public ActionResult AudioAndDictation(int resolutionType, string keySignature, double bpm, int numberOfMeasures)
{
// We'll add stuff to the Dictionary and return as JSON.
var dict = new Dictionary <string, string>();
#region Audio
//double bpm = double.Parse(ConfigurationManager.AppSettings["BPM"]);
double quarterNoteMillis = (60 / bpm) * 1000;
TimeSpan quarterNoteDuration = TimeSpan.FromMilliseconds(quarterNoteMillis);
TimeSpan halfNoteDuration = TimeSpan.FromMilliseconds(quarterNoteMillis * 2);
TimeSpan dottedHalfNoteDuration = TimeSpan.FromMilliseconds(quarterNoteMillis * 3);
TimeSpan wholeNoteDuration = TimeSpan.FromMilliseconds(quarterNoteMillis * 4);
// Setup the scale note numbers.
int[] scaleNoteNumbers = new int[] { 38, 39, 41, 43, 44, 46, 48, 50, 51 }; // C Major, with a low TI.
scaleNoteNumbers = NoteHelper.TransposeScaleNoteNumbers(scaleNoteNumbers, keySignature);
// The initial DO.
ISampleProvider wholeDoNote = NAudioHelper.GetSampleProvider(scaleNoteNumbers[1], wholeNoteDuration);
// Four metronome ticks before the transcription part plays.
ISampleProvider[] ticks = new ISampleProvider[4];
string tickFile = HostingEnvironment.MapPath($"~/Samples/Woodblock.wav");
for (int i = 0; i < ticks.Length; i++)
{
ticks[i] = NAudioHelper.GetSampleProviderFromFile(tickFile, quarterNoteDuration);
}
List <string> measureRhythms = GetNoteRhythms();
int randomInt = NoteHelper.GetRandomInt(0, measureRhythms.Count);
string measureRhythm1 = measureRhythms[randomInt];
randomInt = NoteHelper.GetRandomInt(0, measureRhythms.Count);
string measureRhythm2 = measureRhythms[randomInt];
if (numberOfMeasures == 2)
{
while ((measureRhythm1.Split(',').Count() + measureRhythm2.Split(',').Count()) % 2 == 1) // Ensure an even number of notes, so there's always a (reverse) resolution.
{
randomInt = NoteHelper.GetRandomInt(0, measureRhythms.Count);
measureRhythm2 = measureRhythms[randomInt];
}
}
randomInt = NoteHelper.GetRandomInt(0, measureRhythms.Count);
string measureRhythm3 = measureRhythms[randomInt];
randomInt = NoteHelper.GetRandomInt(0, measureRhythms.Count);
string measureRhythm4 = measureRhythms[randomInt];
if (numberOfMeasures == 4)
{
while ((measureRhythm1.Split(',').Count() + measureRhythm2.Split(',').Count() + measureRhythm3.Split(',').Count() + measureRhythm4.Split(',').Count()) % 2 == 1)
{
randomInt = NoteHelper.GetRandomInt(0, measureRhythms.Count);
measureRhythm4 = measureRhythms[randomInt];
}
}
string[] measureRhythmSplit1 = measureRhythm1.Split(',');
int numberOfNotes1 = measureRhythmSplit1.Length;
string[] measureRhythmSplit2 = measureRhythm2.Split(',');
int numberOfNotes2 = measureRhythmSplit2.Length;
string[] measureRhythmSplit3 = measureRhythm3.Split(',');
int numberOfNotes3 = measureRhythmSplit3.Length;
string[] measureRhythmSplit4 = measureRhythm4.Split(',');
int numberOfNotes4 = measureRhythmSplit4.Length;
ISampleProvider[] notes1 = new ISampleProvider[numberOfNotes1];
ISampleProvider[] notes2 = new ISampleProvider[numberOfNotes2];
ISampleProvider[] notes3 = new ISampleProvider[numberOfNotes3];
ISampleProvider[] notes4 = new ISampleProvider[numberOfNotes4];
Queue <int> noteNumberQueue;
switch (resolutionType)
{
case 1:
noteNumberQueue = GetResolutionIntQueue(scaleNoteNumbers, 16, 1); // 16 notes max.
break;
case 2:
noteNumberQueue = GetResolutionIntQueue(scaleNoteNumbers, 16, 2);
break;
case 3:
noteNumberQueue = GetResolutionIntQueue(scaleNoteNumbers, 16, 3);
break;
default:
throw new NotSupportedException($"ResolutionType '{resolutionType}' is not supported.");
}
int[] measureNoteNumbers1 = NoteHelper.PopulateNoteNumbersFromQueue(numberOfNotes1, noteNumberQueue);
int[] measureNoteNumbers2 = NoteHelper.PopulateNoteNumbersFromQueue(numberOfNotes2, noteNumberQueue);
int[] measureNoteNumbers3 = NoteHelper.PopulateNoteNumbersFromQueue(numberOfNotes3, noteNumberQueue);
int[] measureNoteNumbers4 = NoteHelper.PopulateNoteNumbersFromQueue(numberOfNotes4, noteNumberQueue);
NoteHelper.CreateSamplesFromRhythmsAndNoteNames(new TimeSpan(), quarterNoteDuration, halfNoteDuration, dottedHalfNoteDuration, wholeNoteDuration, measureRhythmSplit1, notes1, measureNoteNumbers1);
NoteHelper.CreateSamplesFromRhythmsAndNoteNames(new TimeSpan(), quarterNoteDuration, halfNoteDuration, dottedHalfNoteDuration, wholeNoteDuration, measureRhythmSplit2, notes2, measureNoteNumbers2);
NoteHelper.CreateSamplesFromRhythmsAndNoteNames(new TimeSpan(), quarterNoteDuration, halfNoteDuration, dottedHalfNoteDuration, wholeNoteDuration, measureRhythmSplit3, notes3, measureNoteNumbers3);
NoteHelper.CreateSamplesFromRhythmsAndNoteNames(new TimeSpan(), quarterNoteDuration, halfNoteDuration, dottedHalfNoteDuration, wholeNoteDuration, measureRhythmSplit4, notes4, measureNoteNumbers4);
ISampleProvider phrase =
wholeDoNote;
foreach (var tick in ticks)
{
phrase = phrase.FollowedBy(tick);
}
foreach (var note1 in notes1)
{
phrase = phrase.FollowedBy(note1);
}
foreach (var note2 in notes2)
{
phrase = phrase.FollowedBy(note2);
}
if (numberOfMeasures == 4)
{
foreach (var note3 in notes3)
{
phrase = phrase.FollowedBy(note3);
}
foreach (var note4 in notes4)
{
phrase = phrase.FollowedBy(note4);
}
}
// HACK: Use an empty note because without it, the audio gets cut short.
ISampleProvider emptyNote = NAudioHelper.GetSampleProvider(0, 0, SignalGeneratorType.White, halfNoteDuration);
phrase = phrase.FollowedBy(emptyNote);
SampleToWaveProvider stwp = new SampleToWaveProvider(phrase);
MixingSampleProvider msp = new MixingSampleProvider(stwp.WaveFormat);
msp.AddMixerInput(stwp);
int totalTicks = 8 + (4 * numberOfMeasures);
ISampleProvider[] metronomeTicks = new ISampleProvider[totalTicks];
// The first two measures have zero gain, as this is the initial DO whole note and metronome ticks.
for (int i = 0; i < 8; i++)
{
metronomeTicks[i] = NAudioHelper.GetSampleProvider(0, 0, SignalGeneratorType.White, quarterNoteDuration);
}
for (int i = 8; i < totalTicks; i++)
{
metronomeTicks[i] = NAudioHelper.GetSampleProviderFromFile(tickFile, quarterNoteDuration);
}
ISampleProvider metronomePhrase = metronomeTicks[0];
for (int i = 0; i < metronomeTicks.Length; i++)
{
metronomePhrase = metronomePhrase.FollowedBy(metronomeTicks[i]);
}
msp.AddMixerInput(metronomePhrase);
IWaveProvider wp = msp.ToWaveProvider();
MemoryStream wavStream = new MemoryStream();
//WaveFileWriter.WriteWavFileToStream(wavStream, stwp);
WaveFileWriter.WriteWavFileToStream(wavStream, wp);
wavStream.Position = 0;
wavStream.WavToMp3File(out string fileName);
dict.Add("src", fileName);
#endregion Audio
#region Notation
string[] noteNames1 = new string[numberOfNotes1];
NoteHelper.AdjustNoteNamesForKey(keySignature, measureNoteNumbers1, noteNames1);
string[] noteNames2 = new string[numberOfNotes2];
NoteHelper.AdjustNoteNamesForKey(keySignature, measureNoteNumbers2, noteNames2);
string[] noteNames3 = new string[numberOfNotes3];
NoteHelper.AdjustNoteNamesForKey(keySignature, measureNoteNumbers3, noteNames3);
string[] noteNames4 = new string[numberOfNotes4];
NoteHelper.AdjustNoteNamesForKey(keySignature, measureNoteNumbers4, noteNames4);
string script1 = NoteHelper.GetEasyScoreScript("transcription1", noteNames1, measureRhythmSplit1, keySignature, true);
dict.Add("theScript1", script1);
string script2 = NoteHelper.GetEasyScoreScript("transcription2", noteNames2, measureRhythmSplit2, keySignature, false);
dict.Add("theScript2", script2);
if (numberOfMeasures == 4)
{
string script3 = NoteHelper.GetEasyScoreScript("transcription3", noteNames3, measureRhythmSplit3, keySignature, false);
dict.Add("theScript3", script3);
string script4 = NoteHelper.GetEasyScoreScript("transcription4", noteNames4, measureRhythmSplit4, keySignature, false);
dict.Add("theScript4", script4);
}
#endregion Notation
var json = Json(dict, JsonRequestBehavior.AllowGet);
return(json);
}
