Playing a sample on the F030 (in C)

if (Locksnd()==1) {
                  Setmontrack(0); /* set output to first track */
                  Settrack(0,1);  /* set number of tracks to 1 playback */
                  Setmode(res);   /* res: 0=8bit stereo, 1=16bit stereo, 2=8bit mono */
                }
  else printf("Sorry, sound system is locked.");

The following will then play the actual sample...

Soundcmd(value,6);               /* value : determines frequency (see below) */
Setbuffer(mode,sambegin,samend); /* mode: 0=play, 1=record. sambegin/end are addresses */
Devconnect(0,8,0,scale,0);       /* connect DMA play to DAC. scale  determines frequency */
Buffoper(mode);                  /* mode: 0=stop, 1=play, 3=play with loop. */

The frequency is determined by the prescale value. Below is a table which gives the frequency for each value. Any value not listed will give a mute condition.

scale    freq (Hz)   value passed in Soundcmd(value,6);

11        8195              -
 9        9834              -
 7       12292              -
 5       16390              -
 4       19668              -
 3       24585              -
 2       32780              -
 1       49170              -
 0       125??              1
 0       25033              2
 0       50066              3

( - means no effect.)

Unlocksnd();