chewy Posted January 5, 2006 Posted January 5, 2006 Version 4.52 seems to be very comparable to cdspeed and fully mature, variance of about 1% on first trial disk.
chewy Posted January 5, 2006 Author Posted January 5, 2006 thanks corn! I think those 2 scans are about as close as can be. Now this is almost approaching scientific standards.
chewy Posted January 5, 2006 Author Posted January 5, 2006 I saw this scanner on clearance for 32$ at newegg, took 3 flashes to get it crossed to the B line and updated, I think I will keep it.
lfcrule1972 Posted January 5, 2006 Posted January 5, 2006 I will grab 4.52 at the weekend and try some more scans too.....
LIGHTNING UK! Posted January 5, 2006 Posted January 5, 2006 btw, don't compare 'Quality' ratings between the two. The algorithms used to calculate that value are very different in each program. CDSpeed's is pretty basic. DVDInfoPro's takes more into account.
lfcrule1972 Posted January 5, 2006 Posted January 5, 2006 Thanks that answers another of my questions as to whether the quality ratings are to be believed or not !
chewy Posted January 5, 2006 Author Posted January 5, 2006 The algorithms used to calculate that value are very different in each program. CDSpeed's is pretty basic. DVDInfoPro's takes more into account. Cdspeed doesn't seem to factor in PIE's at all and Dvdinfo seems to give them just a little weight. Using a nec 3550 as a scanner to repeat this would probably show that. I doubt that either will ever incorporate a damper for rogue spikes into their equation.
LIGHTNING UK! Posted January 5, 2006 Posted January 5, 2006 Jitter plays a big part in DVDInfoPro's too. Not sure if CDSpeed uses it.
lfcrule1972 Posted January 5, 2006 Posted January 5, 2006 Will I need a modded FW to get my drive to do the Jitter tests ?
LIGHTNING UK! Posted January 5, 2006 Posted January 5, 2006 Don't think it's possible with NEC drives mate. Sorry!
lfcrule1972 Posted January 5, 2006 Posted January 5, 2006 Ah ok - no worries, just didn't want to run a load of tests and then find I could have done jitter tests too !
lfcrule1972 Posted January 5, 2006 Posted January 5, 2006 (edited) @chewy - you're right, the NEC doesn't like PIE scans much (saw that mentioned in the cdfreaks review of the drive as well), the rest looks ok though..... Edited January 5, 2006 by lfcrule1972
chewy Posted January 5, 2006 Author Posted January 5, 2006 that's a damn good burn and scan with such a new burner, the way I interpret is first look at the PIF totals, anything below 100 is great with an 8ecc scanner, the PIF average is next, here's the weak link, it needs to be reported to the 1/10 at least, this is where we get an idea how much rogue spikes skew the QS. Now last is the PIE's, they are easily handled by settop players, of course if you have POF's bush the disk. Try a rescan of the disk at 8x and see what happens to the PI peaks and average. I think the QS formula is pretty good, PIF average and total has far more weight. The new NEC's probably are off by a factor of 10 on the PIE. still running stock firmware I see
lfcrule1972 Posted January 5, 2006 Posted January 5, 2006 Ok about to re-scan, what difference does the speed make to the scan results chewy ?
lfcrule1972 Posted January 5, 2006 Posted January 5, 2006 (edited) Well 8x scan sure ups the PIE's and PIF's a bit What's the steady green line in this one ? Is it rpm ? Edited January 5, 2006 by lfcrule1972
chewy Posted January 5, 2006 Author Posted January 5, 2006 I have heard claims of a lot of variance in these scans with the 3550/4550, I know a disk is very sensitive to handling.
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