Grass Valley Maestro Master Control v.2.4.0 - Manual (Page 230)

MAESTRO User Manual 226
Audio Controls
5.1 Mode
In the 5.1 mode the Maestro Processor automatically maps the first six
channels of the audio source selected to the first six monitor outputs if the
source is a 5.1 surround audio group type. For stereo or mono audio group
types, the Processor will map the signals to the speakers as normal stereo
or mono sources.
If the Maestro is configured with only a stereo pair of monitor speakers,
then all 5.1 sources are mixed down to normal stereo.
Lt-Rt Mode
In the Lt-Rt mode the Maestro Processor will create a Left total/Right total
mixdown of surround audio group types, or pass normal stereo signals to
the left and right speakers.
Stereo Mode
In the Stereo mode the Maestro Processor will create a normal Stereo
mixdown of surround audio group types, or pass a normal stereo version
of the audio source selected (regardless of the original format unless it is a
mono source) and present it to the left and right speakers.
Mono Mode
In the Mono mode the Maestro Processor will create a monophonic version
of the audio source selected regardless of the original format and present it
to either the center speaker or the left and right speakers depending upon
the Monitor Speaker Configuration selected.
Monitor Level Control
A level control is located directly below the eight-character readout. This is
the volume control for the monitor outputs and operates as an attenuator
with 0.5 dB resolution. The eight-character readout is used to display the
monitor level. The range of the control is from OFF (or MUTE) to 0.0 dB. At
0.0 dB the monitor outputs pass the selected source without attenuation
and all values less than that are displayed as “-XX.X dB.” Normal moni-
toring level should be between -20 dB and -12 dB for best performance.
An alternate display mode is available in the Audio Options table, in the
Monitor Level Display column. In this format, the readout displays a posi-
tive number that is meant to be calibrated for actual SPL (Sound Pressure
Level).