I am new to this forum. I do a lot of reading of other forums especially on the SDR Radios and in particular to CW operation. The one common thing I am finding is as the speed exceeds about 15WPM the built in Keyers are not able to keep up. who would have thought that an old mode such as CW requires more computer time transom of the more advanced digital means of communications.
This explains why the CW Decoders have some difficulty as the noise increase and the speed increases above about 15WPM. Again proving the human ear connected to a brain wired (years of training) for CW is still faster and better at copying CW, than a current day processor.
VE6LX