Is such a thing even possible?
Is there a possibility to create a virtual sound card and then use for example PyAudio to listen to its output and save it to a file? NOTE that there is no hardware soundcard present on the machine.
I have tried a lot of things, especially
Thanks to both @mjy and @Matthias I have finally managed to figure out the minimal steps to take in order to make the recording work:
sudo apt-get install pulseaudio jackd2 alsa-utils dbus-x11
No need to play with
snd-dummy, no need to create any additional config files... All these things only caused me to lose few hours :( After installing these packages on a clean Ubuntu server installation, I was able to run Python script and capture output audio to a file using PyAudio...