> people have been trying to duplicated that in digital for decades, and failed. Because decades ago we simply didn't have the processing power to that kind of

> people have been trying to duplicated that in digital for decades, and failed. Because decades ago we simply didn't have the processing power to that kind of DSP. Today, however, you carry that kind of processing power in your pocket. It used to be really hard, because (amongst other things) the oversampling required to avoid digital aliasing. This is not really a big deal anymore, today. Also, it so happens to be the kind of calculation that parallelises very nicely. I can really recommend this video to dispel the myths about what we supposedly can't to today in the digital domain: http://xiph.org/video/vid2.shtml http://xiph.org/video/vid2.shtml (the guy also presents the matter really well, I found it very enjoyable to watch, even if I already knew over half the things he explains). To really make his case, he feeds signals to both a digital and an analogue frequency analyser.