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thomasvs / morituri

For those about to RIP - a Unix CD ripper preferring accuracy over speed
GNU General Public License v3.0
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What should I make of confidence? #104

Closed joetemp closed 9 years ago

joetemp commented 9 years ago

So, when I'm done ripping an album, I get my confidence ratings... which seem to be arbitrary since I can't make any sense of the numbering scheme. I would think it would be out of 100 but it will say confidence is 25 of 200. Or 65 of 109. I don't understand. Should I just assume that if it says each rip is accurate that it is? Also, I had one track say "max confidence" but it also said that the rip was "NOT accurate". What am I to make of all this? Thanks!

joetemp commented 9 years ago

Along these same lines... ripped an album today and the first song has a peak level of 38.65%. I've never seen anything below 90. What should I make of that?

thomasvs commented 9 years ago

On 01/18/2015 12:55 AM, Joe Templeton wrote:

Along these same lines... ripped an album today and the first song has a peak level of 38.65%. I've never seen anything below 90. What should I make of that?

I'm surprised you've never seen anything below 90. Remember that going from 100% to 50% in peak level is only a 6dB drop. CD's have a dynamic range of 96dB. It would be fairly common for an intro track to have a lower peak level.

What album is this?

Thomas

— Reply to this email directly or view it on GitHub https://github.com/thomasvs/morituri/issues/104#issuecomment-70397614.

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thomasvs commented 9 years ago

It's directly based on EAC's output, and I agree it's not 100% intuitive.

Yes, it does look like the AccurateRip database maxes out at 200 submissions. You would have to ask the guy running it why that is.

When it says confidence is 25 out of 200, that means that in the pool of 200 submissions accuraterip has for this disc, 25 match your checksum.
It's fairly common to have different pressings with the same disc id but slightly different audio data, resulting in different checksums.
Sometimes it's also simply because of submissions with wrong offsets, but less likely.

Can you cut and paste the line that says max confidence but not accurate?

T

On 01/13/2015 11:10 PM, Joe Templeton wrote:

So, when I'm done ripping an album, I get my confidence ratings... which seem to be arbitrary since I can't make any sense of the numbering scheme. I would think it would be out of 100 but it will say confidence is 25 of 200. Or 65 of 109. I don't understand. Should I just assume that if it says each rip is accurate that it is? Also, I had one track say "max confidence" but it also said that the rip was "NOT accurate". What am I to make of all this? Thanks!

— Reply to this email directly or view it on GitHub https://github.com/thomasvs/morituri/issues/104.

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joetemp commented 9 years ago

All this makes total sense. I understand it all now. Thanks!