white.h

Audacity是一款用於錄音和編輯聲音的、免費的開放源碼軟體。它可以執行於Mac OS X、Microsoft Windows、GNU/Linux和其它作業系統

sound_type snd_make_white(time_type t0, rate_type sr, time_type d);
sound_type snd_white(time_type t0, rate_type sr, time_type d);
    /* LISP: (snd-white ANYNUM ANYNUM ANYNUM) */

/* CHANGE LOG
 * --------------------------------------------------------------------
 * 28Apr03 rbd all systems now use rand(), based on DM's modifications
 */

#include <stdlib.h>
#include <math.h>

/* rand returns from 0 to RAND_MAX. Scale and offset
 * to get range from -1 to +1
 */
#define rand_scale (2.0/RAND_MAX)