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SmartNR and Wireless boom


gabi
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For those mixers using the Lectro 400 series for wireless boom, do you use the Smart Noise Reduction algorithm to reduce the hiss produced by the mic preamp or the mic itself? Or do you keep it off to preserve complete transparency?

Thanks in advance,

Gabi Cunha.

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For those mixers using the Lectro 400 series for wireless boom, do you use the Smart Noise Reduction algorithm to reduce the hiss produced by the mic preamp or the mic itself? Or do you keep it off to preserve complete transparency?

Thanks in advance,

Gabi Cunha.

What the heck is "Smart Noise Reduction"? Never heard of that. Why is there hiss in the first place?

-  Jeff Wexler

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Jeff,

Here is Lectrosonics description of what it is:

SmartNRâ„¢

With a noise floor at -120 dBV and a frequency response

to 20 kHz, high frequency noise in the source audio is

more apparent than in conventional wireless systems.

The Smart Noise Reduction algorithm works by attenuating

only those portions of the audio signal that fit a statistical

profile for randomness or “electronic hiss.” Because

it isn’t simply a sophisticated variable low pass filter as

in earlier analog designs, much greater transparency is

obtained. Desired high frequency signals having some

coherence such as speech sibilance and tones are not

affected.

The Smart NR algorithm has three modes, selectable

from the front panel LCD. When switched OFF, no noise

reduction is performed. When switched to NORMAL, the

factory default setting, enough noise reduction is applied

to remove most of the hiss from the mic preamp

and some of the hiss from lavaliere microphones. When

switched to FULL, enough noise reduction is applied to

remove most of the hiss from nearly any signal source of

reasonable quality, assuming levels are set correctly at

the transmitter.

Gabi,

I do not use the  so called "Smart NR" feature on the Lectrosonic receivers - meaning I leave it "Off".

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