This tutorial is on Mac OS and it shows how to test the plugin using Juce Plug-in Host (min 41:28 of the tutorial). For this Charles adds a File Player Audio Unit which are not existent in Linux, this plugin allows to imports a mp4 file. Then he imports an audio file and connect the output of the audio player to the input of the SimpleEQ plugin made in the tutorial (as you can see in the screenshot bellow).
the thing is that if I open a demo for example in the same way, I get the makefile created…since I don’t have the make file I’m stuck on the compilation part for Linux of the AudioFilePlayer Plugin