HHB comm CDR-882 - Manual (Page 44)

Advanced Features & Operation
 CDR-882 User Manual Version 1.0 www.hhb.co.uk
Multi-Machine + DiscSpan Operation
DISCSPAN mode may be used in conjunction with Multi-Machine
mode to make a recording of a very long programme across up
to eight blank discs, each in a different drive, across four CDR-
882s. This may be useful where unattended recording has to
be performed. Blank discs may be loaded into both drives of all
machines in the system, recording initiated (perhaps with the
Time Interval option for Track ID selected) and the system then
left.
This mode is set by selecting DiscSpan on the Master machine,
which automatically selects DiscSpan on the Slaves. It is
recommended that audio is cascaded between machines via an
S/PDIF link, to ensure frame-accurate synchronisation between
discs in different machines. The S/PDIF link also passes CD Text
and Track ID data for identing the discs in a sequence and locks
the audio clocks in different machines together.
Recording in the Master machine will proceed as per the
Single-Machine DiscSpan operation described at page 39, with
the first-selected drive “handing over” to the other when its
disc becomes full. As the disc in the other drive approaches
maximum capacity, recording will now pass to the first-selected
drive in the second machine, with fade-in, overlap and fade-out
all being observed correctly as if the third disc was in the first
machine. At the end of the third disc, recording passes to the
other drive of the second machine.
This process will continue until the system runs out of machines
and/or blank discs, or is stopped by the operator. At the end of
the second disc in the last machine, the system will look at the
first drive in the first machine. If this has been reloaded with a
blank disc, the recording will continue in that drive. If not, the
recording will end.
Replay of discs recorded in Multi-
DiscSpan Mode
Playback of a sequence of discs recorded on multiple machines
in DiscSpan mode makes use of the S/PDIF digital audio link
between machines. The discs should be loaded into the drives
in the same order in which they were recorded. Audio from the
Master machine is passed to the next machine in the chain
via the S/PDIF interconnection, where it is “mixed” with the
contribution from that machine at the appropriate time. This
mix is passed in turn to the next machine, and so on, until the
full sequence of seamless audio may be obtained from the last
machine in the chain. Fade-out, Overlap and Fade-In are all
observed correctly as in Single Machine DiscSpan playback.
There is no restriction to replaying a sequence of 2+ discs
recorded in Multi-Machine DiscSpan mode on just one machine.
The only requirement is that the discs are loaded into the two
drives of the one machine in the correct order, as would be the
case with Single Machine DiscSpan playback.
CDR- Multi-Machine & DiscSpan Operation