D.M. Procida wrote:

-------------------


And it is remarkable, but also galling, that my
£20 USB optical drive can reliably read anything I put in it, while the
hi-fi CD players in the house that I spent considerably more on will
reliably refuse to play certain discs (and not all the same ones in each
case).


** CD players are unsurprisingly designed to play audio CDs made to the original 1982 Red Book standard. Such disks carry the rectangular logo: "Compact Disc digital audio".

OTOH optical drives are built to a later and very different standard that allows different laser wavelengths, higher speeds, finer track pitches and smaller pit sizes.

It should be no surprise the latter will play non standard audio CDs.

Such CDs should not carry the rectangular logo but rather have a warning to be played only in machines equipped with modern optical drives.



..... Phil

Phil Allison wrote:

D.M. Procida wrote:

-------------------


And it is remarkable, but also galling, that my
£20 USB optical drive can reliably read anything I put in it, while the
hi-fi CD players in the house that I spent considerably more on will
reliably refuse to play certain discs (and not all the same ones in each
case).


** CD players are unsurprisingly designed to play audio CDs made to the
original 1982 Red Book standard. Such disks carry the rectangular logo:
"Compact Disc digital audio".

OTOH optical drives are built to a later and very different standard that
allows different laser wavelengths, higher speeds, finer track pitches and
smaller pit sizes.

It should be no surprise the latter will play non standard audio CDs.

Such CDs should not carry the rectangular logo but rather have a warning
to be played only in machines equipped with modern optical drives.

I'm talking about standard audio CDs.

Daniele

D.M. Procida wrote:

-------------------



And it is remarkable, but also galling, that my
£20 USB optical drive can reliably read anything I put in it, while the
hi-fi CD players in the house that I spent considerably more on will
reliably refuse to play certain discs (and not all the same ones in each
case).


** CD players are unsurprisingly designed to play audio CDs made to the
original 1982 Red Book standard. Such disks carry the rectangular logo:
"Compact Disc digital audio".

OTOH optical drives are built to a later and very different standard that
allows different laser wavelengths, higher speeds, finer track pitches and
smaller pit sizes.

It should be no surprise the latter will play non standard audio CDs.

Such CDs should not carry the rectangular logo but rather have a warning
to be played only in machines equipped with modern optical drives.

I'm talking about standard audio CDs.

Daniele


** No you are not, cos like anyone you have no idea if a given CD is "standard" or not.

If you bothered to read my post, you would see that it refers to CDs being sold that do not comply despite having the rectangular logo.

The commonest example is CDs that exceed 74mins.



..... Phil

Phil Allison wrote:

** CD players are unsurprisingly designed to play audio CDs made to the
original 1982 Red Book standard. Such disks carry the rectangular logo:
"Compact Disc digital audio".

I'm talking about standard audio CDs.

** No you are not, cos like anyone you have no idea if a given CD is
"standard" or not.

If you bothered to read my post, you would see that it refers to CDs being
sold that do not comply despite having the rectangular logo.

Perhaps you ought to read what you write more carefully in that case.
And perhaps be a little less rude while you're at.

Daniele

D.M. Procida wrote:

-------------------



** CD players are unsurprisingly designed to play audio CDs made to the
original 1982 Red Book standard. Such disks carry the rectangular logo:
"Compact Disc digital audio".

I'm talking about standard audio CDs.

** No you are not, cos like anyone you have no idea if a given CD is
"standard" or not.

If you bothered to read my post, you would see that it refers to CDs being
sold that do not comply despite having the rectangular logo.

Perhaps you ought to read what you write more carefully in that case.


** Really - perhaps you can go **** yourself.


And perhaps be a little less rude while you're at.


** No need exists to be polite to brain dead trolls like you.




..... Phil