#include <u.h>
#include <libc.h>
#include "abuf.h"

Abuf ain, aout;

void
main(int argc, char *argv[])
{
	double v, x0;

	if(argc < 2)
		sysfatal("usage: lowpass <dbvol>");

	ainit(&ain, 0);
	ainit(&aout, 1);
	
	v = atof(argv[1]);
	v = exp((v / 10) * log(10));
	while(agetd(&ain, &x0) == 1)
		aputd(&aout, x0 * v);
}