Mute Ceiling Microphones on Cisco Sx20 via Touchpanel

[aabidrasool]

Hi All

We have a scenario that my user wants to use 3rd Party ceiling Microphones with LED (Red for Mute & Green for Unmute) via Cisco Touch Control mute and unmute option. 

We do not have any control System.

We are using Baimp Audia Flex.

Appreciate if any one can advise.

Regards

Aabid

[Patrick Sparkman]

The only microphones the codec itself can control and give led status indication of mute/unmute is the Precision Microphone 20.  In order to control the Baimp Audio Flex microphones, you'll need a control system and use the in-room control functions of the Touch 10.

[aabidrasool]

HI Patrick

Thank you very much for the reply.

I had read some where that if the GPIO of the DSP will be used then we can control the rrequired but unfortuanetly i cannot find the link now.

[Wayne DeNardi]

Are you aware that Biamp does not recommend the use of Ceiling Microphones, especially where AEC is used.  See AEC_in_Audia_and_Nexia

Ceiling Microphones

While commonly used, ceiling mics are problematic for the following reasons:

• They present the worst conditions for acoustic coupling between the microphone and the speaker, as both may be physically mounted in the same surface.
• ERL values will very likely be positive since acoustic echo loss between the loudspeaker and microphone is minimal - the mics are very close to the speakers.
• Poor voice pickup due to the distance from and off-axis position relative to the participant's mouths.
• Poor gain before feedback due to low voice volume relative to ambient room noise - due to distance from the mic.
• Poor voice pickup due to low voice volume relative to ambient room noise - due to distance from the mic.
• Poor Signal-to-Noise Ratio (SNR) due to low voice volume relative to ambient room noise - due to distance from the mic.

For all these reasons, and from our years of experience with AEC systems, Biamp Systems does not recommend using ceiling microphones if it is practical to use individual mics for participants. However we recognize the aestheic bias toward micing from above and will work to help get the best results possible with all configurations. Understanding the inherent issues and common problems faced with these installations is an important step for every designer/installer.

Wayne
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