Winrad used to look at 40m CW first with the LSB filter then switched to the CW filter and centred on the carrier.

Winrad used to look at MT63 or another multi tone data mode and PSK31 on 40m. Four PSK31 contacts are occupying less bandwidth than the one multi tone signal.

The Realtek HD in my Dual Core Laptop first then the Delta44 in my Celeron Desktop. Both no audio input 96KHz sampling viewed with Winrad software.
Compare the S Meter readings and listen to chatter then   more...nothing.  less

Winrad used to take a look at 40m data and SSB signals.

The Delta44 sound card installed in my desktop, no audio input.
Just listen to all that nothing.

Realtek HD sound card used in my laptop, no audio input, Winrad software to analyse the spectrum.
Just listen to the computer chatting to itself.