$ sudo apt-get update
$ sudo apt-get install libportmidi0 

libportmidi0 is installed in your system.

Make ensure the libportmidi0 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libportmidi0 *

You will get with libportmidi0 package name, version, architecture and description in a table

libportmidi0 package basic information: