Here’s a list of installers/code and when they were known to work on Ubuntu 20.04.
Spotify (Sept 2020)
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 4773BD5E130D1D45 echo deb http://repository.spotify.com stable non-free | sudo tee /etc/apt/sources.list.d/spotify.list sudo apt-get update && sudo apt-get install spotify-client
Audacity (sept 2020)
sudo apt install audacity
sudo add-apt-repository ppa:ubuntuhandbook1/audacity sudo apt update sudo apt install audacity
more about that here http://ubuntuhandbook.org/index.php/2020/09/audacity-2-4-2-ppa-for-ubuntu-20-04-18-04/