Hi. The Verbatim AZO disc was purchased about two years ago. It’s a 50-disc spindle pack and the package reads “Made in Nantong City, Jiangsu Province, China” exactly. I paid about 78 (approximately $11 USD) for it.
I expect a stable low jitter just as in a pressed disc. If you scan any facotry-pressed CD using Benq Nexperia drive you’ll always get a very stable, straight jitter line. Not that like curve or wave as seen in my burnt disc.
I also burnt serveral other Verbatim discs and scanned them. Despite their low C1 error rates, the jitter is very unstable and also a bit high.
See the screenshots I took.
[QUOTE=Ibex;2784357]The jitter for your first scan is an [U]excellent[/U] result for Verbatim AZO CD-R (97m34s23f). I don’t know of any drive which can consistently produce lower jitter on these discs. (For the record, I’m a die-hard Verbatim AZO fan with 50+ optical drives in my cupboard. ;))
Did you buy them recently? Or is it an old pack?
The quality of these discs is highly variable these days. It’s been a long time since I saw a disc that good from recent production. (Where were they made? And can you read the first part of serial number printed in the centre of the disc?)
The sort of firmware modification you envisage has always been the sole preserve of the drive manufacturers. And even if you could tweak the strategy, I doubt that it would be possible to produce consistently better results. The jitter that your Benq is measuring is the product of several factors which affect the [I]apparent[/I] pit/land length (crosstalk from adjacent tracks etc.), not just the timing & power of the laser during the write process.
Modern high-speed Verbatim Super AZO CD-R (almost) never show super-low jitter like Taiyo Yudens. If you want Taiyo Yuden-like jitter from Verbatim CD-R you’ll need to track down some of the old slower Metal AZO CD-R from ~14+ years ago, or some of the earliest Super AZO from <2005 made in Mexico or China.
And the only reason to seek super-low jitter is if you’re a [I]CDFreak [/I]and want to explore what’s possible and where the limits are. Jitter needs to be a [I]lot[/I] higher than 10% before it affects the readability of a CD, and it cannot affect the sound quality. (Read errors may be audible, but it is easy to prove mathematically that jitter cannot affect the tone etc.)[/QUOTE]