Sul manuale del Plextor 760 ho trovato quanto segue.
This drive is equipped with VariRec (Variable Recording) technology, a
unique feature offered by Plextor that allows you to manually adjust the
drive’s laser power during the recording process. VariRec operates both
for DVD and CD recording.
[B]NOTE[/B]: [I]In order for you to actually perform the adjustment, VariRec must be supported by the recording software youâ€™re using. PlexTools
Professional is one recording application that supports VariRec.[/I]
Being able to adjust the laser power during the recording process can
have some definite advantages. For instance, depending on the
capabilities of your specific audio equipment, you may be able to
change the sound quality of your recordings to suit the equipment. Or
you may be able to correct compatibility problems that occur when
playing discs on certain audio players or older CD-ROM drives.
How the Default VariRec Setting Is Determined
In most cases you donâ€™t have to worry about setting VariRec. The
setting is 0 (zero) by default, and this usually works best. This default
setting is determined by a combination of steps:
[li]First, we test many types of recordable DVDÂ±R and CD-R media in our factory to determine the best write strategy (laser power and other factors) for that media. [/li]> [li]We include a catalog of the tested media and their write strategy in your driveâ€™s firmware. (This catalog is updated when you update your drive by downloading new firmware from the Plextor web site.)[/li]> [li]When you insert a recordable disc into your drive, Plextorâ€™s PoweRec technology automatically identifies the manufacturer, model, and special features of the media, then adjusts the laser power and writing speed so theyâ€™re at the optimum settings for that disc.[/li]> [li]The drive uses OPC (Optimum Power Control) to further fine-tune the laser power setting to the specific disc that is in your drive. [/li]> [li]The combined values of the pre-defined write strategies, along with the OPC test results, create the default VariRec setting of zero.[/li]> [/ol]
Changing the VariRec Setting
VariRec lets you increase or decrease the laser power setting by up to 4
degrees in either the positive or negative direction. You can make these
changes for DVD+R 4X and 2.4X, DVD-R 4X and 2X, and CD-R 4X
and 8X CD-DA/data writing. VariRec also lets you change the write
strategy to match the dye profile of your disc. You can make these
changes to do comparison testing with your DVD or CD player to find
the setting that best suits you.
Changing the laser power and write strategy changes the characteristics
of the audio or data being written. For audio, you can hear these changes
during playback, although what you hear will depend on speaker quality,
audio settings, and environment.
[B]To use PlexTools Professional to change VariRec settings for writing:[/B]
[li]Place a blank DVDÂ±R or CD-R disc in the PX-716. [/li]> [li]In the PlexTools menu bar, select Drive Settings. You see the tabs for drive settings. [/li]> [li]Select the VariRec tab. You see the VariRec window. [/li]> [li]To turn VariRec on for recording, place a check mark in the Enable VariRec box. [/li]> [li]Move the slider to adjust the laser power in either the plus or minus direction. [/li]> [li]Click the Recording Speed drop-down menu to choose the recording speed: for example, 8X or 4X for a CD-R. [/li]> [li]Click the Recording drop-down menu to choose the recording strategy: for example, for a CD-R you can choose Default, Azo, Cyanine, Phthalocyanine A, etc. [/li]> [li]Use AudioCD Maker or CD/DVD-ROM Maker from PlexTools Professional to create a disc layout.[/li]> [li]If necessary, in the list of recording options, make sure the Enable VariRec box is checked and continue recording.[/li]> [/ol]
Your disc is recorded with the new laser strategy.
Important Facts about VariRec
[li]Use VariRec with DVDÂ±R or CD-R discs. [/li]> [li]VariRec writes in either Track-at-Once (TAO) or Disc-at-Once (DAO) mode. [/li]> [li]VariRec writes data or CD-DA (digital audio) on recordable media at lower speeds (for example, 4X or 8X for CD-R), rather than at the full speed of the drive. For this reason, data or audio recording using VariRec takes substantially longer than a standard audio recording.[/li]> [/ul]
Comunque sul sito Plextor dovrebbe esserci da qualche parte anche il manuale delle plextools. Forse li trovi altri dettagli