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PC World 2008 February
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PCWorld_2008-02_cd.bin
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audio-video
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reaper
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reaper2028-install.exe
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Effects
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Pitch
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pitchdown
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2007-12-03
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1KB
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53 lines
// This effect Copyright (C) 2004 and later Cockos Incorporated
// License: GPL - http://www.gnu.org/licenses/gpl.html
desc: pitch down
slider1:1<0,6,1>octaves down (0..6)
slider2:0<0,11,1>semitones down (0..11)
slider3:0<0,99,1>cents down (0..99)
slider4:100<4,500,10>chunk size (ms)
slider5:1<0.001,1>overlap size (0..1)
slider6:0<-120,6,1>wet mix (dB)
slider7:-120<-120,6,1>dry mix (dB)
@slider
lbufsize=bufsize; bufsize=(srate*0.001*slider4)&65534;
lbufsize!=bufsize ? bufpos=0;
scl=2 ^ (-(slider1 + slider2/12 + slider3/1200));
rilen=(max(scl,0.5)*bufsize)|0;
rrilen=((scl*bufsize)|0)*2;
slider5=min(1,max(slider5,0));
rspos=slider5*(bufsize-rilen);
invbs=1/rspos;
drymix=2 ^ (slider7/6);
wetmix=2 ^ (slider6/6);
@sample
ss0=spl0; ss1=spl1;
hbp=((bufpos * scl)|0)*2;
// pre read these before writing
s0r=rrilen[hbp];
s1r=rrilen[hbp+1];
(bufpos*2)[0]=spl0;
(bufpos*2)[1]=spl1;
bufpos < rspos ?
(
// mix
sc=bufpos*invbs;
spl0=hbp[0]*sc + s0r*(1-sc);
spl1=hbp[1]*sc + s1r*(1-sc);
) : (
// straight resample
spl0=hbp[0];
spl1=hbp[1];
);
(bufpos+=1) >= bufsize ? bufpos=0;
spl0 = spl0*wetmix + ss0*drymix;
spl1 = spl1*wetmix + ss1*drymix;