What sets this frontend for ffmpeg apart from other stereo simulators is it creates an impression of stereo separation. Without trying too hard to be "true" stereo in a gimmicky fashion. More importantly, it produces none of the weird phasing, and/or time delay artifacts. And very little, if any of the tone discoloration, when those others aren't meticulously set up just right. All this is accomplished by using the ffmpeg crossover audio filter to split the sound into 8 frequency bands...