jlrchrds Posted February 19, 2014 Share Posted February 19, 2014 Hello. I have an iMac and have used XLD ripping FLAC files for about five years. I use a Linn Klimax system. My internal apple superdrive supported C2, but it died. I purchased an external LG drive (lg-GE24NU40), but it doesn't support C2 pointers for ripping CDs. Just how important is this C2 ability? I select secure ripping and check against the Accuraterip database. I selected C2 for thousands of rips and am somewhat uncomfortable with not being able to do so now. I'm a mac guy and will consistently use external DVD CD drives moving forward since they no longer offer internal units. If you have a better idea for a drive let me know. Thanks. Jeff Link to comment
Paul R Posted February 19, 2014 Share Posted February 19, 2014 As long as you get error free RIPS that match the Accuraterip database, I do not think it is going to be a big deal. Why did you choose the LG drive over the Apple external drive? I mean, the LG seems like a fine drive to me and relatively inexpensive at $49, so I am not kicking at it. I just wondered. -Paul Hello. I have an iMac and have used XLD ripping FLAC files for about five years. I use a Linn Klimax system. My internal apple superdrive supported C2, but it died. I purchased an external LG drive (lg-GE24NU40), but it doesn't support C2 pointers for ripping CDs. Just how important is this C2 ability? I select secure ripping and check against the Accuraterip database. I selected C2 for thousands of rips and am somewhat uncomfortable with not being able to do so now. I'm a mac guy and will consistently use external DVD CD drives moving forward since they no longer offer internal units. If you have a better idea for a drive let me know. Thanks. Jeff Anyone who considers protocol unimportant has never dealt with a cat DAC. Robert A. Heinlein Link to comment
coxhaus Posted February 19, 2014 Share Posted February 19, 2014 I would think if you are getting Accuraterip rips you are good to go. This means the rips match the database exactly not secure rips. AMR 777 DAC, Purist Ultimate USB, PC server 4gig SOTM USB, server 2012, Audiophil Optimizer,Joule Preamp LAP150 Platinum Vcaps Bybee, Spectron Monoblocks Bybee Vcaps, Eggleston Savoy speakers, 2 REL Stentor III subwoofers, Pranawire Cosmos speaker wire, Purist Dominus Praesto cabling, Purist Anniversary (Canorus)power cables and Elrod Statement Gold power cable, VPI Aries I SDS w/Grado The Statement LP, 11kVA power isolation, 16 sound panels and bass traps TAD,RPG,GIK and Realtraps Link to comment
jlrchrds Posted February 19, 2014 Author Share Posted February 19, 2014 Thanks for replying Paul. I was told that the superdrive wouldn't work with my mac (it's from early 2009, an MB418LL/A) and I decided to purchase a front loading drive as a result. The LG was one of the better ones available at local retail store. I'm going to purchase a new iMac at some point but other than the drive, it works great. Do you know if the superdrive will work with that machine? Maybe it's just not supported. Link to comment
jlrchrds Posted February 19, 2014 Author Share Posted February 19, 2014 Thank coxhaus. Link to comment
Paul R Posted February 19, 2014 Share Posted February 19, 2014 I would be indeed surprised if it did not, as it works just fine on a 2008 vintage MacBook, but if you have a local Apple store, they can tell you for sure. -Paul Thanks for replying Paul. I was told that the superdrive wouldn't work with my mac (it's from early 2009, an MB418LL/A) and I decided to purchase a front loading drive as a result. The LG was one of the better ones available at local retail store. I'm going to purchase a new iMac at some point but other than the drive, it works great. Do you know if the superdrive will work with that machine? Maybe it's just not supported. Anyone who considers protocol unimportant has never dealt with a cat DAC. Robert A. Heinlein Link to comment
firedog Posted February 19, 2014 Share Posted February 19, 2014 Look at the excerpt below from the dbpoweramp site. C2 is good, but not a fooproof method for error checking. Several matches on accuraterip are basically a certainty that your rip is optimal. Detecting Errors There are 3 ways to detect errors, the first method and strongest is by AccurateRip, it compares your CD to somebody else’s CD ripped on different hardware. This method has strength and weakness - the strength is if AccurateRip says your rip is accurate with a confidence of 5, you better believe it (see below for technical details on AccurateRip), its weakness is if your CD is not in the database then AccurateRip cannot help you. The next method is the rip-rerip way, the idea is if there is a scratch the re-rip might get a different result so that area of the CD can be ripped many times until there are matches. EAC pioneered this method (the work of PlexTools and dBpoweramp are based on EACs work, we stand on the shoulders of giants, or a giant). This method is to be really put to the test and highlights dBpoweramp’s new way of doing it. Finally there are C2 Error pointers, in a simplistic form think of them as flag after a CRC check on the data. Also know that some drives do not support C2 pointers, whilst other drives do not detect all errors with C2 (because of poor firmware). Important point: no matter how good a C2 implementation is on any drive, errors can still sneak through - lets suppose that on a particular drive C2 error pointers can detect 999,999 out of 1,000,000 errors - sounds good odds, I am sure my CD is not that one in a million, I am 100% confident in C2 pointers. WRONG, a scratched CD might have 1,000 frames with problems (which test C2), so the chance of an error getting through on that CD is 1,000,000 / 1,000 = 1:1000 chance of the error getting through. How many CDs are ripped each week? Possibly 10 million (going off freedb disc connects). Of those 100 million tracks many errors would get past C2. Don't take this as an attack on C2, they help but should not be relied upon 100% solely - if supported switch support for them on. AccurateRip Overtime AccurateRip can become like a wise-friend, someone you can rely on and trust. It works by storing peoples ripping results and comparing your result with theirs. For example 100 people rip Madonnas latest CD, of those 100 twenty have errors, the other 80 all have identical rips. If you were to rip your Madonna CD there are 2 possibilities, AccurateRip would report that 80 other people agree with your rip (confidence of 80), or that 80 disagree if your had errors. What are the odds of 80 people agreeing with your rip, but they really had a bad rip (ie those 80 people had bad rips which happened to give the same check code)? the odds are 4 billion x 4 billion (repeated 80 times), an astronomical number. If more than 3 people agree with your rip, it is 100% certainty it is accurate. Main listening (small home office): Main setup: Surge protector +>Isol-8 Mini sub Axis Power Strip/Isolation>QuietPC Low Noise Server>Roon (Audiolense DRC)>Stack Audio Link II>Kii Control>Kii Three (on their own electric circuit) >GIK Room Treatments. Secondary Path: Server with Audiolense RC>RPi4 or analog>Cayin iDAC6 MKII (tube mode) (XLR)>Kii Three . Bedroom: SBTouch to Cambridge Soundworks Desktop Setup. Living Room/Kitchen: Ropieee (RPi3b+ with touchscreen) + Schiit Modi3E to a pair of Morel Hogtalare. All absolute statements about audio are false Link to comment
Audio_ELF Posted February 19, 2014 Share Posted February 19, 2014 I would be indeed surprised if it did not, as it works just fine on a 2008 vintage MacBook, but if you have a local Apple store, they can tell you for sure. You need to tweek a text file to get the Apple SuperDrive working on a MacBook (Pro) which originally had an internal drive. Eloise --- ...in my opinion / experience... While I agree "Everything may matter" working out what actually affects the sound is a trickier thing. And I agree "Trust your ears" but equally don't allow them to fool you - trust them with a bit of skepticism. keep your mind open... But mind your brain doesn't fall out. Link to comment
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now