private void Raise_NotesDetected(Note[] notes)
{
EventHandler<NotesDetectedEventArgs> h = NotesDetected;
if (h == null) return;
h(this, new NotesDetectedEventArgs(notes));
}
private Feedback GetPitchFeedback(Note goalNote, Note closestNote)
{
if (goalNote.Semitone == closestNote.Semitone)
return new GoodPitchFeedback();
int diff = closestNote.Semitone - goalNote.Semitone;
return new BadPitchFeedback(diff);
}
private Note FindClosestNote(Note goalNote, IList<Note> playedNotes)
{
Note closestNote = playedNotes[0];
double minDiff = Math.Abs((closestNote.startTime - goalNote.startTime).TotalSeconds);
foreach (Note playedNote in playedNotes) {
double diff = Math.Abs((closestNote.startTime - goalNote.startTime).TotalSeconds);
if (diff < minDiff) {
minDiff = diff;
closestNote = playedNote;
}
}
return closestNote;
}
public void NoteThread()
{
while (_detecting) {
i++;
if (i > 12)
i = -12;
Note note = new Note() { frequency = 440 + i, startTime = DateTime.Now, endTime = DateTime.Now + TimeSpan.FromSeconds(0.1) };
Raise_NotesDetected(new Note[1] { note });
Thread.Sleep(50);
}
}
public void NoteThread()
{
while (_detecting) {
if (i > 12)
i = 0;
//int semitone = i + 48;
int semitone = i + 48;
i++;
//Note randomNote = new Note() { Semitone = semitone, startTime = DateTime.Now, endTime = DateTime.Now + TimeSpan.FromSeconds(0.1) };
//_noteQueue.Enqueue(randomNote);
Note note = new Note() { Semitone = semitone, startTime = DateTime.Now, endTime = DateTime.Now + TimeSpan.FromSeconds(0.1) };
//_noteQueue.TryDequeue(out note);
Raise_NotesDetected(new Note[1] { note });
Thread.Sleep(200);
}
}
private void SimpleDetectNotesImproved()
{
while (!_stopDetecting)
{
FFTPower fftCalc;
if (!_fftSource.FFTQueue.TryPeek(out fftCalc))
continue;
if (powerBins == null)
powerBins = new double[AudioCapture.AudioCaptureSettings.BufferSize * AudioCapture.AudioCaptureSettings.BufferModifier];
freq = 0;
max = 0;
index = 0;
_relativePower = 0;
if (xorPowerBins == null)
xorPowerBins = new double[_xorPowerBins.Length];
currentTotalPower = powerBins.Sum();
//Buffer.BlockCopy(_xorPowerBins, 0, xorPowerBins, 0, _xorPowerBins.Length * sizeof(double));
Array.Clear(xorPowerBins, 0, xorPowerBins.Length);
for (int i = 0; i < ((_sampleRate / 2) / _step); i++)//(fftCalc.PowerBins.Length / 2); i++)
{
if ((i == 0) || ((i * _step) < 75))
powerBins[i] = 0;
else
powerBins[i] = (fftCalc.PowerBins[i] * (1 - xorPowerBins[i]));
if (powerBins[i] < _noiseFloor)
{
powerBins[i] = 0;
}
_relativePower = powerBins[Math.Max(i - 1, 0)] + powerBins[Math.Max(i + 1, 0)] + powerBins[Math.Max(i, 0)];
if ((max < _relativePower))
{
max = _relativePower;
index = i;
}
else if (max > _relativePower)
{
if (index > 1)
{
for (int j = index * 2; (j < (((_sampleRate / 2) / _step) - 2)) || (j < index * 6); j = j + index)
{
//xorPowerBins[j - 2] = 1;
xorPowerBins[j - 1] = 1;
xorPowerBins[j] = 1;
xorPowerBins[j + 1] = 1;
//xorPowerBins[j + 2] = 1;
}
}
}
//powerBins[i] = powerBins[i] / fftCalc.PowerBins.Max() * 1000;
}
//_noiseFloor = 0.7 * _lastMax;
//freq = DetectFrequency2(powerBins, index);
freq = DetectFrequency_Mirrored(fftCalc.PowerBins, index - _subPeaks, index + _subPeaks);
//System.Diagnostics.Debug.Write(freq + "\n");
Note[] notes = new Note[1] { new Note() };
notes[0].startTime = DateTime.Now;
notes[0].frequency = freq;
//Console.WriteLine(notes[0].closestRealNoteFrequency);
NoteQueue.Enqueue(notes);
//if (NoteQueue.Count > _maxNoteQueueSize)
//{
// Note[] dqnotes;
// NoteQueue.TryDequeue(out dqnotes);
//}
}
}
private void SimpleDetectNotes()
{
while (!_stopDetecting)
{
FFTPower fftCalc;
if (!_fftSource.FFTQueue.TryPeek(out fftCalc))
continue;
double[] powerBins = new double[AudioCapture.AudioCaptureSettings.BufferSize * AudioCapture.AudioCaptureSettings.BufferModifier];
fftCalc.PowerBins.CopyTo(powerBins, 0);
double freq = 0;
//Start Note Detection
double currentTotalPower = powerBins.Sum();
//if (currentTotalPower < _previousTotalPower) // if our power is less than thy previous power by at least MAX_POWER_DECAY, ignore the rest
//{
// freq = 0;
//}/
//else
//{
double max = 0;
int index = 0;
for (int i = 0; i < powerBins.Length / 2; i++)
{
powerBins[i] = powerBins[i] * _xorPowerBins[i];
if (powerBins[i] < _noiseFloor)
powerBins[i] = 0;
if ((max < powerBins[i]) && (i > 75))
{
max = powerBins[i];
index = i;
}
powerBins[powerBins.Length - 1 - i] = 0;
}
index = index;
max = max;
freq = DetectFrequency_Mirrored(powerBins);
//}
System.Diagnostics.Debug.Write(freq + "\n");
_previousTotalPower = currentTotalPower;
Note[] notes = new Note[1] { new Note() };
notes[0].startTime = DateTime.Now;
notes[0].frequency = freq;
//Console.WriteLine(notes[0].closestRealNoteFrequency);
NoteQueue.Enqueue(notes);
if (NoteQueue.Count > _maxNoteQueueSize)
{
Note[] dqnotes;
NoteQueue.TryDequeue(out dqnotes);
}
}
}
private void MultiImpulseDetectNotes()
{
while (!_stopDetecting)
{
FFTPower fftCalc;
if (!_fftSource.FFTQueue.TryPeek(out fftCalc))
continue;
if (xorPowerBins == null)
xorPowerBins = new double[_xorPowerBins.Length];
if (powerBins == null)
powerBins = new double[AudioCapture.AudioCaptureSettings.BufferSize * AudioCapture.AudioCaptureSettings.BufferModifier];
if (freqArray == null)
freqArray = new double[6];
if (indexArray == null)
indexArray = new int[6];
if (maxArray == null)
maxArray = new double[6];
if (_powerBinsDelta == null)
_powerBinsDelta = new double[powerBins.Length];
if (_powerBinsOld == null)
_powerBinsOld = new double[powerBins.Length];
if (impulseArray == null)
impulseArray = new double[6];
_relativePower = 0;
Array.Clear(xorPowerBins, 0, xorPowerBins.Length);
for (int p = 0; p < 6; p++)
{
maxArray[p] = 0;
freqArray[p] = 0;
indexArray[p] = 0;
impulseArray[p] = 0;
for (int i = (int)(stringFreq[p, 0] / _step); i < (stringFreq[p, 1] / _step); i++)
{
powerBins[i] = (fftCalc.PowerBins[i] * (1 - xorPowerBins[i]));
powerBins[i + 1] = (fftCalc.PowerBins[i + 1] * (1 - xorPowerBins[i + 1]));
_powerBinsDelta[i] = (fftCalc.PowerBins[i] - _powerBinsOld[i]) * (1 - xorPowerBins[i]);
if (powerBins[i] < _noiseFloor)
{
powerBins[i] = 0;
powerBins[i + 1] = 0;
_powerBinsDelta[i] = 0;
}
_relativePower = powerBins[Math.Max(i - 1, 0)] + powerBins[Math.Max(i + 1, 0)] + powerBins[Math.Max(i, 0)];
if ((maxArray[p] < _relativePower))
{
maxArray[p] = _relativePower;
indexArray[p] = i;
if (_powerBinsDelta[i] > 0)
impulseArray[p] = _powerBinsDelta[i];
//xorPowerBins[i - 2] = 1;
//xorPowerBins[i - 1] = 1;
//xorPowerBins[i] = 1;
//xorPowerBins[i + 1] = 1;
//xorPowerBins[i + 2] = 1;
}
else if (maxArray[p] > _relativePower)
{
if (indexArray[p] > 1)
{
for (int j = indexArray[p]; (j < (((_sampleRate / 2) / _step) - 2)) && (j < indexArray[p] * 6); j = j + indexArray[p])
{
xorPowerBins[j - 2] = 1;
xorPowerBins[j - 1] = 1;
xorPowerBins[j] = 1;
xorPowerBins[j + 1] = 1;
xorPowerBins[j + 2] = 1;
}
}
stringFreq[Math.Min((p + 1), 5), 0] = (index * _step);
break;
}
}
}
for (int j = 0; j < 6; j++)
{
if (j == 0)
_impulseCutoff = _lowImpulseCutoff;
else
_impulseCutoff = _highImpulseCutoff;
if (impulseArray[j] > _lowImpulseCutoff)
{
Note[] notes = new Note[6];
for (int i = 0; i < 6; i++)
{
freqArray[i] = DetectFrequency_Mirrored(fftCalc.PowerBins, indexArray[i] - _subPeaks, indexArray[i] + _subPeaks);
notes[i] = new Note();
notes[i].startTime = DateTime.Now;
notes[i].frequency = freqArray[i];
}
Raise_NotesDetected(notes);
break;
}
}
Buffer.BlockCopy(fftCalc.PowerBins, 0, _powerBinsOld, 0, _powerBinsOld.Length * sizeof(double));
//NoteQueue.Enqueue(notes);
}
}
private void MultiDetectNotes()
{
while (!_stopDetecting)
{
FFTPower fftCalc;
if (!_fftSource.FFTQueue.TryPeek(out fftCalc))
continue;
if (xorPowerBins == null)
xorPowerBins = new double[_xorPowerBins.Length];
if (powerBins == null)
powerBins = new double[AudioCapture.AudioCaptureSettings.BufferSize * AudioCapture.AudioCaptureSettings.BufferModifier];
if (freqArray == null)
freqArray = new double[6];
if (indexArray == null)
indexArray = new int[6];
if (maxArray == null)
maxArray = new double[6];
_relativePower = 0;
Array.Clear(xorPowerBins, 0, xorPowerBins.Length);
for (int p = 0; p < 6; p++)
{
maxArray[p] = 0;
freqArray[p] = 0;
indexArray[p] = 0;
for (int i = (int)(stringFreq[p, 0] / _step); i < (stringFreq[p, 1] / _step); i++)
{
powerBins[i] = (fftCalc.PowerBins[i] * (1 - xorPowerBins[i]));
powerBins[i + 1] = (fftCalc.PowerBins[i + 1] * (1 - xorPowerBins[i + 1]));
if (powerBins[i] < _noiseFloor)
{
powerBins[i] = 0;
powerBins[i + 1] = 0;
}
_relativePower = powerBins[Math.Max(i - 1, 0)] + powerBins[Math.Max(i + 1, 0)] + powerBins[Math.Max(i, 0)];
if ((maxArray[p] < _relativePower))
{
maxArray[p] = _relativePower;
indexArray[p] = i;
//xorPowerBins[i - 2] = 1;
//xorPowerBins[i - 1] = 1;
//xorPowerBins[i] = 1;
//xorPowerBins[i + 1] = 1;
//xorPowerBins[i + 2] = 1;
}
else if (maxArray[p] > _relativePower)
{
if (indexArray[p] > 1)
{
for (int j = indexArray[p]; (j < (((_sampleRate / 2) / _step) - 2)) && (j < indexArray[p] * 6); j = j + indexArray[p])
{
xorPowerBins[j - 2] = 1;
xorPowerBins[j - 1] = 1;
xorPowerBins[j] = 1;
xorPowerBins[j + 1] = 1;
xorPowerBins[j + 2] = 1;
}
}
break;
}
}
}
Note[] notes = new Note[6];
for (int i = 0; i < 6; i++)
{
freqArray[i] = DetectFrequency_Mirrored(fftCalc.PowerBins, indexArray[i] - _subPeaks, indexArray[i] + _subPeaks);
notes[i] = new Note();
notes[i].startTime = DateTime.Now;
notes[i].frequency = freqArray[i];
}
Raise_NotesDetected(notes);
//NoteQueue.Enqueue(notes);
}
}
private void ImpulseDetectNotes()
{
while (!_stopDetecting)
{
FFTPower fftCalc;
if (!_fftSource.FFTQueue.TryPeek(out fftCalc))
continue;
if (powerBins == null)
powerBins = new double[AudioCapture.AudioCaptureSettings.BufferSize * AudioCapture.AudioCaptureSettings.BufferModifier];
if (_powerBinsDelta == null)
_powerBinsDelta = new double[powerBins.Length];
if (_powerBinsOld == null)
_powerBinsOld = new double[powerBins.Length];
if (xorPowerBins == null)
xorPowerBins = new double[_xorPowerBins.Length];
Array.Clear(xorPowerBins, 0, xorPowerBins.Length);
freq = 0;
max = 0;
index = 0;
_relativePower = 0;
impulse = 0;
for (int i = (int)(stringFreq[0, 0] / _step); i < (stringFreq[5, 1] / _step); i++)
{
powerBins[i] = (fftCalc.PowerBins[i] * (1 - xorPowerBins[i]));
powerBins[i + 1] = (fftCalc.PowerBins[i + 1] * (1 - xorPowerBins[i + 1]));
_powerBinsDelta[i] = (fftCalc.PowerBins[i] - _powerBinsOld[i]) * (1 - xorPowerBins[i]);
if (powerBins[i] < _noiseFloor)
{
powerBins[i] = 0;
powerBins[i + 1] = 0;
_powerBinsDelta[i] = 0;
}
_relativePower = powerBins[Math.Max(i - 1, 0)] + powerBins[Math.Max(i + 1, 0)] + powerBins[Math.Max(i, 0)];
if ((max < _relativePower))
{
max = _relativePower;
index = i;
if (_powerBinsDelta[i] > 0)
impulse = _powerBinsDelta[i];
}
else if (max > _relativePower)
{
if (index > 1)
{
for (int j = index; (j < (((_sampleRate / 2) / _step) - 2)) && (j < index * 6); j = j + index)
{
xorPowerBins[j - 2] = 1;
xorPowerBins[j - 1] = 1;
xorPowerBins[j] = 1;
xorPowerBins[j + 1] = 1;
xorPowerBins[j + 2] = 1;
}
}
break;
}
}
Buffer.BlockCopy(fftCalc.PowerBins, 0, _powerBinsOld, 0, _powerBinsOld.Length * sizeof(double));
_impulseCutoff = _lowImpulseCutoff;
//_impulseCutoff = _highImpulseCutoff;
if (impulse> _lowImpulseCutoff)
{
Note[] notes = new Note[6];
for (int i = 0; i < 6; i++)
{
freq = DetectFrequency_Mirrored(fftCalc.PowerBins, index - _subPeaks, index + _subPeaks);
notes[i] = new Note();
notes[i].startTime = DateTime.Now;
notes[i].frequency = freq;
}
Raise_NotesDetected(notes);
}
}
}
private void RunFreeform(string _chord)
{
// Fix this too
int index;
Note[] prevNote = new Note[3];
Note[] curNote;
int noteCount = 0;
while (_runningChordFreeform)
{
if (!chordSource.ChordQueue.TryPeek(out curNote))
continue;
noteCount = 0;
for (int j = 0; j < ChordDictionary.ChordList.Count; j++)
{
for (int i = 0; i < curNote.Count(); i++)
{
bool test = (ChordDictionary.ChordList[j].Notes.Where(n => n.ClosestRealNoteFrequency == curNote[i].ClosestRealNoteFrequency).Count() > 0);
if (test == true)
noteCount++;
}
if ((noteCount / ChordDictionary.ChordList[j].Notes.Count) >= 0.5)
{
_chord = ChordDictionary.ChordList[j].CharValue.ToString();
break;
}
else
{
_chord = "";
}
}
if (_chord == "")
continue;
Application.Current.Dispatcher.Invoke(
DispatcherPriority.Render,
new Action<string>(updateStaff),
_chord);
}
}
public void SetNote(Note note)
{
StartTime = note.startTime;
EndTime = note.endTime;
Frequency = note.frequency;
ClosestRealNoteFrequency = note.frequency;
}
private Feedback GetTimingFeedback(Note goalNote, Note closestNote)
{
double diff = (closestNote.startTime - goalNote.startTime).TotalSeconds;
double absDiff = Math.Abs(diff);
string slowOrFastStr = diff > 0 ? "slow" : "fast"; // user is slow if difference is positive (played after goal note)
if (absDiff < _goodTiming) {
return new GoodTimingFeedback(diff) { Note = closestNote };
} else if (absDiff < _mediumTiming) {
return new MediumTimingFeedback(diff) { Note = closestNote };
} else {
return new BadTimingFeedback(diff) { Note = closestNote };
}
}