Master Volume Controls; Mix To Far End; Usb Output Level (To Far End) - Extron electronics MediaPort 300 User Manual

Master Volume Controls

A master volume is a control that adjusts multiple sub-controls and is used to set a listening
level that is appropriate for the end-user. In
color-coded to associate the master control with the sub-controls that are affected and can
be found in the Mix tab of the Extron Product Configuration Software (see
on page 45. In this case, all of the sub-controls are points in the mix matrix, or "mix-points."
Master Volume controls shown are as follows:
Near End mix (captive screw output)
•
•

Mix to Far End

•
•
Mix to Far End
The following controls facilitate a mix of mic and program audio that is sent to the far end via
USB to the computer (see
Mic Volume — This master volume control and the mix-points it controls are shown in
purple. The mono mic signal is routed to both the left and right paths of the USB output.
Program Volume — This master volume control and the mix-points it controls are shown in
green.
Typically, mic audio level is set higher than program audio. It is recommended that the Mic
level control be set to 0 dB, or unity gain, which is the optimal level sent to the USB Out and
received by the computer. Program volume is then set relative to the mic volume, providing
a good listening level such that the far end does not need to make an adjustment to their
volume control to compensate for discrepancies between mic and program volume levels.
NOTE: The ducker can be used so that when the microphone (a talker) and program

USB Output Level (to far end)

The USB output group master can be controlled on the PCS Audio > Output tab. This
group master controls the overall level of Mic and Program mix that are configured on the
PCS Audio > Mix tab.
PC (USB) (see figure 3 on page 10, blue)
NOTES:
• PC (USB) levels and mutes are synchronized bidirectionally with the connected
USB host device. Level or mute adjustments from the USB host are reflected
on the MediaPort 300; similarly, level and mute adjustments on the MediaPort
300 are reflected at the PC host device.
• By default, the range of adjustment available to the PC host ranges from 0 to
-28.3 dB, but this can be adjusted using the USB HID audio range mapping
SIS command (see
HDMI and Line 2 (optional) program audio (red)
Mic/Line 1 for mic audio (purple)
HDMI and optionally Line 2 program audio (green)
figure 3
material are active simultaneously, speech takes precedence over program so that
speech can remain intelligible (see
MediaPort 300 HDMI and Audio to USB Scaling Bridge • Theory of Operation
figure 3 on page 8, master volume controls are
page 57).
on page 10).
Ducking
on page 45 for more information).
Mix Page DSP
12