ref: ac5d719dd2cf55b3dbc6ca1c087a33eda7c3b1b5
parent: c35561001da2eccbf68c793c523db2fba1563fce
author: rrt <rrt>
date: Mon Nov 13 21:00:37 EST 2006
Add documentation for equalizer effect
--- a/Changelog
+++ b/Changelog
@@ -27,6 +27,7 @@
by command-line arguments. ([email protected])
o More and better self-tests. ([email protected])
o Support Maxis's XA format. (Dwayne C. Litzenberger)
+ o Add equalizer effect (Pascal Giard)
sox-12.18.2
-----------
--- a/README
+++ b/README
@@ -65,6 +65,7 @@
o Apply a flanger effect
o Apply a high-pass filter
o Apply a low-pass filter
+ @ Apply an equalizer effect
o Add masking noise to a signal
o Multi-band compander
o Pan sound between channels
--- a/sox.1
+++ b/sox.1
@@ -863,7 +863,7 @@
moved from inside
your head (standard for headphones) to outside and in front of the
listener (standard for speakers). See
-www.geocities.com/beinges
+http://www.geocities.com/beinges
for a full explanation.
.TP 10
echo \fIgain-in gain-out delay decay \fR[ \fIdelay decay ... \fR]
@@ -877,10 +877,11 @@
Each delay/decay part gives the delay in milliseconds
and the decay (relative to gain-in) of that echo.
Gain-out is the volume of the output.
-.TP
-fade [ \fItype\fR ] \fIfade-in-length\fR
.TP 10
- [ \fIstop-time\fR [ \fIfade-out-length\fR ] ]
+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.
+.TP 10
+fade [ \fItype\fR ] \fIfade-in-length\fR [ \fIstop-time\fR [ \fIfade-out-length\fR ] ]
Add a fade effect to the beginning, end, or both of the audio data.
For fade-ins, this starts from the first sample and ramps the volume of the audio from 0 to full volume over \fIfade-in-length\fR seconds. Specify 0 seconds if no fade-in is wanted.
--- a/src/equalizer.c
+++ b/src/equalizer.c
@@ -171,7 +171,7 @@
static st_effect_t st_equalizer_effect = {"equalizer",
- "Usage: equalizer central-freqency Q gain",
+ "Usage: equalizer central-frequency Q gain",
0,
st_equalizer_getopts, st_equalizer_start,
st_equalizer_flow, st_effect_nothing_drain,