Hi Geoffrey,
and thank you for this quick reply.
I apologize for the lack of background information on the system I am using. As an IT person, I should have thought of that ...
For the sake of completeness I attach them below.
To the news:
I had not changed the routing of the scarlett.
The backing track was played with rhythmbox, the "live performance" comes via the instrument microphone on the scarlett's XLR connection (input 2).
I listen to the whole thing with headphones via the direct monitor output
It looks as if the signal recorded by Audacity has been too weak so far.
After I had turned up the playback volume in the pulseaudio control significantly, something audible did indeed end up in the recorded audio track.
So now "only" the task remains to adjust the volumes of the backing track and the microphone recording of my sax attempts to each other. Perhaps this will be the subject of another call for help ...
Again: thx a lot for your efforts and help
With the knowledge I have gained so far, I will help a friend this weekend to get his scarlett solo 4rth gen running on his linux PC
Best Regards,
Joe
Distribution: LinuxMint
Version: 21.3
Kernel version: 5.15.0-102.112-generic 5.15.148
Kernel Messages
...
[ 2.508773] usb 3-1: New USB device found, idVendor=1235, idProduct=8218, bcdDevice= 8.43
[ 2.508776] usb 3-1: New USB device strings: Mfr=1, Product=3, SerialNumber=2
[ 2.508778] usb 3-1: Product: Scarlett Solo 4th Gen
[ 2.508779] usb 3-1: Manufacturer: Focusrite
[ 2.508780] usb 3-1: SerialNumber: S###ZZZ###BD##
[ 2.636259] usb 3-2: new low-speed USB device number 3 using xhci_hcd
...
[ 27.599555] usb 3-1: Focusrite Scarlett Gen 4 Mixer Driver 5.15-v1.0 enabled (pid=0x8218); report any ...
[ 27.624614] usb 3-1: Firmware version 2115
[ 27.627421] usbcore: registered new interface driver snd-usb-audio
Audio System