These symptoms points that you have no getting two channels (stereo) from your cheap audio dongle. A lot of these are mono and the Softrock need the two channels to do the math correctly. I have 2 apparently identical USB audio dongles and only one is stereo, the mono one was the cheaper.
When you select one of this audio dongles check that the Mic/line input is specified as stereo.
The spike that you see in the center is caused by noise near the 0 freq (DC), only good quality audio cards can minimize this spike.
Regards,
Ignacio EB4APL
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El 11/06/2021 a las 23:45, Bob G4IOG escribió:
After several trials, I had to use USBSoftrock command to check configuration of USB on my Raspberry Pi 3B.
I use a really cheap USB audio dongle to get the rx into the Pi.
That all working I re-installed Quisk which is wonderfully difficult to get working, but managed to make it work.
Biggest problem was making the audio work, and soon as I selected 'Pulse' I started to get the waterfall to display.
So now my Ensemble II is working on a Raspberry PI. I still have a spike at the centre of the screen, and it looks like it
always shows a reflexion of one half of the waterfall in the other half like the spike in the middle is a mirror. Maybe that is a problem between Quisk and
the latest versions of Python as I believe it was written for Python2.
So much progress made and shows it can work on a Raspberry PI3B.
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