void EigthNotes(ChordProgression p, Random r)
{
foreach (var c in p.chords)
{
var numBeats = c.Duration / p.BeatDuration;
var maxEigths = numBeats * 2;
var numEigthsComposed = 0;
while (numEigthsComposed < maxEigths)
{
var e = 1;
if (numEigthsComposed + e > maxEigths)
{
e = maxEigths - numEigthsComposed;
}
numEigthsComposed += e;
var n = c.Tonic;
while (n > 50)
{
n -= 12;
}
chords.Add(new PlayableNote(
n,
e * p.BeatDuration / 2,
c.Velocity));
}
// Console.WriteLine (numBeats);
}
}
public Melody(ChordProgression p, Random r, int octave)
{
int prevNote = -1;
OctaveShift = octave;
foreach (var c in p.chords)
{
var numBeats = c.Duration / p.BeatDuration;
var maxEigths = numBeats * 2;
var numEigthsComposed = 0;
while (numEigthsComposed < maxEigths)
{
var e = 1 + r.Next((3 * maxEigths) / 4);
if (numEigthsComposed + e > maxEigths)
{
e = maxEigths - numEigthsComposed;
}
numEigthsComposed += e;
var n = PickNote(c.Chord.GetNotes(c.Tonic), r, prevNote)
+ octave * 12;
chords.Add(new PlayableNote(
n,
e * p.BeatDuration / 2,
c.Velocity));
}
// Console.WriteLine (numBeats);
}
}
public Section(Random r, ArrangementInstruments ins, ChordProgression prog, int melodyOctave)
{
this.ins = ins;
Progression = prog;
Melody = new Melody(Progression, r, melodyOctave);
Bassline = new Bassline(Progression, r);
Percussion = new PercussionLine(Progression, r);
}
void SonClave(ChordProgression p, Random r)
{
var beatNumber = 0;
foreach (var c in p.chords)
{
var chordBeats = c.Duration / p.BeatDuration;
var dur = 4 * p.BeatDuration;
Console.WriteLine("Bass dur = {0}", dur);
var vel = c.Velocity + 10;
var n = c.Tonic;
while (n > 50)
{
n -= 12;
}
while (chordBeats > 0)
{
switch (beatNumber)
{
case 0:
chords.Add(new PlayableNote(n, (dur * 3) / 16, vel));
chords.Add(new PlayableNote(n, (dur * 1) / 16, vel));
break;
case 1:
case 2:
chords.Add(new PlayableRest(dur / 8));
chords.Add(new PlayableNote(n, dur / 8, vel));
break;
case 3:
chords.Add(new PlayableNote(n, dur / 4, vel));
break;
}
chordBeats--;
beatNumber = (beatNumber + 1) % 4;
}
}
}
public Bassline(ChordProgression p, Random r)
{
// SonClave (p, r);
EigthNotes(p, r);
}
void Rock(ChordProgression p, Random r)
{
//
// Hi Hat
//
foreach (var c in p.chords)
{
var numBeats = c.Duration / p.BeatDuration;
var maxEigths = numBeats * 2;
var numEigthsComposed = 0;
var loud = true;
while (numEigthsComposed < maxEigths)
{
var e = 1;
if (numEigthsComposed + e > maxEigths)
{
e = maxEigths - numEigthsComposed;
}
numEigthsComposed += e;
hiHat.Add(new PlayableNote(
42,
e * p.BeatDuration / 2,
loud ? c.Velocity : c.Velocity / 2));
loud = !loud;
}
// Console.WriteLine (numBeats);
}
//
// Bass
//
var beatNumber = 0;
foreach (var c in p.chords)
{
var chordBeats = c.Duration / p.BeatDuration;
while (chordBeats > 0)
{
switch (beatNumber)
{
case 0:
case 2:
bass.Add(new PlayableNote(
36,
p.BeatDuration,
c.Velocity + 20));
snare.Add(new PlayableRest(p.BeatDuration));
break;
case 1:
case 3:
bass.Add(new PlayableRest(p.BeatDuration));
snare.Add(new PlayableNote(
37,
p.BeatDuration,
c.Velocity));
break;
}
chordBeats--;
beatNumber = (beatNumber + 1) % 4;
}
// Console.WriteLine (numBeats);
}
}
public PercussionLine(ChordProgression p, Random r)
{
Rock(p, r);
}