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Copyright © NAGRAVISION S.A. 2005-2009
April 28, 2009
A few guidelines should be considered:
For journalism / interview work it is
unnecessary to use PCM linear. Generally
MPEG 1 Layer II is used and the
compression / bit rate is generally defined
by the broadcaster.
For music / effects PCM linear is the best
quality although MPEG at a high bit rate is
probably good enough and gives faster
download time.
For ultra long recordings use a very low bit
rate, where quality will be “Dictaphone”
quality.
Some important things to remember:
-
Some computers will not play MPEG 1 Layer II compressed files without an appropriate
audio editing software. Typically some versions of the Windows Media player fall into this
category.
-
Audio CD’s will only accept 44.1 kHz linear PCM if they are to be played on a standard CD
player.
-
Download speed from the machine to the computer is at a fixed bit rate and the full memory
(in whatever format) will take about 13 minutes to empty. This could correspond to almost 3
hours of PCM linear or equally 68h of MPEG (as an example). Looking at it from the other
direction, 1 hour of recording in PCM will take approx 5 minutes.
15 MP2 OR MP3 IMPORT / PLAYBACK
MP2 or MP3 audio files can be imported via USB. To playback, select the corresponding file and
press play.
Note:
The name of each file to be imported must not be modified except if the same filename exist
already.