Bad Disc!  Errors to ruin your day...

CD-R DRIVES AND MEDIA ARE NOT CREATED EQUAL**: You just spent thousands on gear, recording & studio time, mastering and package design. Do you want your master disc to be written on a generic disc with a $29 budget CD-R drive? Of course not. Many think that any drive will do - This is not the case. Some drives are indeed better than others. Some think that because their DVD-R drive cost $400 that it will burn CD-R’s better than a dedicated CD-R drive. Also, not necessarily the case. 

You may have heard about “blurry” discs - The actual designation is called BLER or BLock Error Rate. E11, E21, E31, E22, E32... Lots of room for error. 

Audio CD’s always have a certain amount of errors on them. It’s the nature of the beast. These errors are corrected by CIRC (Cross Interleaved Reed-Solomon Code) Logic in CD drives and players. C1 errors, including E11, E21 and E31 will be found all across an audio disc. C2 errors, such as the E22, are a little more serious. The player may ignore them... It may not...

MASSIVE Mastering employs Plextor Premium drives for PMCD writing. Every disc that leaves goes through a PlexTools Professional quality check. The entire disc is read and the number of C1 and C2 errors is listed. An average number and a peak number is included in the resulting printout. 

RedBook standards (IEC 908) allow for up to 220 C1 errors averaged over a 10 second period. Most quality discs will average lower than 50 per second. MASSIVE Mastering will DISCARD ANY DISC with a BLER that ever even approaches a peak of 30 per second. While RedBook allows for 220 C1 errors per second, you can expect your PMCD from MASSIVE Mastering to average less than 3. We will also discard any disc with even a single C2 error on it. Not per second, just one C2 error and it goes into the shredder. 

The images on the right represent the same project written on two different drives. DISC A was written on a well-rated and popular CD-R/RW drive. The other was written on our Plextor Premium drive. Both discs were written from the same image file at 4X.

The C1 error rate (in green) on drive A is nearly TEN TIMES higher than on Drive B. Still within acceptable limits, but what a difference! 

The shocking part is the C2 errors (in blue). Those are a MAJOR “no-no” on a RedBook disc. Any reputable replication company would refuse to replicate DISC A IF they did a C2 check on the way in. 

Again, note the C1 rate - The acceptable limit is 220 per second. Our disc comes in at an amazing 3.6 per second (about 1/60th of the acceptable limit) and a maximum reading of 40. Less than one fifth of the acceptable average level. Keep in mind that some discs will be higher, some will be lower. Also keep in mind that that we will not release your disc unless the levels are less than half of the standard limit. 

Which disc would YOU rather send in for replication?

Hint: It’s B!

Although, as good as that disc is, it doesn’t pass MM’s quality control. We like the rates to max out around half of that.

Memorex high speed CD-R media was used for these tests.

© MASSIVE MASTERING
© MASSIVE MASTERING

Had DISC A gone out for replication, the disc would likely be rejected by the replication plant. Keep in mind that many “short run” duplicators don’t check for these errors. You owe it to yourself to make sure your project’s production master is of the highest quality, and therefore the lowest error rates available. 

Take this as a little free advice - Even if you don’t master through MASSIVE Mastering, make sure that your replication company checks for these errors before running the job! 

PlexTools Professional error detection is included in all mastering projects and RedBook transfers at MASSIVE Mastering.. 

For more information on BLER and other cool stuff, visit CD-R INFO

** This is in no way meant to be an endorsement of Plextor PlexWriter Premium drives in particular. I can’t help it if they’re just the best. :)

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