Switch Settings
The eight-position DIP switch on the rear of the EasyUSB Mixer/Amp provides settings to customize the
device for the way you plan to use it. All switches are down for the default configuration, which is
recommended for conferencing using a computer-based application.
Disconnect power before changing the positions of the switches. For some settings, the EasyUSB
Mixer/Amp remains in the mode that was in effect at power-up, and does not respond to a change in the
switch setting until you turn it off and back on again.
Switch
Settings
Switch 1
RS-232 Mode
Down (default):
DTE Mode, 38400 baud. For direct connection to a
DTE device such as a PC's RS-232 port or external controller device.
Up:
For direct connection to a DCE device such as a camera.
Switch 2
VC (Conference) Bridge Mode
Down (default):
Treats the connected PC as the conferencing device.
Up:
Bridges the audio between the USB and an external
videoconferencing unit connected to the line input and output.
Switch 3
Recording Mode
Down (default):
The line output provides only far-end audio.
Up:
For recording local and far-end audio. Sends the audio mix for the
local EasyMic devices and the USB audio from the far-end out the line
output.
Switch 4
Speaker EQ Filter
Down (default):
Speaker EQ filter enabled. Makes voices clearer and
more intelligible.
Up:
Disables the filter.
Switch 5
Level Control
Down (default):
Adjusts for the dynamic range in conference
participants’ voices at the far end, to provide a more consistent speaker
output level.
Up:
Volume is not adjusted to compensate for forceful or quiet
participants.
Switch 6
Audio Delay (lip sync)
Down (default):
No delay.
Up:
Delay speaker output by 25 msec. Use this setting if the video lags
behind the audio noticeably.
Switch 7
Acoustic Echo Cancellation
(AEC)
Down (default):
Enables Acoustic Echo Cancellation on connected
EasyMic microphones.
Up:
Disables Acoustic Echo Cancellation on connected EasyMic
microphones. For non-conferencing applications only.
Switch 8
Firmware update
Down (default):
Normal operation.
Up:
Firmware update mode. With this switch up, use Vaddio Loader to
update the firmware. Normal operation is disabled in firmware update
mode.
Complete Manual for the EasyUSB Mixer/Amp Audio Mixer and Amplifier
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