[Lmuse-developer] [ lmuse-Bugs-1929397 ] Gain function damages audio recordings

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Bugs item #1929397, was opened at 2008-03-30 23:24
Message generated for change (Comment added) made by cargobidibulle
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Category: Audio
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: cargobidibulle (cargobidibulle)
Assigned to: terminator356 (terminator356)
Summary: Gain function damages audio recordings

Initial Comment:
Hello good people from the muse team.

Today I will talk about the muse bug that frightens me the most. This one is MAJOR, although luckiky it shows up very rarely. (but it did today :) )

Here it is:
In audio edition window, when I use the gain function, sometimes the audio recording is severely messed up. Either, the part I was working on is silenced, or it becomes a mess of the same recording truncated in random.

The bad thing is that this damage is directly done into the  audio file of the recording, and so the undo function does not work at all. The recording is lost forever (one of my song still have a bad sequel of that bug :) ).

The only workaround I found was to make a daily backup of all my files... :)

It is hard to say how to provoke it. I saw it about 4 or 5 times, and it was always after lots of audio recordings. I guess there is a link. (I use gain function a lot usually)

Background:
I am a regular muse user since last summer. I am using Muse 0.9 on ubuntu 7.10 32bit, on an AMDx2

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>Comment By: cargobidibulle (cargobidibulle)
Date: 2008-04-02 09:47

Message:
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Thanks Tim.

A warning is already something, but one problem is that since update from
version 0.9pre2 to 0.9, the "edit in external audio editor" function is no
longer working. I used to edit audio with audacity, but today although
"audacity" is still set in setting page, the audacity window just does not
open up. (Sometime I work directly on audio recordings, opening them from
audacity. But it is unconvenient for large number of recordings.)

This is one of the two regressions I noticed from 0.9pre2 to 0.9. For the
other one I will submit separated bug report. 

Thomas

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Comment By: terminator356 (terminator356)
Date: 2008-04-01 08:18

Message:
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You have just learned how Muse edits audio files in place. :-(
Unfortunately, Muse's handling of audio file editing is basically written
in stone.
It is too late and too complex to change this now.
Ironically, I recently added some code to the Muse 0.9.x CVS (development)
branch,
 which warns the user upon the very first attempt at wave editing. It
warns:
"Warning! Muse currently operates directly on the sound file."
"Undo is supported, but NOT after an exit, WITH OR WITHOUT A SAVE!"
"If you are stuck, try deleting the associated .wca file and reloading."
But I disabled it, fearing that users would be 'annoyed' by the warning.
But I will enable it now. I absolutely want users (especially new ones) to

 see this warning! It will appear in the next release.
The new Muse version '2' may have better support for this.
I am not sure, it appears to use sound 'clips', which may help. 
I would have to ask Werner if this is true.  Tim.

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