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BLACK
BOX
BBR
64
MADI
&
BBR
64
DANTE
RECORDER
- User Manual v3.0
Page | 31
Linking multiple BlackBox Recorders together
It is possible to link multiple BlackBox MADI or DANTE Recorders together to make
recordings with more than 64 channels, or to make redundant copies by duplicating
the signal path completely. Each BlackBox Recorder will still require its own USB2 disk
drive as only 64 channels of data will be recorded to each drive.
As stated earlier in this manual, ensuring that the units are synchronised with both
the clocking and starting sample of each recording being locked together is vital for
being able to replay the material later in a DAW environment. However, in a
BBR64MADI system it is vital that the audio data is properly recovered from the
incoming data stream. You will therefore want to use MADI or DANTE as your
reference clock.
The BBR will then use the S/PDIF link (labelled “
Ext Clk
” on the RCA sockets on the
rear panel) to pass control data and timecode information between the master unit
and the slave(s). The Master unit embeds this control data and timecode into the
sub-code of the SPDIF data stream. In this mode the digital audio clock signal
between units is ignored. The Slave units can either be daisy chained together from
the Master unit, or preferably be fed their clocking and control signals from a
distribution amplifier. You will need short RCA (phono) jumper cables to connect
each subsequent unit.
Using an AES/EBU Distribution Amplifier
Master
Ext Clk Out
feeds
Distribution Amplifier input
Distribution Amplifier
feeds
Ext Clk In
on
all
slave units
Daisy Chaining Units
Master
Ext Clk Out
feeds
Slave1
Ext Clk In
Slave1
Ext Clk Out
feeds
Slave2
Ext Clk In
Slave2
Ext Clk Out
feeds
Slave3
Ext Clk In
Slave3
Ext Clk Out
not used.
In the SETUP; CONTROL menu, select
Link Mode
. Select
Master
for the recorder you
want to act as the master controller (which will always record channels 1-64). The
Slave units should be set to
Slave
. When linking machines, you can easily exceed the
two digit track numbering scheme so the BBR64MADI and BBRDANTE systems
automatically adopt a three digit track number scheme when switched into master /