Room Volume (Near End) - Extron electronics MediaPort 200 User Manual

Room Volume (Near End)

The master volume control is shown in red and the mix‑points it controls are also shown in
red. This control is used to set the master volume or "listening level" in the local, or "near"
room.
When the MediaPort is used with an external DSP processor, the Line Out is no longer
connected to a sound reinforcement system, but is instead connected to the DSP
processor. In this case, volume control is handled in the DSP processor. Since the Room
Volume control in the MediaPort would no longer be used for room volume, the Room
Volume control should be set to the 0 dB setting, or unity gain, to achieve the best signal to
noise ratio between the MediaPort and the DSP processor.
Also in this case, the "Send to" setting in the USB Communications section should be set to
alter the signals being routed to the line output. The illustrations below show those settings
and the routing that corresponds to those settings.
Figure 5 shows the USB Communications control from the PCS
software Mix page, and the two "Send to" selections:
AEC Ref + Line Out (default)
•
• AEC Ref Only
Figure 10,
each selection. When AEC Ref + Line Out is selected, the USB
Communications signal is routed to the Line Out (and the Ref
Out, which is unused in this scenario). This setting is used when
the Line Out is connected to a sound system, and not to a DSP
processor.
When AEC Ref Only is selected, USB Communications is not
routed to the Line Out, and is sent only to the Ref Out. This
setting is used when the Line Out is connected to a DSP
processor, and not to a sound system. This is so that program
audio and USB communications audio can be managed
separately in the DSP processor. (Alternatively, this setting can also be used to send
program and USB Communications audio to separate sound systems.)
and , on page 19 show the routing scheme for
A B
MediaPort 200 Audio Application Tutorial • MediaPort 200 Signal Flow
FROM FAR END
USB COMMUNICATIONS
SEND TO
AEC Ref + Line Out
AEC Ref Only
MUTE
18