Pardon my ignorance - but wont a graphic equalizer do the same job ??
I've been struggling to explain the sound of this player . However, having tried my hands with different foobar EQ settings, I can say that EQ boosts or cuts selected frequency bands, helping tailor the overall sound to one's liking and, more importantly, help overcome - in a limited way - the problems of the room acoustic. Of course it is no match in this aspect for dedicated room correction applications. An EQ shapes the overall amplitude response, and does not change the overall tonality of the sound much, nor does it drastically improve imaging and sound stage, nor lead to a quantum jump on resolution of micro details, nor improve the texture of bass.
The Bug Head player does a whole lot of signal processing. It also upsamples the source signal, by as much as x8 times upto 384 kHz (provided our DAC is capable of handling that kind of high sampling rate). It is also optimized to take advantage of such processor features like multi threads (hyper threading), make use of dual channel capability in RAM, utilize multi media specific features of the processor like MMX and SSE, cleans/resets the memory to reduce jitter, etc.
The result is a dramatically improved tonality, deep (and I mean deep) sound stage, pin point imaging, imaging width that easily transcends the physical width of the speakers, smooth highs devoid of edginess and etchiness, but most of all a sense of it being unforced and relaxed and open, with delicate mids and highs (I love this aspect of the sound - makes my humble system sound like a much-higher-fi setup).
Provided we tune it right So like most things in life, there's a catch