Grass Valley Sonata Series MADI 2010 - Manual (Page 34)

34 Sonata Series — Planning and Installation Manual
Section 2 — Planning Guide
It is possible to feed more than one reference to the Sonata AES-to-MADI
converter, but the unit will select and use the reference highest in priority
order as shown above.
Dolby E and Dolby Digital signals
The Sonata AES-to-MADI converters are designed to correctly pass Dolby
E and Dolby Digital signals. In order to do this, the signals MUST be syn-
chronous with the reference that is being used. The easiest way to guar-
antee synchronization is to use the same reference signal for both the
Sonata converter and any associated Dolby E devices. Dolby E devices
usually use standard Video Black for a reference. However, two different
references can be used simultaneously, such as Video Black for Dolby E and
AES (DARS) reference for the Sonata box only if they are both locked to a
common source
. The Sonata converter passes the entire AES status block
intact, which is required for correct Dolby E operation. Many MADI
devices do not pass AES status block intact.
Note In order to pass non-audio signals, the signals MUST BE synchronous with
the reference that is applied to the Sonata converter.
Stand-Alone Use
The Sonata converter can be used as a stand-alone application as long as it
is locked to a reference.
Interfacing to Maestro
As shown in Figure 1 , the Sonata AES-to-MADI converters can be used
with the Maestro Master Control switcher for two primary purposes:
• Expansion of the basic 8-channel I/O of the Maestro frame to 16-chan-
nels
• Addition of Background C and D inputs, and addition of Mix over C
and D inputs, not available on the standard Maestro’s rear panel. The
Background C inputs are required for full DVE functionality of the
Maestro product.
Note Maestro supports a maximum of two direct Audio Mixer sources, whether or
not the Audio Mixer MADI expansion is enabled. To connect directly to
Maestro without Sonata, use the BNCs labeled
Over A and Over B .