Update of /cvsroot/audacity/audacity-src/plug-ins
In directory 23jxhf1.ch3.sourceforge.com:/tmp/cvs-serv24094
Modified Files:
highpass.ny lowpass.ny
Log Message:
fix stated rolloff values only half the slope actually applied
Index: lowpass.ny
===================================================================
RCS file: /cvsroot/audacity/audacity-src/plug-ins/lowpass.ny,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -d -r1.6 -r1.7
--- lowpass.ny 4 Jun 2008 19:10:41 -0000 1.6
+++ lowpass.ny 6 Nov 2008 08:45:10 -0000 1.7
@@ -4,10 +4,10 @@
;categories "http://lv2plug.in/ns/lv2core#LowpassPlugin";
;name "Low Pass Filter..."
;action "Performing Low Pass Filter..."
-;info "by Dominic Mazzoni, modified by David R. Sky\nReleased under terms of
the GNU General Public License Version 2\nAttenuates high frequencies above
your specified cutoff frequency.\nHigher rolloff values give a sharper
attenuation of frequencies above\nthe cutoff frequency. If using a rolloff of 6
dB, a [q] value greater than\ndefault 0.7 increases resonance ['ringing'] of
the cutoff frequency and\ncould result in clipping.""
+;info "by Dominic Mazzoni, modified by David R. Sky\nReleased under terms of
the GNU General Public License Version 2\nAttenuates high frequencies above
your specified cutoff frequency.\nHigher rolloff values give a sharper
attenuation of frequencies above\nthe cutoff frequency. If using a rolloff of
12 dB, a [q] value greater than\ndefault 0.7 increases resonance ['ringing'] of
the cutoff frequency and\ncould result in clipping.""
-;control rolloff-choice " Rolloff [dB per octave]" choice " 3 dB, 6 dB,12
dB,18 dB,24 dB" 0
-;control q " Filter quality [q] for 6 dB rolloff" real "" 0.7071 .1 20
+;control rolloff-choice " Rolloff [dB per octave]" choice " 6 dB,12 dB,24
dB,36 dB,48 dB" 0
+;control q " Filter quality [q] for 12 dB rolloff" real "" 0.7071 .1 20
;control f " Cutoff frequency [Hz]" real "" 1000 1 20000
; note that all Nyquist lowpass functions
@@ -17,32 +17,32 @@
; to deal with stereo selection,
; and dummy q arg for all but lowpass2
-; 3dB/octave
+; 6dB/octave
(defun lp-s (s f q) ; dummy q arg
(lp s f))
-; 6dB/octave
+; 12dB/octave
(defun lowpass2-s (s f q)
(if (arrayp s)
(vector (lowpass2 (aref s 0) f q)
(lowpass2 (aref s 1) f q))
(lowpass2 s f q)))
-; 12dB/octave
+; 24dB/octave
(defun lowpass4-s (s f q) ; dummy q arg
(if (arrayp s)
(vector (lowpass4 (aref s 0) f)
(lowpass4 (aref s 1) f))
(lowpass4 s f)))
-; 18dB/octave
+; 36dB/octave
(defun lowpass6-s (s f q) ; dummy q arg
(if (arrayp s)
(vector (lowpass6 (aref s 0) f)
(lowpass6 (aref s 1) f))
(lowpass6 s f)))
-; 24dB/octave
+; 48dB/octave
(defun lowpass8-s (s f q) ; dummy q arg
(if (arrayp s)
(vector (lowpass8 (aref s 0) f)
@@ -64,7 +64,7 @@
(= (check q 0.1 20) 1))
(strcat error-msg (format nil
"q value ~a lies outside valid range 0.1 to 20
-for your chosen rolloff of 6 dB per octave.
+for your chosen rolloff of 12 dB per octave.
" q))
error-msg))
Index: highpass.ny
===================================================================
RCS file: /cvsroot/audacity/audacity-src/plug-ins/highpass.ny,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -d -r1.6 -r1.7
--- highpass.ny 4 Jun 2008 19:10:41 -0000 1.6
+++ highpass.ny 6 Nov 2008 08:45:10 -0000 1.7
@@ -4,10 +4,10 @@
;categories "http://lv2plug.in/ns/lv2core#HighpassPlugin";
;name "High Pass Filter..."
;action "Performing High Pass Filter..."
-;info "by Dominic Mazzoni, modified by David R. Sky\nReleased under terms of
the GNU General Public License Version 2\nAttenuates frequencies below your
specified cutoff frequency.\nHigher rolloff values give a sharper attenuation
of frequencies below\nthe cutoff frequency. If using a rolloff of 6 dB, a [q]
value greater than\ndefault 0.7 increases resonance ['ringing'] of the cutoff
frequency and\ncould result in clipping."
+;info "by Dominic Mazzoni, modified by David R. Sky\nReleased under terms of
the GNU General Public License Version 2\nAttenuates frequencies below your
specified cutoff frequency.\nHigher rolloff values give a sharper attenuation
of frequencies below\nthe cutoff frequency. If using a rolloff of 12 dB, a [q]
value greater than\ndefault 0.7 increases resonance ['ringing'] of the cutoff
frequency and\ncould result in clipping."
-;control rolloff-choice " Rolloff [dB per octave]" choice " 3 dB, 6 dB,12
dB,18 dB,24 dB" 0
-;control q " Filter quality [q] for 6 dB rolloff" real "" 0.7071 .1 20
+;control rolloff-choice " Rolloff [dB per octave]" choice " 6 dB,12 dB,24
dB,36 dB,48 dB" 0
+;control q " Filter quality [q] for 12 dB rolloff" real "" 0.7071 .1 20
;control f " Cutoff frequency [Hz]" real "" 1000 1 20000
; note that all Nyquist highpass functions
@@ -17,32 +17,32 @@
; to deal with stereo selection,
; and dummy q arg for all but highpass2
-; 3dB/octave
+; 6dB/octave
(defun hp-s (s f q) ; dummy q arg
(hp s f))
-; 6dB/octave
+; 12dB/octave
(defun highpass2-s (s f q)
(if (arrayp s)
(vector (highpass2 (aref s 0) f q)
(highpass2 (aref s 1) f q))
(highpass2 s f q)))
-; 12dB/octave
+; 24dB/octave
(defun highpass4-s (s f q) ; dummy q arg
(if (arrayp s)
(vector (highpass4 (aref s 0) f)
(highpass4 (aref s 1) f))
(highpass4 s f)))
-; 18dB/octave
+; 36dB/octave
(defun highpass6-s (s f q) ; dummy q arg
(if (arrayp s)
(vector (highpass6 (aref s 0) f)
(highpass6 (aref s 1) f))
(highpass6 s f)))
-; 24dB/octave
+; 48dB/octave
(defun highpass8-s (s f q) ; dummy q arg
(if (arrayp s)
(vector (highpass8 (aref s 0) f)
@@ -64,7 +64,7 @@
(= (check q 0.1 20) 1))
(strcat error-msg (format nil
"q value ~a lies outside valid range 0.1 to 20
-for your chosen rolloff of 6 dB per octave.
+for your chosen rolloff of 12 dB per octave.
" q))
error-msg))
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