stfu/Source/config.h

#if !defined(STFU_CONFIG)
#define STFU_CONFIG

/* Determines output framerate, in times per second. */
#define STFU_AUDIO_FRAME_RATE 44100
#define STFU_AUDIO_CHANNEL_COUNT 2

#define STFU_C4_FREQUENCY 261.63f
#define STFU_A4_FREQUENCY 440.0f
#define STFU_NOTE_UPSCALE_FACTOR 1.059463094f
#define STFU_NOTE_DOWNSCALE_FACTOR 0.943874313f

/* Introduces delayed buffering for purposes of crossfading channels when notes
 * are retriggered, needed for filtering clicks */
#define STFU_CROSSFADE_BUFFER_FRAMES 32

static const float STFU_SCALE[12] = {
  STFU_C4_FREQUENCY,
  STFU_C4_FREQUENCY * STFU_NOTE_UPSCALE_FACTOR,
  STFU_C4_FREQUENCY * STFU_NOTE_UPSCALE_FACTOR *
                  STFU_NOTE_UPSCALE_FACTOR,
  STFU_C4_FREQUENCY * STFU_NOTE_UPSCALE_FACTOR *
                  STFU_NOTE_UPSCALE_FACTOR * STFU_NOTE_UPSCALE_FACTOR,
  STFU_C4_FREQUENCY * STFU_NOTE_UPSCALE_FACTOR *
                  STFU_NOTE_UPSCALE_FACTOR * STFU_NOTE_UPSCALE_FACTOR *
                  STFU_NOTE_UPSCALE_FACTOR,
  STFU_A4_FREQUENCY * STFU_NOTE_DOWNSCALE_FACTOR *
                  STFU_NOTE_DOWNSCALE_FACTOR * STFU_NOTE_DOWNSCALE_FACTOR *
                  STFU_NOTE_DOWNSCALE_FACTOR,
  STFU_A4_FREQUENCY * STFU_NOTE_DOWNSCALE_FACTOR *
                  STFU_NOTE_DOWNSCALE_FACTOR * STFU_NOTE_DOWNSCALE_FACTOR,
  STFU_A4_FREQUENCY * STFU_NOTE_DOWNSCALE_FACTOR *
                  STFU_NOTE_DOWNSCALE_FACTOR,
  STFU_A4_FREQUENCY * STFU_NOTE_DOWNSCALE_FACTOR,
  STFU_A4_FREQUENCY,
  STFU_A4_FREQUENCY * STFU_NOTE_UPSCALE_FACTOR,
  STFU_A4_FREQUENCY * STFU_NOTE_UPSCALE_FACTOR * STFU_NOTE_UPSCALE_FACTOR,
};

#endif