robertb wrote:It's a sad old fact that if somebody put the word out to all the experts far and wide to produce with their cd-writers just ONE audio CD-R that would be capable of playing on any normal working cd player that it just could not be done ??
Surely it can't be true ?
I'm afraid it is true. You take an old enough CD player that has not got a moden laser/photosensor combination to deal with the physical differences between CD and CDR bit-encoding and it is impossible to play a CD-R on that player.
Regardless of the level of C1 or C2 errors (and other performance characteristics of the burned disc itself).
But CD players like that are a rarity now and have been for several years (some high end cd players still produce an occasional problem with some discs). More recently dvd players have had problems with both cd-r and cd-rw discs, mainly due to laser wavelength and reflectivity differences (between cd-r and dvd discs). Even this issue was mostly solved in late 90s.
However the above points are IMHO more academic than important in practise.
Today (in EU) where most major label "cd releases "(pressed original audio discs, resembling audio CDs) are already or will be copy protected, I'd venture a guess that MORE players will have problems with original "CDs" than properly written CD-R discs.
To the original poster this may not be very helpful. In practise the easiest way to guarantee compatibility might (IMHO) be to carry with you your own CD-drives. With heavier DJ gear this may not be easy, but can still be easier than finding 100% cd-r compatibility with in-house pre-installed players that have gotten a lot of abuse and probably very little in terms of service or calibration.
Unfortunately CD DJs can't carry with them their own installable laser pick up optics, like vinyl DJs can with their own cartdridges/needles :)