int get_sound_input_cap_bits();
0 = audio input not supported 8 = eight bit audio input is supported 16 = sixteen bit audio input is supported 24 = both eight and sixteen bit audio input are supportedExample:
   cap = get_sound_input_cap_bits();
   if (cap == 0) {
      /* Ugh, no audio input supported? */
   } else {
      if (cap & 8) {
         /* We have eight bit audio input. */
      }
      if (cap & 16) {
         /* We have sixteen bit audio input. */
      }
   }