Activeforever Plextalk PTR2 Digital DAISY Player and Recorder - Manual (Page 106)

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With either of these types of CD, when using PLEXTALK, additional audio
can be added to the disc until it is full. Use of PLEXTALK's editing
functions to cut sections of the recording, will not free up space on either
type of disc, it only makes those pieces of audio 'invisible' to the listener.
You can only free up space on a CD-RW disc by using PLEXTALK's erasing
function or by reformatting the CD-RW using a computer.
In addition to categorising CDs by whether they can be used more than
once or not, they can also be categorised by whether they are "data" CDs
or "music" CDs. Data CDs can be used on a computer to create many
different types of finished CD such as file backups, picture CDs, Audio File
CDs and so on. In PLEXTALK, data CDs can only be used to create DAISY
format recordings. If you want to create a Music CD, which can be played
in a standard CD player, you need to use blank Music CD-R or CD-RW discs.
In PLEXTALK, Music CDs cannot be used to make DAISY recordings and
can only be used to make Music CDs. PLEXTALK will automatically detect
the type of CD that you insert. Blank Music CDs tend to be more
expensive than blank data CDs.
On all CDs, on one of the sides, a small ridge can be found about 1
centimetre away from the centre hole. The side with the ridge is where
the data is burned. Data cannot be burned to the disc properly if there are
scratches or fingerprints on the area outside the ridge.
CAUTION: Before using a CD for recording, check for dirt, fingerprints or
scratches on the surface of the disc. If there are any marks, clean the CD
using the supplied soft cloth.
CAUTION: Whenever you erase a CD-RW on a PC, make sure that you
choose the "Full erase" setting.
16.2.2. About CF cards.
In PLEXTALK, you can use a CF card to record and edit DAISY titles and you
can erase and rerecord as many times as you want.
PLEXTALK will work with CF cards with a range of capacities. Before
purchasing an additional CF card for use with PLEXTALK, you should
ensure that it is compatible. You are advised to read the section called
"Recommended CF cards" in Appendix A, or contact your PLEXTALK dealer
for advice.