Heavy Metal Anyone?

Let’s not debate semantics.

Generically, the term ’audio filter’ can be applied to mean anything which changes the timbre or harmonic content of an audio signal.

Uh, what you just did is precisely to debate semantics. Just so you know.

So your idea of not debating semantics is to say "changes the timbre or harmonic content" can mean adds or subtracts. After all either one is a change. Therefore a filter can also add. Even though we know filters are used to sift through and remove.

No wonder you don't want to debate.

I don't know for sure, but words from a person who doesn't or hasn't played a musical instrument.
Just a silly, unenlightened comment.

Back to Black Sabbath and Art Blakey on the table.
Any system setup right, all music sounds good.

As someone who has identified as a musician, I beg to differ.  Heavy metal is full of fast triplets to hide a lack of prowess.   I do listen to some, but I never heard a HM drummer who compares in technique to Buddy Rich or Terry Bozzio, nor a guitarist who holds a candle to Nita Strauss or Steve Vai.  Not to mention the electric bass of Flea  (OK, he might be heavy metal), and the acoustic bass of Ron Carter.  And don't even ask me about the best guitarist I ever saw, Segovia.  I do agree about jazz guitarists.  The are usually pretty lame, and yes, i do know listen to Herb Ellis.  Piano: Oscar!    Trumpet and Sax: ignored in HM. 

millercarbon:  There is something new yuou should try.  It is called google.  If you google "heavy metal" and "Django Reinhardt", you would discover that heavy metal is believed to have begun no sooner than the late 1960s and reached a mass audience in the 1970"s.  Django died in 1953.

Is your source on Mark Knopfler, Roy Clark, or Chet Atkins the same as your source on Djanggo Reinhardt, who died in 1953, just a bit before the introduction of Heavy Metal?
Don't worry though. I used to believe what I heard, especially when it coincided with what might likd to believe.  It is an easy habit to break. 

GOOGLE!