Radio effect in Audacity
So recently I needed to figure out how to take some dialogue recorded in person and make it sound like it was being heard over the radio. There's no built in effect for that, but on a bulletin board someone suggested notch filtering 1000-3500 Hz as radio's do the same thing- that gets you in the ball park but it misses the distortion and noise and crackle of a radio. For that I used the 'satan maximizer' effect that came in the large set of ladspa plugins that work in Audacity. With a lot more tuning and research on the type of radio I wanted to imitate I could probably do better, but short of that it at least communicates to the viewer the intention of the effect without being perfect.