This article helps you fix the Libfaudio0 error that you run into when installing Wine on an older Linux debian-based distribution like Linux Mint 19 or Ubuntu 18.

Fix the dependancy error by downloading the following packages

wget https://download.opensuse.org/repositories/Emulators:/Wine:/Debian/xUbuntu_18.04/amd64/libfaudio0_19.07-0~bionic_amd64.deb
wget https://download.opensuse.org/repositories/Emulators:/Wine:/Debian/xUbuntu_18.04/i386/libfaudio0_19.07-0~bionic_i386.deb

Once these are downloaded you need to installed them with

sudo dpkg -i libfaudio0_19.07-0~bionic_amd64.deb libfaudio0_19.07-0~bionic_i386.deb

Now that we have fixed the dependency error you can proceed with your wine-staging installation. Not this is mainly an error for bleeding edge version of wine from the WineHQ PPA.