Category : Files from Magazines
Archive   : CUJ9309.ZIP
Filename : 1109090A
{
float out1, out2; /* filter state variables */
float a1, b1, b2; /* filter coefficients */
} resdesc;
static void Avoid_Underflow(resdesc *o)
{
/* clamp state variables */
if(o->out1>-0.0000000001f
&& o->out1<0.0000000001f)
o->out1 = 0.0f;
if(o->out2>-0.0000000001f
&& o->out2<0.0000000001f)
o->out2 = 0.0f;
}
/* assumes coefficients are constant throughout block */
void Resonator(resdesc *f , int n, float *out,
int stride, float *in, int istride )
{
float ym;
int j;
j=0;
for(j=0;j
ym = f->b1 * f->out1 + f->b2 * f->out2
+ f->a1 * in[j*istride];
f->out2 = f->out1;
f->out1 = ym;
out[j*stride] = ym;
}
Avoid_Underflow(f);
}
Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!
This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.
But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/