Audacity Forum

Posted: **Tue Oct 04, 2011 2:12 am**

Long time, no see.
I've tested again with Audacity 1.3.13
Nothing has been resolved.

Any hopes?

Posted: **Tue Oct 04, 2011 10:44 pm**

DjBR wrote: I've tested again with Audacity 1.3.13
Nothing has been resolved.

That is why it is still listed in the 1.3.13 Release Notes.

DjBR wrote:Any hopes?

2.0 has not yet been released yet due to:
http://wiki.audacityteam.org/wiki/Relea ... at_Release

As Steve said, this will not be fixed before 2.0. Meantime you can use the workaround listed in the Release Notes.

Gale

Posted: **Tue Oct 04, 2011 11:46 pm**

The workaround which mentions that it resolves the problem by setting the High-Quality Conversion dithering to "None" is not working for me.
I just opened a PCM 16/44 and resaved as such, and it's not bit identical.
I'm on Ubuntu 11.04, Audacity 1.3.13

Posted: **Wed Oct 05, 2011 1:40 am**

I'm using Audacity 1.3.14 on Ubuntu 10.10.

Test method:

Disable dither in Audacity.
Import a 16-bit WAV file.
Export the file with a new name.
Calculate the MD5 checksum for both files

I've just run this test on 4 different WAV files, and each time the checksum has matched.

Posted: **Wed Oct 05, 2011 2:00 am**

steve wrote:I'm using Audacity 1.3.14 on Ubuntu 10.10.

Test method:
Disable dither in Audacity.

Import a 16-bit WAV file.

Export the file with a new name.

Calculate the MD5 checksum for both files
I've just run this test on 4 different WAV files, and each time the checksum has matched.

Same matching results in 1.3.14 on WIndows 7, but with SHA-512 checksum and also hex file compare.

Gale

Posted: **Wed Oct 05, 2011 3:32 pm**

All dithering disabled.

Foobar2000

Code: Select all

Differences found in 1 out of 1 track pairs.

Comparing:
"H:wav\01 -  example.wav"
"H:wav\01 -  example_02.wav"
Differences found: 2 sample(s), starting at 213.8799774 second(s), peak: 0.0000916 at 213.8799774 second(s), 2ch

Code: Select all

[email protected]:~/wav$ md5sum *.wav
df46d0e74695bb57987f8b2f5fa6b490  01 -  example_02.wav
c19eff9a189550b6018e20d9ce0eea8b  01 -  example.wav
[email protected]:~/wav$

I am going to try 1.3.14 in Windows to see how it goes.

UPDATE:

In fact, in 1.3.13, Windows build, I did not get this problem...

Code: Select all

All tracks decoded fine, no differences found.

Comparing:
"C:UsersDjBRMusic\01 -  example_02.wav"
"C:UsersDjBRMusic\01 -  example.wav"
No differences in decoded data found.

So what now? Lacking code on Linux build?

Posted: **Wed Oct 05, 2011 4:13 pm**

DjBR wrote:So what now? Lacking code on Linux build?

I'm on Linux.

Posted: **Wed Oct 05, 2011 7:00 pm**

I'm using Audacity 1.3.14 on Ubuntu 10.10.

So you are using a pre-release then.

The differences I spotted are between Audacity 1.3.13 for Linux and Windows.
Can you try 1.3.13 ?

Posted: **Wed Oct 05, 2011 11:30 pm**

DjBR wrote:
I'm using Audacity 1.3.14 on Ubuntu 10.10.
So you are using a pre-release then.

The differences I spotted are between Audacity 1.3.13 for Linux and Windows.
Can you try 1.3.13 ?

That would be pointless. Your 1.3.13 is not our current code, nor (unless you compiled our 1.3.13 source tarball) is it even our code - it's Ubuntu's release. Instead, I suggest you try the latest Audacity Daily Build from Ubuntu which is 1.3.14 with whatever modifications Ubuntu see fit.

Gale

Posted: **Wed Oct 05, 2011 11:47 pm**

I have upgraded to Daily Build PPA. I get the same thing.

Code: Select all

[email protected]:~/wav$ md5sum *.wav
df46d0e74695bb57987f8b2f5fa6b490  01 -  Example (Done with 1.3.13).wav
df46d0e74695bb57987f8b2f5fa6b490  01 -  Example (Done with Daily Build AKA 1.3.14-alpha).wav
c19eff9a189550b6018e20d9ce0eea8b  01 -  Example (Original).wav
[email protected]:~/wav$

Remaining discussion is about Linux behaviour, so split to http://forum.audacityteam.org/viewtopic ... 18&t=61303

Audacity Forum

WAV files exported from Audacity are not bit-identical

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Re: WAV files exported from Audacity are not bit-identical

Re: WAV files exported from Audacity are not bit-identical

Re: WAV files exported from Audacity are not bit-identical

Re: WAV files exported from Audacity are not bit-identical

Re: WAV files exported from Audacity are not bit-identical

Re: WAV files exported from Audacity are not bit-identical

Re: WAV files exported from Audacity are not bit-identical

Re: WAV files exported from Audacity are not bit-identical

Re: WAV files exported from Audacity are not bit-identical