I agree with Steve -- having retired from a career in pro audio and
broadcasting, I know quite a lot about audio processing. Manfred's
description is requirements is wildly exaggerated, and Jim Thompson's
processing rig is wretched excess. It's the sort of thing I might do in
a broadcast station for the mental midgets who do most of the talking,
but never for ham radio.
If you're working close to a well-chosen microphone and rolling off the
low end, 10 dB of compression is quite good for ham radio. I have a
closet full of world class microphones and signal processing gear to to
with them. I'm a contester and a DXer, and find that I'm quite
competitive with a Yamaha CM500 boom mic headset and that level of
processing, all of which is built into my Elecraft K3. Indeed, I even
push that to the limits by running QRP in most DX contests!
73, Jim K9YC
On Tue,1/10/2017 2:44 PM, Steve Wright wrote:
On 11/01/17 06:53, Manfred Mornhinweg <manfred@ludens.cl> wrote:
The problem with that is that 10dB of control range is far too small to
accommodate the variations in the audio level coming from the
microphone, as the operator moves closer or farther away, and speaks up
or speaks softly. And to maintain the 10dB compression you first need to
have a stable audio signal. So, in order to achieve that 10dB
compression, you need to place this compressor after an automatic gain
control system
Operators are cleverer than that. It's easy to keep an eye on the
metering and keep the Po and the ALC in the ballpark - that's just
normal use of a SSB radio - for those who get it anyway.
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