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24-bit codec comparisons?

Reply #25
Here is the data from my quick 24/96 lossless compression comparision:
Code: [Select]
Name    Ext    Size    Type    Created    Modified    Accessed    Attr

The wav files:
paf2007-06-03s1t01.wav    wav    473088000    Audio File (WAV)    7/8/2007 08:56:49    7/8/2007 01:55:57    7/8/2007 01:41:36    ----A----
paf2007-06-03s1t02.wav    wav    447606784    Audio File (WAV)    7/8/2007 08:57:34    7/8/2007 01:49:00    7/8/2007 01:23:56    ----A----
paf2007-06-03s1t03.wav    wav    360878080    Audio File (WAV)    7/8/2007 08:58:16    7/8/2007 01:41:36    7/8/2007 01:20:17    ----A----
paf2007-06-03s1t04.wav    wav    644939776    Audio File (WAV)    7/8/2007 08:55:43    7/8/2007 01:53:39    7/8/2007 01:20:11    ----A----

Monkey's Audio 4.01 "insane"
Name    Ext    Size    Type    Created    Modified    Accessed    Attr
paf2007-06-03s1t01.ape    ape    220217344    Audio File (APE)    7/8/2007 09:21:35    7/8/2007 09:34:42    7/8/2007 09:21:35    ----A----
paf2007-06-03s1t02.ape    ape    208175104    Audio File (APE)    7/8/2007 09:34:42    7/8/2007 09:47:55    7/8/2007 09:34:42    ----A----
paf2007-06-03s1t03.ape    ape    170258432    Audio File (APE)    7/8/2007 09:39:19    7/8/2007 09:48:59    7/8/2007 09:39:19    ----A----
paf2007-06-03s1t04.ape    ape    301494272    Audio File (APE)    7/8/2007 09:21:35    7/8/2007 09:39:18    7/8/2007 09:21:35    ----A----

Flac 1.1.4b using compression level -8
Name    Ext    Size    Type    Created    Modified    Accessed    Attr
paf2007-06-03s1t01.flac    flac    245911552    Audio File (FLAC)    7/8/2007 09:05:10    7/8/2007 01:55:57    7/8/2007 01:41:36    ----A----
paf2007-06-03s1t02.flac    flac    232583168    Audio File (FLAC)    7/8/2007 09:07:30    7/8/2007 01:49:00    7/8/2007 01:23:56    ----A----
paf2007-06-03s1t03.flac    flac    187633664    Audio File (FLAC)    7/8/2007 09:10:00    7/8/2007 01:41:36    7/8/2007 01:20:17    ----A----
paf2007-06-03s1t04.flac    flac    335106048    Audio File (FLAC)    7/8/2007 09:12:17    7/8/2007 01:53:39    7/8/2007 01:20:11    ----A----

WavPack release 4.41 using -hhx6
Name    Ext    Size    Type    Created    Modified    Accessed    Attr
paf2007-06-03s1t01.wv    wv    232615936    Audio File (WV)    7/8/2007 11:12:12    7/8/2007 12:14:07    7/8/2007 11:12:12    ----A----
paf2007-06-03s1t02.wv    wv    220196864    Audio File (WV)    7/8/2007 12:14:07    7/8/2007 13:14:25    7/8/2007 12:14:07    ----A----
paf2007-06-03s1t03.wv    wv    179040256    Audio File (WV)    7/8/2007 13:14:25    7/8/2007 14:01:21    7/8/2007 13:14:25    ----A----
paf2007-06-03s1t04.wv    wv    317763584    Audio File (WV)    7/8/2007 09:50:00    7/8/2007 11:12:12    7/8/2007 09:50:00    ----A----

TAK 1.01 using -p4m
Name    Ext    Size    Type    Created    Modified    Accessed    Attr
paf2007-06-03s1t01.tak    tak    222396416    TAK File    7/8/2007 19:29:22    7/8/2007 19:31:58    7/8/2007 19:29:22    ----A----
paf2007-06-03s1t02.tak    tak    210464768    TAK File    7/8/2007 19:32:32    7/8/2007 19:35:21    7/8/2007 19:32:32    ----A----
paf2007-06-03s1t03.tak    tak    171737088    TAK File    7/8/2007 19:35:41    7/8/2007 19:38:04    7/8/2007 19:35:41    ----A----
paf2007-06-03s1t04.tak    tak    304373760    TAK File    7/8/2007 19:38:23    7/8/2007 19:42:50    7/8/2007 19:38:23    ----A----

Some informal observations:
WavPack took longest to encode, nothing else came close.
TAK was the quickest to encode.
However...
WavPack decompressed very quickly, and eventhough my hard drive was very busy writing 2 gigs of wav files, the cpu wasn't flooded at all.
TAK on the other hand was much slower than WavPack in decoding and flooded my CPU

Here is the shntool info output of the original wav files that I decompressed from the original flac files. The original recording comes packed in flac 1.1.2:
Code: [Select]
 
-------------------------------------------------------------------------------
File name:                    paf2007-06-03s1t01.wav
Handled by:                   wav format module
Length:                       13:41.332
WAVE format:                  0x0001 (Microsoft PCM)
Channels:                     2
Bits/sample:                  24
Samples/sec:                  96000
Average bytes/sec:            576000
Rate (calculated):            576000
Block align:                  6
Header size:                  44 bytes
Data size:                    473087160 bytes
Chunk size:                   473087196 bytes
Total size (chunk size + 8):  473087204 bytes
Actual file size:             473087204
File is compressed:           no
Compression ratio:            1.0000
CD-quality properties:
  CD quality:                 no
  Cut on sector boundary:     n/a
  Sector misalignment:        n/a
  Long enough to be burned:   n/a
WAVE properties:
  Non-canonical header:       no
  Extra RIFF chunks:          no
Possible problems:
  File contains ID3v2 tag:    no
  Data chunk block-aligned:   yes
  Inconsistent header:        no
  File probably truncated:    no
  Junk appended to file:      no
  Odd data size has pad byte: n/a
-------------------------------------------------------------------------------
File name:                    paf2007-06-03s1t02.wav
Handled by:                   wav format module
Length:                       12:57.091
WAVE format:                  0x0001 (Microsoft PCM)
Channels:                     2
Bits/sample:                  24
Samples/sec:                  96000
Average bytes/sec:            576000
Rate (calculated):            576000
Block align:                  6
Header size:                  44 bytes
Data size:                    447604416 bytes
Chunk size:                   447604452 bytes
Total size (chunk size + 8):  447604460 bytes
Actual file size:             447604460
File is compressed:           no
Compression ratio:            1.0000
CD-quality properties:
  CD quality:                 no
  Cut on sector boundary:     n/a
  Sector misalignment:        n/a
  Long enough to be burned:   n/a
WAVE properties:
  Non-canonical header:       no
  Extra RIFF chunks:          no
Possible problems:
  File contains ID3v2 tag:    no
  Data chunk block-aligned:   yes
  Inconsistent header:        no
  File probably truncated:    no
  Junk appended to file:      no
  Odd data size has pad byte: n/a
-------------------------------------------------------------------------------
File name:                    paf2007-06-03s1t03.wav
Handled by:                   wav format module
Length:                       10:26.520
WAVE format:                  0x0001 (Microsoft PCM)
Channels:                     2
Bits/sample:                  24
Samples/sec:                  96000
Average bytes/sec:            576000
Rate (calculated):            576000
Block align:                  6
Header size:                  44 bytes
Data size:                    360875592 bytes
Chunk size:                   360875628 bytes
Total size (chunk size + 8):  360875636 bytes
Actual file size:             360875636
File is compressed:           no
Compression ratio:            1.0000
CD-quality properties:
  CD quality:                 no
  Cut on sector boundary:     n/a
  Sector misalignment:        n/a
  Long enough to be burned:   n/a
WAVE properties:
  Non-canonical header:       no
  Extra RIFF chunks:          no
Possible problems:
  File contains ID3v2 tag:    no
  Data chunk block-aligned:   yes
  Inconsistent header:        no
  File probably truncated:    no
  Junk appended to file:      no
  Odd data size has pad byte: n/a
-------------------------------------------------------------------------------
File name:                    paf2007-06-03s1t04.wav
Handled by:                   wav format module
Length:                       18:39.687
WAVE format:                  0x0001 (Microsoft PCM)
Channels:                     2
Bits/sample:                  24
Samples/sec:                  96000
Average bytes/sec:            576000
Rate (calculated):            576000
Block align:                  6
Header size:                  44 bytes
Data size:                    644939568 bytes
Chunk size:                   644939604 bytes
Total size (chunk size + 8):  644939612 bytes
Actual file size:             644939612
File is compressed:           no
Compression ratio:            1.0000
CD-quality properties:
  CD quality:                 no
  Cut on sector boundary:     n/a
  Sector misalignment:        n/a
  Long enough to be burned:   n/a
WAVE properties:
  Non-canonical header:       no
  Extra RIFF chunks:          no
Possible problems:
  File contains ID3v2 tag:    no
  Data chunk block-aligned:   yes
  Inconsistent header:        no
  File probably truncated:    no
  Junk appended to file:      no
  Odd data size has pad byte: n/a

24-bit codec comparisons?

Reply #26
Tkanks for the data!
Some informal observations:
WavPack took longest to encode, nothing else came close.
TAK was the quickest to encode.
However...
WavPack decompressed very quickly, and eventhough my hard drive was very busy writing 2 gigs of wav files, the cpu wasn't flooded at all.
TAK on the other hand was much slower than WavPack in decoding and flooded my CPU

Can you please explain what exactly "flooded my CPU" means?

Your observation regarding TAK's decoding speed on high resolution audio is very interesting for me. TAK seems to behave significantly different than with 16 bit audio. It's a bit surprising, because the audio data is beeing sent trough exactly the same filters for 16 and 24 bit audio. It only has to be shifted down for TAK's reduced precision arithmetic. This operation is very fast; much faster than the filter operations which are equal for 16 and 24 bit audio. Therefore this can't explain the lower decoding speed.

Currently i see two possible reasons for the speed penality:

1) TAK 1.0.1 is using very large io buffers for high resolution audio. This is likely to affect the disk io speed.

2) The ram usage is much higher than neccessary. Possibly the data will not fit into the cpu's level 2 cache.

Fortunately TAK 1.0.2 will improve both aspects. The io buffer size will be reduced to about one quarter, the ram usage is already down to about one third. Probably this will significantly improve the decoding speed for high resolution audio.

Funny: I have already put much work into those optimizations but was not sure, how much sense this makes. Now i know...

  Thomas

24-bit codec comparisons?

Reply #27
I just performed a decoding speed test on my high resolution sample set. To test my hypothesis that your results may depend on disk io issues i performed a test without disk access: The compressed data was already in the file cache and both codecs had been configured to create no decoded output file (-t option for TAK, -v for WavPack). The files had been encoded with the strongest settings (-p4m for TAK, -hhx6 for WavPack).

Result: Decoding took 17.5 seconds for WavPack, 9.3 seconds for TAK.

Looks as if the disk io is a very important factor.

Unfortunately i can not provide results with disk io, because my hard disk is far too slow. Both codecs are decoding much faster than my hard disk can read and write data.

24-bit codec comparisons?

Reply #28
Tkanks for the data!

Can you please explain what exactly "flooded my CPU" means?

I was "watching" the process in Process Explorer, the free utility that was originally developed by Sysinternals and is now at M$crosoft. It puts a cpu usage graph in the lower right corner of the tool bar. Like I said, it was an "informal" observation.
The point I was trying to make was that WavPack, despite being incredibly slow to encode, was astoundingly fast decoding and appeared to take up less cpu resources. The upshot of all this is that WavPack appears to be astoundingly asymmetric at 24/96, much more than I expected.

I did not mean to imply that TAK was inadequate at decoding, just that it roughly appeared to be more symmetrical at 24/96 than wavpak(and probably flac). The reading from the TAK gui for decompression was a little over 14x if I remember correctly... That's not bad, especially considering the insane amount of data that's being processed.

I would be interested in seeing data on optimum frog for this file set, but it would take a very long time to process this file set with OFR at it's highest setting. I certainly don't have that much time...

WavPack in it's most recent incarnation states in the changelog:

Quote
added: MMX intrinsics for 24-bit (and higher) stereo encoding (thanks to
  Joachim Henke)


Could that also partly account for the "differences" I observed(I do have Intel Processor with MMX, SSE 1,2 and 3 etc...)?

I understand that TAK is a newer lossless codec, and thus hasn't had as much opportunity for optimizations etc... Heck, the most popular lossless codec out there(whose name I shall not mention) has been around for quite some time and only recently got the speed & compression optimizations it really needed at 16 bits. It still needs compression optimizations at 24 bits(according to the developer).

Here is an interesting question: What would the results be if I repeated the above test with a 24/48 fileset? There are a lot of recordings out there in this oddball format.

If I have time this week I might dither(and nothing else!) the fileset to 16/44 and repeat the tests. That might also be interesting...

24-bit codec comparisons?

Reply #29
Some informal observations:
WavPack took longest to encode, nothing else came close.
This is due to the x6 setting. IMHO the -x settings above 3 are not of practical use (maybe with the exception of the combination with the fast setting -f). -hhx2 would be a lot more reasonable, encoding timewise.

Quote
..WavPack appears to be astoundingly asymmetric at 24/96
The -x setting is causing this "asymetric" effect, it let's WavPack spend eXtra time on encoding, while decoding stays the same.

But maybe encoding time was not what you wanted to test...
In theory, there is no difference between theory and practice. In practice there is.

24-bit codec comparisons?

Reply #30
I did not mean to imply that TAK was inadequate at decoding, just that it roughly appeared to be more symmetrical at 24/96 than wavpak(and probably flac). The reading from the TAK gui for decompression was a little over 14x if I remember correctly... That's not bad, especially considering the insane amount of data that's being processed.
...
Quote
added: MMX intrinsics for 24-bit (and higher) stereo encoding (thanks to
  Joachim Henke)


Could that also partly account for the "differences" I observed(I do have Intel Processor with MMX, SSE 1,2 and 3 etc...)?

As i wrote above i am convinced that TAK's slow decoding is only beeing caused by it's sub optimal disk io interface. Your system seems to be much faster than mine and you are achieving only 14x realtime. Well, on my good old Pentium 3 with 1 GHz the decoding speed for this audio format is already more than 25x... Something is really going wrong here.

Here is an interesting question: What would the results be if I repeated the above test with a 24/48 fileset? There are a lot of recordings out there in this oddball format.

Regarding TAK's speed: If the large io buffer is responsible for it's slow decoding on your system, this effect should be considerably smaller with this format.

I definitely would like to find the reason for TAK's bad behaviour on your system (possibly this is not limited to your system). Would you be interested to repeat the decoding test with the current evaluation version of TAK 1.0.2? It alreday implements the new io interface with the smaller io buffers and should perform much better if the large buffers of 1.0.1 are responsible for the bad performance. Unfortunately i can't perform such testing by myself because my hard disk is much too slow.

  Thomas

24-bit codec comparisons?

Reply #31
[quote name='GeSomeone' date='Jul 9 2007, 04:43' post='503531']
This is due to the x6 setting. IMHO the -x settings above 3 are not of practical use (maybe with the exception of the combination with the fast setting -f). -hhx2 would be a lot more reasonable, encoding timewise.

[/quote]It was just an "informal observation." Also, I do not find the x6 settings to be impractical. Even though I haven't been using the x6 setting for a long period of time, I've already encoded lots of 24/96 recordings with it. I just script it and start the script before I goto work/bed. I do this with recordings about ~180 minutes length(~3.6gigs raw wav file size).

Quote
..WavPack appears to be astoundingly asymmetric at 24/96
The -x setting is causing this "asymetric" effect, it let's WavPack spend eXtra time on encoding, while decoding stays the same.

But maybe encoding time was not what you wanted to test...
[/quote]
No, I was strictly testing the encoded file size. In general I do not place a lot of emphasis on encoding speed, except in the case of OFR which is just too much.

24-bit codec comparisons?

Reply #32
Some math that I didn't have time to do originally:
[code]Name   Ext   Size   Type   Created   Modified   Accessed   Attr   Compressed
paf2007-06-03s1t01.wav   wav   "473,088,000"   Audio File (WAV)   7/8/2007 8:56   7/8/2007 1:55   7/8/2007 1:41   ----A----   
paf2007-06-03s1t02.wav   wav   "447,606,784"   Audio File (WAV)   7/8/2007 8:57   7/8/2007 1:49   7/8/2007 1:23   ----A----   
paf2007-06-03s1t03.wav   wav   "360,878,080"   Audio File (WAV)   7/8/2007 8:58   7/8/2007 1:41   7/8/2007 1:20   ----A----   
paf2007-06-03s1t04.wav   wav   "644,939,776"   Audio File (WAV)   7/8/2007 8:55   7/8/2007 1:53   7/8/2007 1:20   ----A----   
                        
paf2007-06-03s1t01.ape   ape   "220,217,344"   Audio File (APE)   7/8/2007 9:21   7/8/2007 9:34   7/8/2007 9:21   ----A----   0.465489177
paf2007-06-03s1t02.ape   ape   "208,175,104"   Audio File (APE)   7/8/2007 9:34   7/8/2007 9:47   7/8/2007 9:34   ----A----   0.465084783
paf2007-06-03s1t03.ape   ape   "170,258,432"   Audio File (APE)   7/8/2007 9:39   7/8/2007 9:48   7/8/2007 9:39   ----A----   0.471789342
paf2007-06-03s1t04.ape   ape   "301,494,272"   Audio File (APE)   7/8/2007 9:21   7/8/2007 9:39   7/8/2007 9:21   ----A----   0.467476628
                        
paf2007-06-03s1t01.flac   flac   "245,911,552"   Audio File (FLAC)   7/8/2007 9:05   7/8/2007 1:55   7/8/2007 1:41   ----A----   0.519800866
paf2007-06-03s1t02.flac   flac   "232,583,168"   Audio File (FLAC)   7/8/2007 9:07   7/8/2007 1:49   7/8/2007 1:23   ----A----   0.519614931
paf2007-06-03s1t03.flac   flac   "187,633,664"   Audio File (FLAC)   7/8/2007 9:10   7/8/2007 1:41   7/8/2007 1:20   ----A----   0.519936439
paf2007-06-03s1t04.flac   flac   "335,106,048"   Audio File (FLAC)   7/8/2007 9:12   7/8/2007 1:53   7/8/2007 1:20   ----A----   0.519592775
                        
paf2007-06-03s1t01.wv   wv   "232,615,936"   Audio File (WV)   7/8/2007 11:12   7/8/2007 12:14   7/8/2007 11:12   ----A----   0.491696970
paf2007-06-03s1t02.wv   wv   "220,196,864"   Audio File (WV)   7/8/2007 12:14   7/8/2007 13:14   7/8/2007 12:14   ----A----   0.491942642
paf2007-06-03s1t03.wv   wv   "179,040,256"   Audio File (WV)   7/8/2007 13:14   7/8/2007 14:01   7/8/2007 13:14   ----A----   0.496123943
paf2007-06-03s1t04.wv   wv   "317,763,584"   Audio File (WV)   7/8/2007 9:50   7/8/2007 11:12   7/8/2007 9:50   ----A----   0.492702723
                        
paf2007-06-03s1t01.tak   tak   "222,396,416"   TAK File   7/8/2007 19:29   7/8/2007 19:31   7/8/2007 19:29   ----A----   0.470095238
paf2007-06-03s1t02.tak   tak   "210,464,768"   TAK File   7/8/2007 19:32   7/8/2007 19:35   7/8/2007 19:32   ----A----   0.470200130
paf2007-06-03s1t03.tak   tak   "171,737,088"   TAK File   7/8/2007 19:35   7/8/2007 19:38   7/8/2007 19:35   ----A----   0.475886726
paf2007-06-03s1t04.tak   tak   "304,373,760"   TAK File   7/8/2007 19:38   7/8/2007 19:42   7/8/2007 19:38   ----A----   0.471941368

24-bit codec comparisons?

Reply #33
I can possibly provide further samples from my DVDA discs, I've ripped out all the hires data and stored them on DVDRs in Wavpack. It wouldn't take much time to recompress them using Foobar Converter, although, all samples are likely in totally different format (44,1k, 48k, 88,2k, 96k, stereo and 5.1, in all manners of combinations.).

24-bit codec comparisons?

Reply #34
Ok, I final did the same comparison after dithering the files down to 16bit.
Code: [Select]
Dithered files using ssrc_hp.exe --rate 44100 --bits 16 --normalize --twopass --dither 3 --pdf 1
Name    Ext    Size    Type    Created    Modified    Accessed
paf2007-06-03-dithereds1t01.wav    wav    144883712    Audio File (WAV)    7/24/2007 21:58:21    7/24/2007 22:01:12    7/24/2007 21:58:21
paf2007-06-03-dithereds1t02.wav    wav    137080832    Audio File (WAV)    7/24/2007 22:01:12    7/24/2007 22:04:26    7/24/2007 22:01:12    
paf2007-06-03-dithereds1t03.wav    wav    110518272    Audio File (WAV)    7/24/2007 22:04:26    7/24/2007 22:06:48    7/24/2007 22:04:26    
paf2007-06-03-dithereds1t04.wav    wav    197513216    Audio File (WAV)    7/24/2007 22:06:48    7/24/2007 22:11:22    7/24/2007 22:06:48    

Ape using insane compression
Name    Ext    Size    Type    Created    Modified    Accessed    Attr
paf2007-06-03-dithereds1t01.ape    ape    67575808    Audio File (APE)    7/24/2007 22:17:37    7/24/2007 22:24:02    7/24/2007 22:17:37    
paf2007-06-03-dithereds1t02.ape    ape    65622016    Audio File (APE)    7/24/2007 22:24:02    7/24/2007 22:30:33    7/24/2007 22:24:02    
paf2007-06-03-dithereds1t03.ape    ape    52113408    Audio File (APE)    7/24/2007 22:26:14    7/24/2007 22:31:18    7/24/2007 22:26:14    
paf2007-06-03-dithereds1t04.ape    ape    92811264    Audio File (APE)    7/24/2007 22:17:37    7/24/2007 22:26:14    7/24/2007 22:17:37    

TAK -p4m
Name    Ext    Size    Type    Created    Modified    Accessed    Attr
paf2007-06-03-dithereds1t01.tak    tak    68730880    TAK File    7/24/2007 22:33:43    7/24/2007 22:35:54    7/24/2007 22:33:43    
paf2007-06-03-dithereds1t02.tak    tak    66908160    TAK File    7/24/2007 22:35:54    7/24/2007 22:38:23    7/24/2007 22:35:54    
paf2007-06-03-dithereds1t03.tak    tak    52965376    TAK File    7/24/2007 22:38:23    7/24/2007 22:40:21    7/24/2007 22:38:23    
paf2007-06-03-dithereds1t04.tak    tak    94511104    TAK File    7/24/2007 22:40:21    7/24/2007 22:44:07    7/24/2007 22:40:21    

Flac version 1.2 using -8 (note:somewhere between this week and last week I deleated flac 1.1.4b from my computer)
Name    Ext    Size    Type    Created    Modified    Accessed    Attr
paf2007-06-03-dithereds1t01.flac    flac    70725632    Audio File (FLAC)    7/24/2007 22:13:48    7/24/2007 22:01:12    7/24/2007 21:58:21    
paf2007-06-03-dithereds1t02.flac    flac    68730880    Audio File (FLAC)    7/24/2007 22:14:35    7/24/2007 22:04:26    7/24/2007 22:01:12    
paf2007-06-03-dithereds1t03.flac    flac    54243328    Audio File (FLAC)    7/24/2007 22:15:18    7/24/2007 22:06:48    7/24/2007 22:04:26    
paf2007-06-03-dithereds1t04.flac    flac    97140736    Audio File (FLAC)    7/24/2007 22:12:52    7/24/2007 22:11:22    7/24/2007 22:06:48    

Flac version 1.2 using -8 on the orginal 24/96 wav files from previous posts
Name    Ext    Size    Type    Created    Modified    Accessed    Attr
paf2007-06-03s1t01.flac    flac    245911552    Audio File (FLAC)    7/25/2007 00:11:52    7/8/2007 01:55:57    7/8/2007 01:41:36    
paf2007-06-03s1t02.flac    flac    232583168    Audio File (FLAC)    7/25/2007 00:14:41    7/8/2007 01:49:00    7/8/2007 01:23:56    
paf2007-06-03s1t03.flac    flac    187633664    Audio File (FLAC)    7/25/2007 00:17:36    7/8/2007 01:41:36    7/8/2007 01:20:17    
paf2007-06-03s1t04.flac    flac    335106048    Audio File (FLAC)    7/25/2007 00:08:15    7/8/2007 01:53:39    7/8/2007 01:20:11    

WavPack using -hhx6
Name    Ext    Size    Type    Created    Modified    Accessed    Attr
paf2007-06-03-dithereds1t01.wv    wv    69427200    Audio File (WV)    7/25/2007 12:04:35    7/25/2007 12:21:41    7/25/2007 12:04:35    
paf2007-06-03-dithereds1t02.wv    wv    67506176    Audio File (WV)    7/25/2007 12:21:41    7/25/2007 12:38:03    7/25/2007 12:21:41    
paf2007-06-03-dithereds1t03.wv    wv    53407744    Audio File (WV)    7/25/2007 12:38:03    7/25/2007 12:50:47    7/25/2007 12:38:03    
paf2007-06-03-dithereds1t04.wv    wv    95612928    Audio File (WV)    7/25/2007 11:43:03    7/25/2007 12:04:35    7/25/2007 11:43:03

I've done most of the "data generation legwork" if someone wants to do analysis please feel free to help. We all have time constraints in our lives, by splitting this up we can get some useful data by x-mas...

 
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