user@computer:~$ sudo apt install libpulse-mainloop-glib0/bionic libpulse0/bionic libpulsedsp/bionic
Reading package lists... Done
Building dependency tree
Reading state information... Done
Selected version '1:11.1-1ubuntu7.4' (Ubuntu:18.04/bionic-updates [amd64]) for 'libpulse-mainloop-glib0'
Selected version '1:11.1-1ubuntu7.4' (Ubuntu:18.04/bionic-updates [amd64]) for 'libpulse0'
Selected version '1:11.1-1ubuntu7.4' (Ubuntu:18.04/bionic-updates [amd64]) for 'libpulsedsp'
Suggested packages:
  pulseaudio
The following packages will be DOWNGRADED:
  libpulse-mainloop-glib0 libpulse0 libpulsedsp
0 to upgrade, 0 to newly install, 3 to downgrade, 0 to remove and 0 not to upgrade.
Need to get 319 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://ftp.ussg.iu.edu/linux/ubuntu bionic-updates/main amd64 libpulsedsp amd64 1:11.1-1ubuntu7.4 [31.9 kB]
Get:2 http://ftp.ussg.iu.edu/linux/ubuntu bionic-updates/main amd64 libpulse-mainloop-glib0 amd64 1:11.1-1ubuntu7.4 [22.1 kB]
Get:3 http://ftp.ussg.iu.edu/linux/ubuntu bionic-updates/main amd64 libpulse0 amd64 1:11.1-1ubuntu7.4 [265 kB]
Fetched 319 kB in 2s (139 kB/s)
dpkg: warning: downgrading libpulsedsp:amd64 from 1:11.1-1ubuntu7.5 to 1:11.1-1ubuntu7.4
(Reading database ... 363892 files and directories currently installed.)
Preparing to unpack .../libpulsedsp_1%3a11.1-1ubuntu7.4_amd64.deb ...
Unpacking libpulsedsp:amd64 (1:11.1-1ubuntu7.4) over (1:11.1-1ubuntu7.5) ...
dpkg: warning: downgrading libpulse-mainloop-glib0:amd64 from 1:11.1-1ubuntu7.5 to 1:11.1-1ubuntu7.4
Preparing to unpack .../libpulse-mainloop-glib0_1%3a11.1-1ubuntu7.4_amd64.deb ...
Unpacking libpulse-mainloop-glib0:amd64 (1:11.1-1ubuntu7.4) over (1:11.1-1ubuntu7.5) ...
dpkg: warning: downgrading libpulse0:amd64 from 1:11.1-1ubuntu7.5 to 1:11.1-1ubuntu7.4
Preparing to unpack .../libpulse0_1%3a11.1-1ubuntu7.4_amd64.deb ...
Unpacking libpulse0:amd64 (1:11.1-1ubuntu7.4) over (1:11.1-1ubuntu7.5) ...
Setting up libpulse0:amd64 (1:11.1-1ubuntu7.4) ...
Setting up libpulse-mainloop-glib0:amd64 (1:11.1-1ubuntu7.4) ...
Setting up libpulsedsp:amd64 (1:11.1-1ubuntu7.4) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...