ref: 2eb3d41612dedb0c53862a8f83484039c40467e8
parent: 4099c15c3770f1975d5ebea232d8568b7c0de0a8
author: rrt <rrt>
date: Tue Nov 14 16:38:15 EST 2006
Better docs for equalizer effect, thanks to Pascal Giard
--- a/sox.1
+++ b/sox.1
@@ -878,8 +878,10 @@
and the decay (relative to gain-in) of that echo.
Gain-out is the volume of the output.
.TP 10
-equalizer \fIcentral-frequency\fR \fIQ\fR \fIgain\fR
-Apply an equalizer effect. \fIcentral-frequency\fR gives the central frequency in Hz, \fIQ\fR is the Q-factor (see http://en.wikipedia.org/wiki/Q_factor), and \fIgain\fR is the gain or attenuation in dB.
+equalizer \fIcentral\-frequency\fR \fIQ\fR \fIgain\fR
+Apply an equalizer effect which allows you to modify the amplitude (\fIgain\fR) of a signal at and around (\fIQ\-factor\fR) a central frequency (\fIcentral\-frequency\fR), leaving all other frequencies untouched (unlike regular bandpass/bandreject filters).
+
+\fIcentral\-frequency\fR gives the central frequency in Hz, \fIQ\fR is the Q\-factor (see http://en.wikipedia.org/wiki/Q_factor), and \fIgain\fR is the gain or attenuation in dB.
This effect supports the \fI-o\fR option (see above).
.TP 10