Rane ECS RaneWare - Manual (Page 7)

RW Manual-7
Mixer
Mixer
This selects one of six ECM 82e Mixers.
Output button
This toggles the ECM 82e’s Mix Out between on (green
indicator, depressed button, audio unmuted) or off (gray
indicator, raised button, audio muted). This is useful to
temporarily turn off all of the Mics on a certain Mixer(s).
Echo Canceller
Each Mixer may contain an optional Acoustic Echo
Canceller. The Echo Canceller checkboxes control the
operation of the Echo Canceller — only if it is installed.
Bypass: Checking only this box bypasses the Echo
Canceller. It is best to bypass the Echo Canceller during
setting the microphone level. If the ECA 2 is not installed, the
Echo Canceller will automatically be bypassed.
Suppression
An echo canceller can only reduce the echo down to the
background noise of the near end room. Suppression is used
to further reduce the echo. The three suppression choices
give the installer some flexibility in matching the ECM 82e to
the room’s requirements.
Moderate will be appropriate for most rooms. Soft offers
less suppression and Strong offers more. Since suppression
affects the subjective quality of a room, experimentation is
the best method to determine which setting is best for a given
room.
Mixer Page
NOMM Mode
NOMM stands for Number of Open Mics (per Mixers).
Most automatic mic mixers have a NOM operation mode. By
keeping track of the Number of Open Mics, automatic mic
mixers can automatically adjust the gains of the open mics to
maintain the gain before feedback margin of a system. This
NOM operation avoids the feedback that can occur as more
and more mics are gated on by keeping the total gain of all
gated mics constant.
However, unlike other automatic mic mixers, the ECM
82e NOMM Mode operates differently. For example, in
conferencing applications, when the chairman talks, she likes
to be heard. Most auto mic mixers would turn down the
chairman’s gain by 3 dB for each doubling of open Mics. The
NOMM Mode of the ECM 82e Mixer keeps the loudest Mic
at its current gain setting, while subsequently gated Mics do
not gate fully on. This prevents the current talker’s Mic from
turning down as others talk, cough or burp.
When NOMM Mode is checked, the loudest talker’s Mic
gain is left alone, while subsequent talkers’ Mics gate on
using the NOMM calculation which maintains unity gain.
NOMM also performs limiting by reducing the gate-on
level, if detected above 0 dBr.
Typical default value: On (checked). NOMM must be off
while setting the Mic gains.