CW COPY by ear PRACTICE on the iCW Mumble Server - 29 speeds from 20 to 105 wpm - use SDR to choose

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Dec 23, 2022, 11:01:47 AM12/23/22

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video demo of the setup and how it works...

grab your sound card SDR and try it out if you like..

ill leave it running today for as long as possible...

ROOM 5 iCW/mumble

...

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Dec 24, 2022, 8:09:01 AM12/24/22

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STILL room to add 4Khz WIDE Lower Side Band audio to totally fill up the available Mumble ELF/ULF/VLF spectrum...

here is a voice test at 19.5Khz LSB 4Khz wide bandwidth

LO-fi, but still readable - 4Khz wide LSB - next to 29 CW signals from 500 hertz to 14.5 Khz ...

OPUS codec audio processing suffers at this high of an audio frequency

when trying to modulate LSB near the upper edge limit of mumble's 20Khz brick wall...

PODCAST AUDIO used to modulate the 19.5 Khz LSB signal is from:

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Dec 24, 2022, 8:12:21 AM12/24/22

to iCW - internet CW

Just a snap shot showing the FULL MUMBLE ELF,ULF,VLF spectrum - with 29 CW signals AND now including 4Khz wide LSB VOICE at 19.5Khz

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