saturator
Files: saturator.h, saturator.c
Soft clip saturating distortion, based on examples from Abel/Berners' Music 424 course at Stanford.
sp_saturator_create(sp_saturator **saturator)
sp_saturator_init(sp_data *sp, sp_saturator *saturator)
sp_saturator_compute(sp_data *sp, sp_saturator *saturator, SPFLOAT *in, SPFLOAT *out)
sp_saturator_destroy(sp_saturator **saturator)
Optional Parameters
drive: Input gain into the distortion section, in decibels. Controls overall amount of distortion.
(Default value: 1.0)
dcoffset: Constant linear offset applied to the signal. A small offset will introduce odd harmonics into the distoration spectrum, whereas a zero offset will have only even harmonics.
(Default value: 0.0)
Inputs
in: input.
Outputs
out: output.
Example Code
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include "soundpipe.h"
typedef struct {
sp_saturator *saturator;
sp_diskin *diskin;
sp_dcblock *dcblk;
} UserData;
void process(sp_data *sp, void *udata)
{
UserData *ud = udata;
SPFLOAT diskin = 0, saturator = 0, dcblk = 0;
sp_diskin_compute(sp, ud->diskin, NULL, &diskin);
sp_saturator_compute(sp, ud->saturator, &diskin, &saturator);
sp_dcblock_compute(sp, ud->dcblk, &saturator, &dcblk);
sp_out(sp, 0, dcblk);
}
int main()
{
UserData ud;
sp_data *sp;
sp_create(&sp);
sp_srand(sp, 1234567);
sp_saturator_create(&ud.saturator);
sp_diskin_create(&ud.diskin);
sp_dcblock_create(&ud.dcblk);
sp_saturator_init(sp, ud.saturator);
sp_diskin_init(sp, ud.diskin, "oneart.wav");
sp_dcblock_init(sp, ud.dcblk);
ud.saturator->drive = 10;
ud.saturator->dcoffset = 4;
sp->len = 44100 * 5;
sp_process(sp, &ud, process);
sp_saturator_destroy(&ud.saturator);
sp_diskin_destroy(&ud.diskin);
sp_dcblock_destroy(&ud.dcblk);
sp_destroy(&sp);
return 0;
}