PerfectTunes changed confidence rating

[Gbeer7]

Re: PerfectTunes changed confidence rating

You know me too well garym !

[garym]

Re: PerfectTunes changed confidence rating

There are 16^8 possible checksums (that is eight sixteens multiplied with each other). Under uniform distribution, the chance of hitting any of 16 poisonous ones, is then 1 to 16^7, or one in 268 435 456.

The problem here is that Gbeer7 believes that he could personally be that 1 in 268,435,456 persons. In fact he believes the odds are high that he IS THAT PERSON.

[Porcus]

Re: PerfectTunes changed confidence rating

You don't seem to understand. There are lots of bad rips in the database, but the chances are miniscule that you will match someone else's bad rip (unless you took his or her physical CD and ripped it ... then chances are still not big though).

For the sake of the argument, consider a particular track; suppose that there are many scratched of this particular CD around, so that there are as many as 16 persons (for most CDs, that would be a big exaggregation!) having submitted a unique checksum from a bad rip for this particular track. That means there are 16 potential false verification, but what is the chance that you will hit one of them?

There are 16^8 possible checksums (that is eight sixteens multiplied with each other). Under uniform distribution, the chance of hitting any of 16 poisonous ones, is then 1 to 16^7, or one in 268 435 456.

[Gbeer7]

Re: PerfectTunes changed confidence rating

Cool, ok. So just left with the two offsets of +6 on the revolver album out of the rest of +0 which is worrying me.

[garym]

Re: PerfectTunes changed confidence rating

Sounds about right !

So what was the chap earlier meaning about "bad rips" getting in the database ?

I have no idea, I don't care, and it is irrelevant for you (and me). What if some guy went around with a single bad CD, ripped it 10 times on 10 different computers and at each rip, submitted this to Accuraterip. Then he sells this actual CD to you. You rip it on your computer and it comes back as Accurate with confidence 10. But the rip is not accurarate, because your bad rip matches the databases bad rip. So this is an example of Accuraterip failing to work. But for this scenario to even exist, there would be no other submitters of this CD (with correct rips), etc. etc. In other words, the odds of this happening are about the same as me sprouting wings today and flying around the world under my own power!

[Gbeer7]

Re: PerfectTunes changed confidence rating

Sounds about right !

So what was the chap earlier meaning about "bad rips" getting in the database ?

[garym]

Re: PerfectTunes changed confidence rating

edit: one more: Your questions remind me of something I saw in either an old movie or TV commercial. A dorky guy is asking a beautiful girl out on a date. She turns him down and says, "I wouldn't go out with you unless you were the last man on earth." He responds, "So, you are saying there is a chance then?"

[Gbeer7]

Re: PerfectTunes changed confidence rating

Ha ha, I see the point you are making
So what was the chap earlier meaning about "bad rips" getting in the database ?

[garym]

Re: PerfectTunes changed confidence rating

I do trust you both, honest. My brain will always come up with another "what if" question.

here's a whatif for you: based on the accuraterip data you've reported on your rips, there is a greater chance that an army of giant winged creatures from another solar system take over the world tomorrow and make me King of Earth than of your rips being bad. So worry about that instead....as after I become King, I might limit ownership of Beatles CDs.... ;-)

[Gbeer7]

Re: PerfectTunes changed confidence rating

I do trust you both, honest. My brain will always come up with another "what if" question.

[garym]

Re: PerfectTunes changed confidence rating

So generally most CDs rip fine just the odd percent that don't adnin stressing about something that doesn't need it.

Yes, Yes, and Yes. And you either need to believe what we are telling you, or you need to go buy 200 copies of all disks, and 200 different computers to rip them on an create your own personal version of AccurateRip.

[Gbeer7]

Re: PerfectTunes changed confidence rating

So generally most CDs rip fine just the odd percent that don't adnin stressing about something that doesn't need it.
So it's impossible for a scratched cd with an error to get in the database and for a another cd to match that error ?

[Porcus]

Re: PerfectTunes changed confidence rating

Are CDs that error prone or is this me again stressing and making something worse that it is?

Guess once


There are lots of scratched CDs around, but two CDs that are scratched to the point of error, will not be ripped to the same signal. That is, if two physical CDs rip to the same signal, then there are (with probability 99.lotsofnines percent) no such errors. That is the beauty of AccurateRip: rather than merely 'secure' reading of the same CD over and over again, you compare to someone else's rip of a different physical copy.

Now as garym points out, the big improvement is _one_ other rip agreeing with you. Whether 20 or 200 do, that doesn't really matter: the 20 vs 200 is down to how many did rip and submit (and thus, ultimately down to the popularity of the artist and release). If you buy a CD which only one other person in the entire world has bought and ripped, and your rip agrees -- well, that is accurate. With a capital A.

And the reason for the cross-pressing verification (that 'offset' thing) is not to give you 50 agreements in place of 10. It is to help you find _one_ match which could otherwise go unnoticed. One match from a different pressing, that is Accurate.

[Gbeer7]

Re: PerfectTunes changed confidence rating

Yes I am. I'm making myself Ill over them. To the point I can't rest until everything is perfect.

[garym]

Re: PerfectTunes changed confidence rating

That's a good point porcus. Thank you porcus and garym. I know I bang on abit. Are CDs that error prone or is this me again stressing and making something worse that it is?

I have close to 10,000 CDs. Only a tiny percentage have any problems in ripping. And this includes CDs that I've had for 25 years and were thrown around in the car for years, stacked up outside the boxes, and generally mistreated. You are overthinking, overstressing, and over worrying about your rips and CDs. But you already know that.