Old 10-02-2019, 11:26 AM   #1
reapercurious
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Default stretch points without rate slope?

I did a search for this already, and found a thread that kind of asks the same thing, but not.

I've never noticed time stretching actually changes the play rate in a logarithmic way, or a rate slope. I always thought that when you moved a stretch point, that it just uniformly changed the duration of both areas on left and right of the strech marker.
so the beats in between stretch markers are not symmetrical, one side of the stretched section is playing faster than the other side. there is a rate slope being generated. This causes a beat in the middle of a stretched clip to "swing" or "gravitate" toward one side of the other depending on which direction the rate slope is rolling. this can result in undesired timing effects.

so is there a way to do this without "physically" splitting the audio and manually stretching each clip? I don't want to have a rate slope all the time. Searched the options, didn't see a toggle for the feature.
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Old 10-03-2019, 10:14 PM   #2
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I can't remember exactly what I did, but I found a setting to disable up/down movement of stretch markers. Now they only move left/right. It made stretch majer edits much simpler and effective for me. And the rate slopes are now all strictly horizontal lines.
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Old 10-03-2019, 11:54 PM   #3
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Originally Posted by Philbo King View Post
I can't remember exactly what I did, but I found a setting to disable up/down movement of stretch markers. Now they only move left/right. It made stretch majer edits much simpler and effective for me. And the rate slopes are now all strictly horizontal lines.
Damn Philbo, I wish I knew about that option, I've spent days trying to stretch a piano track to match up with a drum track, finally figured out that if I was real careful about only moving the markers horizontally, it worked OK.

I gave up on trying to get the piano track to match up and posted on the forum for someone to record the piano track using the drum, bass, and rhythm guitar parts I've already recorded. I think it will be a better quality product in the end going that route, but I learned a lot about stretch markers, they're pretty cool when you know how to use them.
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Old 10-08-2019, 04:21 PM   #4
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Originally Posted by reapercurious View Post
I did a search for this already, and found a thread that kind of asks the same thing, but not.

I've never noticed time stretching actually changes the play rate in a logarithmic way, or a rate slope. I always thought that when you moved a stretch point, that it just uniformly changed the duration of both areas on left and right of the strech marker.
so the beats in between stretch markers are not symmetrical, one side of the stretched section is playing faster than the other side. there is a rate slope being generated. This causes a beat in the middle of a stretched clip to "swing" or "gravitate" toward one side of the other depending on which direction the rate slope is rolling. this can result in undesired timing effects.

so is there a way to do this without "physically" splitting the audio and manually stretching each clip? I don't want to have a rate slope all the time. Searched the options, didn't see a toggle for the feature.
Are you stretching an item (with the little hand icon), or are you using stretch markers? I also always thought stretching an item changes the playrate for the whole item equally....are you sure that's not the case? I can see it not being the case with stretch markers, as was already noted.
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Old 10-09-2019, 02:33 PM   #5
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thanks for the replies,

I'm dropping stretch markers on an audio track and I just noticed the mouse pointer changes from a sideways arrows to a vertical arrows, but it's easy to accidentally try to make an adjustment while the arrow is the wrong type, thereby causing rate sloping.

it would be nice if the only way to engage the rate slope tool was a special shortcut.
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Old 10-10-2019, 11:40 AM   #6
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I was just having a problem with being unable to un-rate-slope a section with the time stretch markers.

when did this feature arrive? it seems like a fun feature but it seems like a rather niche kind of effect to have always on.

is there a way to turn off the rate slope on time stretch marker sections?
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Old 10-27-2019, 10:26 AM   #7
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I'm getting this as well. Imove one stretch marker (well, they are transient guides actually) and it's fine. Move to the next one and move it, *with* the cursor showing a horizontal double arrow, and I get the rate slope thing. I had done a bunch of stretch edits just fine but now all the subsequent edits are sloping.

I've tried Ctrl-Zing back a bit and looked at the Action list but it seems as though a preference has changed somewhere (maybe I've mishit some key combo). I've no idea where to find the option or even what it would be called.

Any suggestions would be helpful
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Old 10-27-2019, 11:38 AM   #8
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Stretch markers follow the item properties setting for "Preserve pitch when changing rate" just like item edge option-drags.

Unticked is classic linked pitch/time. Veri-speed mode just like how an analog tape deck works. As you stretch the audio longer, the pitch lowers. This is also lossless FYI. (ie. If you stretched audio back to the exact original length in samples, it would null 100% with the original. This makes for truly lossless digital speed correction in restoration work with analog sources.)

Ticked is the separated pitch/time "DJ tricks" mode. Stretch the length and the pitch is altered to remain the same. Alter the pitch and the length/tempo is altered to remain the same. This can't be lossless of course - it's a pretty big alteration - but the Elastique Pro algorithm lets you go pretty far without glaring artifacts.

Sounds like you are looking for the "DJ tricks" mode.
Select the items you with to stretch, open item properties and tick that box.
"DJ tricks" mode is actually the default in Reaper out of the box.
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