In article ,
"Arny Krueger" wrote:

"MiNE 109" wrote in message


http://www.rane.com/par-e.html

"EQ ( equalizer )A class of electronic filters designed to augment or
adjust electronic or acoustic systems. Equalizers can be fixed or
adjustable, active or passive . Indeed, in the early years of
telephony and cinema, the first equalizers were fixed units designed
to correct for losses in the transmission and recording of audio
signals. Hence, the term equalizer described electronic circuits that
corrected for these losses and made the output equal to the input.
Equalizers commonly modify the frequency response of the signal
passing through them; that is, they modify the amplitude versus
frequency characteristics."

Signal, not sound.

Sound is a signal.

Electronic filters don't work directly on sound.

Sound is not an electrical signal.