.

That's the for the secondary track. But how do I trim the primary audio song from itunes. I did find a work around.
select the song in itunes.
command + I to get the information screen.
Under one of the tabs there is a "start" and "end" timer. Trial and error will put allow you to start and stop at the time specifed.
I renamed it " trimmed" so I knew it was a timmed version...then I inserted it into aperture the normal way...
A pain, but it works...

How do you export a specific audio segment in timeline

I recently tried to reduce noise from a specific clip by exporting a short segment of my audio to create a file I can use with audacity. I ended up exporting the entire audio segment of the project.
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I would like to avoid exporting the entire event clip from which that segment came. I have done considerable editing of the original video footage in the event and trying to figure out where that segment came from would require a considerable amount of time.
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in fcpx 10.0.6, if you have a range selection, the export will be only that segment.
Hold down the R key and click-drag a range selection, or use the playhead to mark In ('i' key) and Out ('o' key) points.
Select Share > Export File
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For Format: Audio Only
Audio File Format: I recommend AIFF, CAF or WAVE (depending on your target audio editor.) [AAC, AC3, and MP3 are "delivery" formats, not editing formats.]
then hit Next and save it.
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Deleted audio segment leaves blank space that I can't remove

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I went to clip mode like some suggested in previous similar questions, but there is "no black clip" to select and delete.
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Thanks!

I have experienced the same thing. It used to be thought that a stray audio clip had relocated to further out on the audio track, but I never found one. Usually, the movie reverted back to end where the 'good' audio or video clip ended.
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I do that and then put the quicktime movie into a new iMovie project and check the end of it. Sometimes there will be several seconds of 'snow' as seen on tv in the old days when stations went off the air at 1am. You can cut out this excess and have your movie end where it is supposed to. Just use this qt version to upload or import into iDVD.

Burn Audio CD and Time Stretching audio - software on the iMac?

I have a new iMac 24 running OSX 10.4.9 and had two questions:
1) Is there software on the iMac for buring an Audio CD? Created a song and I am trying to figure this one out.
2) Is Garageband able to time-stretch a song? I need to edit some performance songs that need to end at a specific time. I use Sonar on my PC to do this but wondered if Garageband or another utility on my iMac could handle this.
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1) iTunes will do that (not GB). Just create a playlist and click "Burn Audio CD". (That's the default setting.)
2) GarageBand can do that, but you'll have to play around a lot to achieve it. I'd recommend an audio editor like Audacity or SoundStudio - there you can change the tempo of a song (without affecting the pitch), and it will tell you immediately how long the result will be.

Stretching audio in FCE

I have a video file of a brass band performance that I have put into FCE. However the audio quality is not the best, and want to replace it with a separately recorded audio file of the same band playing the same music. I have dropped the new audio in place, and sync'd its start with the video and old audio.
The problem is that this audio recording is approximately five seconds shorter, start to finish, than the same track on the video. What I want to do is stretch the new audio track by those five seconds to make the track lengths identical. There does not seem to be a way to do this in FCE, but I also have Audacity, Amadeus and a couple of other audio processing programs, and what I read says time stretching can be done in Audacity. However, I cannot figure out how to do it, and the "manual" is no help.
Does anyone have a procedure for doing this that they would like to share (in some detail, please!)?

There is also Amazing Slow Downer" which can slow a piece of audio without altering the pitch.
http://osx.iusethis.com/app/amazingslowdowner

Edit & export audio segments as separate files?

Hi,
I'm cutting up recordings of PowerPoint presentations into separate clips, one per slide. I am wondering how I can edit on the timeline, then mark each slide, master the audio, and export one clip per marker. Is that segmenting done from Premiere, or is it an option to export one file per marker within Media Encoder? How?
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Or should I do this editing in Soundbooth instead, since the editing is basically audio-driven? How's segmenting done there?
Thanks!
>B

Hi Kevin -
It's funny... We are doing the exact same thing that you are. We are recording webinars, chunking up the audio into individual files according to PPT slides, and putting the audio back into the PPT presentation so they can be played back as the presentation initially aired. We're also exporting the reconstituted presentations as standalone webcasts that people watch online.
Okay - here's how we're doing it... I record the webinar's audio and video (Camtasia for audio and GoToWebinar's built-in .WMV recorder for video). I make a new project in Premiere and import both the video and audio. I only use the .wmv for visual reference (to know exactly where to split the long audio clip). I go through the audio clip and do an Alt + [ to mark the left side of the work area (essentially the In point) and Alt + ] to mark the right slide of the work area (essentially the Out point). I then split the clip at the out point (Control + K) in case I have to go back and re-edit or re-export later. Once I have my slide's audio marked with a work area, I go to file, export, media. This launches Adobe Media Encoder. In AME, I make .mp3s of each slide's audio. I then reinsert the .mp3s in the PPT presentation.
What I would LIKE to do is put chapter or Flash markers at the end of each slide's audio and then have it chunk up the clips for me based on the markers. The quest to do that led me to this post. I'll let you know if I find out any info on how to do that, but for now, the process is pretty manual and time-consuming. I am a long-time Avid editor, and that offers no solution either. What have you found with Final Cut?
Something also that may work for you (but not for us for various reasons) is iSpring Presenter's sync function. This allows you to bring in the entire audio clip and put it on the first PPT slide. Then you click a stopwatch icon when the audio is supposed to go to a different slide. This syncs up your audio and PPT for you. No more Premiere. Here is specific info on how to do that. It works great. We don't use it because we have to cut back into the presentation with live audio. But it may work great for what you're doing.
http://www.ispringsolutions.com/kb/faq/pro/42.html

Rate Stretch audio goes out of sync when exported.

Audio, which is rate stretched using the rate stretch tool to 100.01%, plays fine in Premiere Pro CS6. However, when exported to Encore or to MPEG-2 file, the audio is no longer stretched and becomes out of sync by the end of the video. When I play the preview in Encore, the audio is out of sync. Switch back to Premiere, it is OK. Export a MPEG-2 file and author a DVD, the audio is out of sync. Go back to Premiere, it is OK. I record the audio using a TASCAM portable recorder. I have recorded and synched audio many times and this is the first time that it does not work, on two separate Premiere projects. Any ideas on how to fix this. Even better, is there a way to record audio so that it matches the video (from a Panasonic HD AVCHD camcorder) without requiring rate stretch adjustment?

Try changing the speed with right click, Speed/Duration instead of using the Rate Stretch tool.

Swap out audio segment in multicam editing

I am doing a multi-cam edit with 2 angles. I have set cam1 as the sole audio source because it has the best sound. However, there is a 10 second segment where I have no sound. Cam2 has good enough sound at that time segment. I can create a "switch" to cam 2 during that time but I dont know how to change the sound to cam2 only for that one segment.
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Just edit it in...
Jerry

Un-stretch audio?

Hi
I stretched an audio file a while ago and accidentally deleted the origional file.
The action is not visible on the undo-history.
I guess the only way I have is to un-stretch the file and try to listen...
Anyone know if a way to see how much a file is stretched exist in LPX?
thanks

Actually the term "extract audio" is misleading.
It just copies the audio from the clip to a separate audio track and mutes the original track.
So to un-extract audio you just need to delete the extracted audio track and un-mute the original clip's audio.

Time Stretch Audio in FCP?

I've got a sound I'd like to time stretch on a simple project. I'd rather not have to do anything in STP since this is the only sound I need it for--is there a way to stretch in FCP?

Hello Mr. Wolsky,
I have read many of your extremely well informed posts on this site and greatly respect your opinion. I am wondering, however, if you are perhaps mistaken in stating that one cannot pitch shift in FCP.
I invite you to go to the Apple Sound Effects Plugins folder and take a look at "AUPitch". I have used it often for making Foley sound effects that I either can't be bothered to search out - for instance a huge metal clanging door I pitch shifted up a few octaves and it became a briefcase lock springing open.
I think people just don't look in that folder because it looks kinda boring.
Here is an extract from an article on Ken Stone about the Apple audio filters.
Hope this helps.
Harry.
AUPitch
+Adjusts the pitch of your audio, obviously. There are a LOT of controls though, and I have to admit that I don't have a clue what a Glb Trigger Thresh or a Loud Aggr K is. Effect blend blends the pitch-shifted audio with the original and is sometimes necessary to make voices sound natural. It is worth mentioning that I've gotten perfectly acceptable results by adjusting the first two parameters and not bothering with any of the others. I'd imagine that most people wouldn't have to adjust more than these.+
+I tried a Google search on some of these parameters but they only turned up forum threads where people were asking what on Earth they meant and no-one was able to solve their problem. If anyone does know, I'd be interested to hear from them.+
+This can be useful for making a male actor's voice more masculine (yes, I have had to do this!).+

Stretch audio segment

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