/// <summary>
/// Passed a note/chord for lead, and note for melody. This chooses a sampler
/// on which to play the note, sets the pitch accordingly, and then plays the single note
/// or in the case of a lead chord, it plays all notes of the chord
///
/// scale is the 12th root of 2, or 1 semitone step, the basis assumes its at C (first note) of
/// the scale. It is precomputed, and reset each time a note tries to play to prevent weird offsets
///
/// FUTURE WORK: Precompute all scale^notevals and use that instead of Math.Pow()
/// </summary>
public void Play(IMusicalValue leadValue, IMusicalValue melodyValue)
{
float scale = 1.059463f;// Mathf.Pow(2f, 1.0f / 12f);
// Play the sound on the next voice (And pass envelope modifications)
//Base chords and individual notes for lead
if (leadValue is Chord)
{
Chord leadChord = leadValue as Chord;
//Debug.Log("Chord Cast");
foreach (Tone note in leadChord.Notes)
{
_samplerVoices[_nextVoiceIndex].Pitch = Mathf.Pow(scale, (float)note - 1);
_samplerVoices[_nextVoiceIndex].Play(LeadInstrument, _attackLead, _sustainLead, _releaseLead);
++_nextVoiceIndex;
_nextVoiceIndex = (_nextVoiceIndex + 1) % _samplerVoices.Length;
}
}
else if (leadValue is Note)
{
//Playing a single note
Note leadNote = leadValue as Note;
_samplerVoices[_nextVoiceIndex].Pitch = Mathf.Pow(scale, (float)leadNote.Value - 1);
if (leadNote.Value == Tone.Rest)
{
_samplerVoices[_nextVoiceIndex].Play(RestSpacer, _attackLead, _sustainLead, _releaseLead);
}
else
{
//Debug.Log("Note Cast and played");
_samplerVoices[_nextVoiceIndex].Play(LeadInstrument, _attackLead, _sustainLead, _releaseLead);
}
++_nextVoiceIndex;
_nextVoiceIndex = (_nextVoiceIndex + 1) % _samplerVoices.Length;
}
if (melodyValue is Note)
{
//Playing a single note
Note melodyNote = melodyValue as Note;
_samplerVoices[_nextVoiceIndex].Pitch = Mathf.Pow(scale, (float)melodyNote.Value - 1);
//Debug.Log("playing melody note" + melodyNote.Value);
if (melodyNote.Value == Tone.Rest)
{
_samplerVoices[_nextVoiceIndex].Play(RestSpacer, _attackMelody, _sustainMelody, _releaseMelody);
}
else
{
_samplerVoices[_nextVoiceIndex].Play(MelodyInstrument, _attackMelody, _sustainMelody, _releaseMelody);
}
++_nextVoiceIndex;
_nextVoiceIndex = (_nextVoiceIndex + 1) % _samplerVoices.Length;
}
//wrap nextvoice around if it exceeds max
}
/// <summary>
/// Generates a Melody using the notes in this bar (lead) and a melody pattern
/// </summary>
private List <IMusicalValue> GetMelodyBar(List <IMusicalValue> bar, List <int?> pattern)
{
IMusicalValue barChord = bar[(int)Beat.One];
Note rootBarNote = CurrentMood.TonicNote;
if (barChord is Chord)
{
rootBarNote = Theory.GetNote(((Chord)barChord).Notes[0]);
}
else if (barChord is Note)
{
rootBarNote = (Note)barChord;
if (rootBarNote.Value == Tone.Rest)
{
rootBarNote = CurrentMood.TonicNote;
}
}
else
{
Debug.Log("Cannot determine the root note or chord for this bar. Shouldnt happen.");
}
List <IMusicalValue> newMelodyBar = new List <IMusicalValue>();
for (int n = 0; n < pattern.Count; n++)
{
if (pattern[n] != null)
{
newMelodyBar.Add(Theory.GetNextNoteByInterval(rootBarNote, (int)pattern[n]));
}
else
{
newMelodyBar.Add(Theory.Rest);
}
}
return(newMelodyBar);
}
/// <summary>
/// Step each track forward one position and pass the notevalues to the sampler
/// at that position
/// </summary>
public void Step()
{
IMusicalValue leadValue = LeadTrack.Dequeue();
IMusicalValue melodyValue = MelodyTrack.Dequeue();
Sampler.Play(leadValue, melodyValue);
if (LeadTrack.Count < 2)
{
//Changing mood at some point within this
MusicGenerator MusicGen = MusicGenerator.GetInstance();
Metronome metro = FindObjectOfType <Metronome>();
MusicGen.GetMood();
if (MusicGen.CurrentMood != currentMood)
{
Debug.Log("CHANGING MOOD");
MusicGen.Generate();
currentMood = MusicGen.CurrentMood;
var emptyBar = MusicGen.GetBar();
foreach (IMusicalValue note in emptyBar)
{
LeadTrack.Enqueue(note);
MelodyTrack.Enqueue(note);
}
metro.bpm = currentMood.Tempo;
Sampler.LeadInstrument = currentMood.LeadInstrumentSample;
Sampler.MelodyInstrument = currentMood.MelodyInstrumentSample;
Sampler.SetASR(currentMood.ASRSettings);
}
//else
//{
// //slow down as we fade out
// metro.bpm /= 2;
//}
GetNextTracks();
}
}
