Feurio Questions & Answers - Explanation of
Terminology:
Track-at-Once recording
When doing a Track-at-Once recording, in contrast to a "Disc-at-Once"
recording, the writing laser is switched off after every Track.
When recording the next Track , the laser is
recalibrated and a new recording is initialized. The CD's table of contents is
not written until the last Track has been written.
However, a CD actually only has a single track( the same as a vinyl record).
By switching off the laser and recommencing with the writing process, this track
is now interrupted - you have to imagine it as if the track on a vinyl record
was interrupted after one song - of course the needle would "get stuck" here.
On CDs it is not quite as bad, as usually in this case the error correction comes
into action.
Why doesn't Feurio!® use Track-at-Once?
- Defective areas between the tracks:
As described above, in Track-at-Once mode a "defective" area is created between
the tracks. In most cases the error correction of the CD player comes into action
here, i.e. the CD player can "save itself" over the "defective" area. But you
may also find that the CD player gets "stuck" at that point. In particular on
"Disc-Mans" with "Anti-Shock-Protection" we have been able to observe problems:
The "Anti-Shock-Protection" is based on always reading a few seconds "ahead"
so that if the read head temporarily loses the track due to being jogged, data
can be read from the memory with e.g. 20 seconds of "Anti-Shock-Memory". It thus
already gets to the end of the track (and thus into the defective area) while
playing the 20 second BEFORE the end of the track. Some Disc-Mans are so "irritated"
by this defective data that they do not play the rest of the track correctly.
Whereby it should be noted that this is NOT a fault of the Discman - a Track-at-Once
CD is not a correct audio CD! (see next paragraph)
- A Track-at-Once CD is not a correct Audio-CD!
Due to the defective areas between the tracks (see above), a Track-at-Once CD
no longer complies with the given standard in the "Red Book" (the standard for
audio CDs) - thus strictly speaking it is no longer a "CD Digital Audio". So
it is not a fault of the CD-Player if it doesn't play a CD of this kind.
This also means that the CD is not "Mastering-capable", i.e. it is well possible
that the pressing factory will return your CD to you.
- Index-0 length can not be set at random
The Index-0 length on a Track-at-Once recording can not be set at random. Some
CD recorders only permit 2 seconds, but other maybe other values but e.g. 0 seconds
exactly is not offered by any recorder (because of the principle) (even if you
can set 0, a small Index-0 piece will always be burned)
- An exact copy of the Track Layout is not possible
With a Disc-at-Once recording, Feurio!® can determine the start positions
of the individual tracks exactly. With a Track-at-Once recording the start position
of the tracks are slightly shifted - due to the laser being switched off at the
end of the track.
Why is this a problem? Quite simple: The CD recognition of all CD databases (e.g.
the Feurio!® database, the CDDB-database but also the CD recognition of e.g.
audio CD players with title input) is based on using the start position of the
individual tracks a kind of check sum is calculated - the "Disc-ID". With a Disc-at-Once
copy, the track start position are copied exactly - the Disc-ID remains the same.
But with a Track-at-Once recording this is not the case - the CD can no longer
be found in the CDDB database (however sometimes it can still be found by using
an "unfocussed" search).
- It is not possible to have tracks which run into each other
It is not possible to have tracks which run into each other (e.g. Live recordings,
Non-Stop mixes) - there is always a small gap between the tracks.
- No "Index-0-Music" is possible
It is also not possible to burn music into the Index-0 area
- No CD-Text is possible
CD Text doesn't work with Track-at-Once either
- Index-Markers often not possible
Setting index markers is also not possible in Track-at-Once mode on several recorders.
See also:
Questions and Answers - Explanation of terminology
Questions and Answers - Main Page
You are the 1450. visitor of this page (today: 2)