22 individual CW software KEYBOARDs are sending a CW text file from 500 hertz up to 11Khz
separated individually by 500 hertz from one signal to another
to pick a CW SPEED/signal that you would like to copy by ear - use your SDR
- here is a quick example of doing that here with a LINUX SDR APP
the SDR isolates each signal, and the SDR usually has a bandpass/bandwidth filter you can use to keep the other signals out of the target signal and you will only hear the 1 signal you choose from the other 21 signals that surrounds it....