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For each of these 2 technologies there are two groups of control parameters: main control parameters and
channel control parameters. The configuration parameters are explained below.
GAIN SHARING
The main control parameters:
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GAIN: target gain for the AutoMixer output.
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SLOPE: determines how aggressive the profit sharing is. Low slope settings make the
module behave like a conventional mixer. High slope settings cause the inputs to be
attenuated more deeply for inactive microphones, similar to a gate. A value of around 2.0
provides the most natural sound effect in most applications.
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RESPONSE: speed at which the AutoMixer operates. A faster response time may be
necessary if different speakers are speaking in rapid succession, however, too fast a
response time may cause unwanted "pumping" of the audio between spoken words.
Conversely, too slow a response may cut off the initial sounds of words. However, the
very nature of the GAIN SHARING algorithm provides a faster on-time than off-time to
help prevent this effect, even at very fast Response settings. Practice shows that the most
natural effect will occur with a Response value between 100 ms and 1,000 ms.
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MUTE: mutes the AutoMixer output. It will turn red when activated.
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ON/OFF: enables or disables the AutoMixer module.
The channel control parameters:
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GAIN (slider control): channel gain to indicate to the GAIN SHARING algorithm the desired
relative level of each channel.
NOTE: the channel gain is after the input to the AutoMixer engine. The channel level can
influence the gain setting of other channels even if the fader is turned all the way down.
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PRIORITY: channel priority level. This value feeds the AutoMixer engine and can influence
automatic gain adjustment decisions. Priority values range from 0 (lowest priority) to 10
(highest priority).
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AUTOMIXER: enables or disables the channel in the AutoMixer module. It will turn blue
when activated.
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MUTE: mutes the channel. It will turn red when activated.
NOTE: the mute is after the input to the AutoMixer engine. A muted channel can influence
the gain setting of other channels in the AutoMixer.
IMPORTANT:
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Both the GAIN channel gain and the MUTE channel mute in the AutoMixer module are
after the AutoMixer engine in the signal chain. Therefore, as long as the channel is participating in the
AutoMixer it will influence the algorithm, even if the channel is muted or the gain is at minimum.
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If 2 or more channels have the same signal level, the channel with higher priority will get more
automatic gain. Note that great care must be taken when assigning priority values. It is best to
avoid large differences between channel priorities, e.g. 0 and 10. If the channel with a value of 10
can recognise even background noise as valid content, then channels with a priority of 0 could be
masked all together and never added to the AutoMixer mix.
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This effect worsens with higher SLOPE values. If it is necessary to have such different priorities, it is
recommended to add a DSP GATE or EXPANDER module to the higher priority channels to eliminate
unwanted noise.
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