A compressor, that is. Well, bought me a Boss CS-3, which is, I’m told, a good basic unit. Just been playing about with it for an hour or so. Honestly? Well, I can hear a sound change when I play whilst turning it on and off and on and off and…………but exactly what it’s doing to the sound, I’m not sure. OK, single notes seem to ring longer with it on and the sustain above 1/2 but that’s about it. I have by no means a refined ear but, apart from the Level knob increasing and decreasing the volume, (seems to work in tandem with the sustain knob?), the changes seem marginal. I’m heading to YouTube to listen to some demos. Am I missing something, are there some magic settings I don’t know about, do the guitar and amp settings determine the effect the pedal has? Just really looking to be educated in the art of compressing!