On 6/25/2023 11:05 PM, Richard wrote:
I love my K3s, warts and all, but I want a way to tailor incoming audio for
better readability in special cases. Yes, I know about the built-in function,
but that's hardly comfortable for quick, on-the-fly adjustments.
There are only 2 possibilities for best readability -- one for CW, which
is to cut the bands away from where you like the Pitch, the other for
Voice modes, which is max cut for the three lowest bands, 6 dB cut of
the fourth (400 Hz center), and 3-6 dB boost of the two top bands. This
favors the part of the spectrum that makes the greatest contribution to
speech intelligibility and minimizes that parts (below 400 Hz) that
don't. This is nothing new -- AT&T Bell Labs, probably the greatest
engineering institution on the planet for most of the 20th century,
figured out the science of this in the earliest days of telephony.
73, Jim K9YC
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