"Jim GM4DHJ ..." wrote in message
...
On 15/08/2019 15:47, Dave Plowman (News) wrote:
When I got my present car a year or so ago, discovered the ICE package
has
an USB input. Ripping CDs to MP3 on a USB stick works a treat.

Did some 30 of my favourite CDs (pretty old) - and all the album, artist,
and track names appeared on the ICE screen.

Decided to add some more yesterday. All the info 'unknown'

Did all this on the same Win7 laptop using WMP (I think) Where did it
find
all the info displayed for the earlier CDs ? And why not for a new ones?

think when you do that the info on tracks etc comes from the internet
check your settings......


It's always amazed me that when the CD standard was devised in the late 70s,
they didn't reserve a few bytes in the disc's track index for the disc name
and artist, and the name of each track. A couple of kB of that data wouldn't
have reduced the amount of music data that could be stored by more than a
second.

But yes, CD-ripping software needs to identify each disc (by the combination
of track lengths, which is why you occasionally get false matches) and then
look up the track details in a master database. iTunes is crowdfunded: if
people fill in the details manually, it gets uploaded to a master database
somewhere that gets downloaded when other people rip the same disc. Other
ripping packages probably use a similar mechanism.