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Topic: DAE Quality Results (Read 6859 times) previous topic - next topic
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DAE Quality Results

In case anyone is interested, I just tested my three optical units using Andre's DAE Quality guide and here are my results:

LG GSA-E10L:

Code: [Select]
Errors total        Num : 3286721
Errors (Loudness)   Num : 141431 - Avg :  -75.7 dB(A)   -  Max :   -8.9 dB(A)
Error Muting        Num :  27793 - Avg :    6.5 Samples -  Max :   3583 Samples
Skips               Num :      2 - Avg :   12.0 Samples -  Max :     12 Samples

Total Test Result       :   65.3 points (of 100.0 maximum)
C2 Accuracy             :   99.7 %





Plextor PX-230A:

Code: [Select]
Errors total        Num : 13885711
Errors (Loudness)   Num :  84565 - Avg :  -32.0 dB(A)   -  Max :   -5.5 dB(A)
Error Muting        Num :   8568 - Avg :  872.9 Samples -  Max :   3584 Samples
Skips               Num :      0 - Avg :    0.0 Samples -  Max :      0 Samples

Total Test Result       :   69.4 points (of 100.0 maximum)
C2 Accuracy             :   52.7 %





Plextor PX-755A:

Code: [Select]
Errors total        Num : 3240406
Errors (Loudness)   Num :  73466 - Avg :  -59.2 dB(A)   -  Max :   -8.6 dB(A)
Error Muting        Num :  20441 - Avg :    2.9 Samples -  Max :    217 Samples
Skips               Num :   1095 - Avg :   45.6 Samples -  Max :   2928 Samples

Total Test Result       :   52.1 points (of 100.0 maximum)

DAE Quality Results

Reply #1 –
Thanks for that.  Just ordered a PX-230A last week.... 

DAE Quality Results

Reply #2 –
When ripping with dBpowerAMP, the best results I got so far are from the PX-230A like the results above also indicate. The PX-755A is the worst ripper, even failing with very small scratches. I am so glad that I gave up my stupid idea of ripping with the PX-755A only because it can overread into the lead-out. Having 3 optical units helps a lot with scratched CDs.

DAE Quality Results

Reply #3 –
The C2 on a 203A so far has been perfect (ie no errors got past c2 reporting) on 1000's of rips I have done on scratched cds, certainly not 50%, is the test flawed?

DAE Quality Results

Reply #4 –
OK, yeah, I just noticed that the 230 had a higher overall score than the LG GSA.  The 230's C2 accuracy was lower than I expected, though.

DAE Quality Results

Reply #5 –
Bugger, i went to a PX-755SA and ditched my 3 old drives thinking it would be good for everything.

Why is there no C2 accuracy report for this drive?
Veni Vidi Vorbis.

DAE Quality Results

Reply #6 –
Quote from: HbG on
Why is there no C2 accuracy report for this drive?

Because Andre's test app fails the C2 accuracy test with the following error message : "No matching C2 read mode found!" This is the same with Plextor PX-716A, PX-755A and PX760A from what i personally know and maybe other models of Plextors too. I have just searched around a bit and have just found a Plextor PX-760A review from X-bit labs and they have tested the drive for among other things also C2 accuracy by using Nero CD-DVD Speed: Advanced DAE Error Correction Test. In that test then the Plextor PX-760A got a C2 accuracy score of 35.33%, which means that it catches about 1 error out of 3 errors occuring. Additionally it gotten a error correction score of 64%. The Plextor PX-760A is almost identical to the Plextor PX-755A, except in firmware, 18x writing and a different disc holding table for handling the higher rotation speed. Also the PX760A/755A uses an opdated version of the Sanyo chipset found in the Plextor PX-716A.

Source : http://www.xbitlabs.com/articles/storage/d...r-px760a_7.html

DAE Quality Results

Reply #7 –
Quote from: Martin H on
I have just searched around a bit and have just found a Plextor PX-760A review from X-bit labs and they have tested the drive for among other things also C2 accuracy by using Nero CD-DVD Speed: Advanced DAE Error Correction Test. In that test then the Plextor PX-760A got a C2 accuracy score of 35.33%, which means that it catches about 1 error out of 3 errors occuring. Additionally it gotten a error correction score of 64%.

Thanks for that link.  It's my understanding, though, that the Nero CD-DVD Speed test for C2 error-checking is much more reliable on A-BEX discs.  X-bit's test used the self-produced DAE test disc, which I haven't had much luck with (to be fair, I probably burned it too quickly... or used the wrong test disc).

DAE Quality Results

Reply #8 –
Quote from: spoon on
The C2 on a 203A so far has been perfect (ie no errors got past c2 reporting) on 1000's of rips I have done on scratched cds, certainly not 50%, is the test flawed?


What do you mean? I burned the reference.wav file using Plextools Professional, scratched the CD as indicated, painted that triangle as indicated, ran C2Extract.exe and finally Analyse.exe with -c2log as option. The funny thing is that the PX-755A (no C2) finished extraction in no time, the LG E10L took a bit longer, but not much, but the PX-230A took ages to complete - at least an hour.

DAE Quality Results

Reply #9 –
I'm curious, did the PX-230A work properly with EACs cache flushing?

I noticed mine, even with cache flushing enabled, every few sectors it re-reads on a badly scratch cd, the error correction bar will fill up instantly and give me a sync error.

DAE Quality Results

Reply #11 –
Quote
What do you mean? I burned the reference.wav file using Plextools Professional, scratched the CD as indicated,


A 50% result suggests that c2 will only detect half the errors, where as I have ripped many purposely damaged cds with the 230a (so 100,000s of errors), yet not one error got past c2, that suggests an accuracy of 99.999%. Not overly scientfic, but I know that 50,000 errors did not slip through.

DAE Quality Results

Reply #13 –
Tried this on the 230a?

Quote
The -c2flip switch will change MSB and LSB coding of the C2 error pointers. The standard defining the C2 error pointer was at the beginning very weak, it was not always defined which bit represent what byte. Thus some (few) drives uses a code exactly the other way round. (Even the Teac56S need this flag, but in the vendor documentation it is shown differently!). So if your resulting graph shows figures that seem far to high (red and blue graph nearly as high as the red one), try using this switch. Without the switch it will use the coding type as defined it the fixed standard.
 

DAE Quality Results

Reply #15 –
How did this turn out?