#include "pitchdetector.h"
+#define BASE_PITCH 440.0
#define SAMPLE_RATE 22050
#define FFT_LENGTH 4096 /* in samples */
#define PAD_FACTOR 2 /* 1/pf of the FFT samples are real samples, the rest are padding */
std::string freq_to_tonename(double freq)
{
std::string notenames[] = { "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B" };
- double half_notes_away = 12.0 * log2(freq / 440.0) - 3.0;
+ double half_notes_away = 12.0 * log2(freq / BASE_PITCH) - 3.0;
int hnai = int(floor(half_notes_away + 0.5));
int octave = (hnai + 48) / 12;
void print_spectrogram(double freq, double amp)
{
std::string notenames[] = { "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B" };
- double half_notes_away = 12.0 * log2(freq / 440.0) - 3.0;
+ double half_notes_away = 12.0 * log2(freq / BASE_PITCH) - 3.0;
int hnai = int(floor(half_notes_away + 0.5));
int octave = (hnai + 48) / 12;
double freq;
};
static note notes[] = {
- { "E-3", 110.0 * (3.0/4.0) },
- { "A-3", 110.0 },
- { "D-4", 110.0 * (4.0/3.0) },
- { "G-4", 110.0 * (4.0/3.0)*(4.0/3.0) },
- { "B-4", 440.0 * (3.0/4.0)*(3.0/4.0) },
- { "E-5", 440.0 * (3.0/4.0) }
+ { "E-3", BASE_PITCH/4.0 * (3.0/4.0) },
+ { "A-3", BASE_PITCH/4.0 },
+ { "D-4", BASE_PITCH/4.0 * (4.0/3.0) },
+ { "G-4", BASE_PITCH/4.0 * (4.0/3.0)*(4.0/3.0) },
+ { "B-4", BASE_PITCH * (3.0/4.0)*(3.0/4.0) },
+ { "E-5", BASE_PITCH * (3.0/4.0) }
};
void print_spectrogram(double freq, double amp)