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Flac 24bit
Dr.Victor
post Feb 20 2006, 17:30
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hi,


I just make some tests with 24bit files. (I have no read any information about supporting bit rates in flac)

And there is intresting fact just it seems to be all ok, but packed files for about half sized compare to monkey's packed files, which is generally impossible.
BUT!
After decompressing these files I getting files seems to be playable.
(not make correct test of these files yet)


What is your opinion, please help me, because I wanted to archive all my projects contains large amount of 24 bit files.


Regards,
Victor
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Synthetic Soul
post Feb 20 2006, 17:42
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FLAC will support files from 4 bit to 32 bit.

The relevant answer in the FLAC FAQ can be found here.


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Duble0Syx
post Feb 20 2006, 18:13
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QUOTE (Synthetic Soul @ Feb 20 2006, 08:42 AM)
FLAC will support files from 4 bit to 32 bit.

The relevant answer in the FLAC FAQ can be found here.
*

Last I checked FLAC does not support 32-bit. I thought 24 was the max. Someone correct me if I am wrong. When I make music in the end it is 32-bit and FLAC won't take it.
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Shade[ST]
post Feb 20 2006, 19:02
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Maybe flac supports 32 bit integer?

@Dr.Victor : what do you mean, " but packed files for about half sized compare to monkey's packed files"?
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skamp
post Feb 20 2006, 20:30
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"FLAC supports from 4 to 32 bits per sample. Currently the reference encoder and decoders only support up to 24 bits per sample."

This post has been edited by skamp: Feb 20 2006, 20:31


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Dr.Victor
post Feb 20 2006, 21:26
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hello,

Here is the file list. The flac is about half as monkey size.It's generally
impossible. (monkeys set to high pack, flac to 6)

G:\temp\Loseless Audio Packer tests\!
acguit pengetes_01.ape 830 188 2006.02.20 9:11pm A
acguit pengetes_01.flac 333 916 2005.10.01 12:25am A
acguit pengetes_01.wav 2 658 284 2005.10.01 12:25am A
acguit pengetes_02.ape 1 185 284 2006.02.20 9:11pm A
acguit pengetes_02.flac 461 538 2005.10.01 12:26am A
acguit pengetes_02.wav 3 697 964 2005.10.01 12:26am A
Oboa_01.ape 830 976 2006.02.20 9:12pm A
Oboa_01.flac 370 461 2005.10.01 12:14am A
Oboa_01.wav 2 540 204 2005.10.01 12:14am A
Oboa_02.ape 1 206 672 2006.02.20 9:12pm A
Oboa_02.flac 520 135 2005.10.01 12:14am A
Oboa_02.wav 3 542 444 2005.10.01 12:14am A
Oboa_03.ape 78 456 2006.02.20 9:12pm A
Oboa_03.flac 4 960 2005.10.01 12:15am A
Oboa_03.wav 1 074 824 2005.10.01 12:15am A

15 files; 19 336 306 bytes

Total: 1 directories; 15 files; 19 336 306 bytes
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Dr.Victor
post Feb 20 2006, 21:36
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Hm.. Maybe it will more itresting...

Check the file size of oboe_03 ! It is a silent soundfile...
How can it be that monkey make only half size from it , and flac only few bytes.

All other sounds all not silent sounds from the list , but the difference still big !
So the reason I think not this.


regards,
Victor
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Emanuel
post Feb 20 2006, 21:56
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A thread that shows the opposite. Afaik, no solution yet.


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Alex B
post Feb 20 2006, 22:30
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I made a minimal test with a small music file. No weird sizes here. Also the decoded outputs were identical with the original 24-bit wave file.



I tried a completely silent file too. It seems that Monkey's Audio can squeeze digital silence more in 16-bit mode and FLAC in 24-bit mode.



However, I don't think the amount of digital silence compression makes any practical difference. The sizes are small anyway.

In any case you should compare the decoded files for making sure that they have identical audio content.


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Alex B
post Feb 20 2006, 23:16
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Actually, I think the Monkey's Audio developer has forgot to optimize digital silence in 24-bit mode. The 24-bit file is full of "zeros" when viewed with a hex editor. The 16-bit file contains apparently just the file header. (I used Monkey's Audio 3.99 GUI program for encoding.)


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Emanuel
post Feb 21 2006, 08:26
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Thats strange but good. Can I ask you of a favour? What happens if you try to encode the files in this post?


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Dr.Victor
post Feb 21 2006, 18:59
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Here is the files I tested

I made my 24 bit 48kHz file Oud_02.wav packed with flac, monkey, and monkey's
external wavpack compression.
Original was 2439k Packed ape 622k, packed flac 228k (!!!) it's not half, it's LESS THAN half !!

After decompress again I made exact file comparsion, and the file is same, No errors!
(On standard wave files, I need to mention that I made test on broadcast files too, on compression broadcast wav flac lost the tag information, monkey was perfect on this)

Regards,

Victor

Please check it for you :

http://www.drvictor.net/original_file.zip
http://www.drvictor.net/packed_depacked_files.zip

G:\! Packer test\ORIGINAL FILE
Oud_02.wav 2 439 668 2005.


G:\! Packer test\Packed Files
Oud_02.ape 622 120 2006.02.21 1:01pm A
Oud_02.flac 228 469 2005.10.01 2:58am A
Oud_02.wv 231 052 2006.02.21 1:01pm A
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