The signal is delayed by 30ms, so it is not possible to keying CW from the local paddle. Na osciloskopu vidime zlute originalni CW tecky o rychlosti 28 WPM a na modrem prubehu audio zpozdene pres Bluetooth modul VS-3.

The telegraph signal rings/rattles unpleasantly in high tones. Audio is at the limit of applicability. It would probably be enough to add a simple low pass filter. The emphasis on high tones can be seen on the next sweep measurement in SSB mode.

Signal delay in SSB mode does not matter. The audio accentuates the higher notes, but it's not annoying. On the image from the oscilloscope we see a yellow signal representing the original audio from the headphone output, which slightly suppresses the higher tones. The blue waveform shows the audio from the Icom VS-3 Bluetooth module, which significantly emphasizes high notes and adds noise.