I recently acquired a ton of acapellas, some were true accapellas (had NO music at all), some were done with a vocal eliminator (had some music in the background but sounded like garbage), then I noticed what appeared to be a third type that had very little music but was very clean and clear. It was too clear for it to be a vocal eliminator so my question is...Does anyone know how this can be done? Maybe some type of inverting tracking program?(Trust me, it's too clear to be the old invert the instrumental and play them back together trick!)