Text-to-speech presentation

Data Sources:

https://cloud.google.com/text-to-speech#section-2 (here used)
https://docs.aws.amazon.com/polly/latest/dg/voicelist.html

User software:

gnome-sound-recorder (record mp3 from internal audio)
pavucontrol (select 'Monitor of Build-In Audio Analog Stereo' in Tab 'Recording, appears only when record is active in gnome-sound-recorder)
kdenlive (video editing software)

Example:

/home/schwatke/docs/2021/ILRS_DFPSC_2021_virtual_tour