Audacity3.0.2 compressor error

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waxcylinder
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Re: Audacity3.0.2 compressor error

Post by waxcylinder » Fri Apr 23, 2021 11:59 am

Steve, at Step 8 did you use Ctrl+A (thereby selecting the negative 9 seconds as well as the positive 21 seconds)?
Look carefully at the "timeless" start time in the Selection toolbar.

Your image is what I get if I used click&drag to select just the 21 seconds that are in positive time.

Peter.
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waxcylinder
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Re: Audacity3.0.2 compressor error

Post by waxcylinder » Fri Apr 23, 2021 12:01 pm

steve wrote:
Fri Apr 23, 2021 11:57 am
waxcylinder wrote:
Fri Apr 23, 2021 11:38 am
Note too that when you have a selection in negative time - the start Time in the Timer toolbar gives no helpful information
That is to be expected because time widgets only support positive values. It's the result of the (frankly, rather dumb) idea that supporting negative time regions was a good thing, when actually it opens a big can of worms. I don't see this to be a "bug", but rather a consequence of a series of bad design decisions.
It's a bug because
a) it only affects Compressor and not the other effects
b) it can result in the loss of data

And it's a bug of our own making for allowing audio in negative time ...

Peter.
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steve
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Re: Audacity3.0.2 compressor error

Post by steve » Fri Apr 23, 2021 12:02 pm

waxcylinder wrote:
Fri Apr 23, 2021 11:59 am
Steve, at Step 8 did you use Ctrl+A (thereby selecting the negative 9 seconds as well as the positive 21 seconds)?
Yes. You can see in my screenshot (highlighting in the timeline) that the selection extends before t=0.
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steve
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Re: Audacity3.0.2 compressor error

Post by steve » Fri Apr 23, 2021 12:05 pm

waxcylinder wrote:
Fri Apr 23, 2021 12:01 pm
It's a bug because
a) it only affects Compressor and not the other effects
I get the "--h--m-- ---s" display whenever the selection starts before t=0.
The time widget has no way of showing negative values.
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waxcylinder
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Re: Audacity3.0.2 compressor error

Post by waxcylinder » Fri Apr 23, 2021 1:10 pm

steve wrote:
Fri Apr 23, 2021 12:02 pm
waxcylinder wrote:
Fri Apr 23, 2021 11:59 am
Steve, at Step 8 did you use Ctrl+A (thereby selecting the negative 9 seconds as well as the positive 21 seconds)?
Yes. You can see in my screenshot (highlighting in the timeline) that the selection extends before t=0.
OK so Ill be logging this as a Mac & Linux bug then 0 does not happen on Linux

This is a regression on 2.4.2 where it works properly - but an improvement on 3.0.0 where

a) On W10 Audacity crashes at Step 9

b) on Mac at Step 9 you get the error mesage
>Internal Error>Internal error at wavetrack.cpp line 1374
>Please inform the Audacity team at https:/[email protected]/

Peter.
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waxcylinder
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Re: Audacity3.0.2 compressor error

Post by waxcylinder » Fri Apr 23, 2021 2:19 pm

waxcylinder wrote:
Fri Apr 23, 2021 11:54 am
I get the same results on My Big Sur macOS 11.2.3 Macbook Pro

I'll be logging this later today.
Logged as P2 Regression Bug #2753 for Win and Mac
https://bugzilla.audacityteam.org/show_bug.cgi?id=2753
Compressor works incorrectly when selected audio is partly in negative time

Good catch tac2 - thanks for the report :) 8-)

BTW the workaround is:
Don't use Cmd+A to make your selection for Compressor - zoom the project to fit the screen and then use Click&Drag to select the audio


Peter
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