func (s *song) Sing() float64 {
s.n--
if s.n < 0 {
s.n = int(s.Params.SampleRate / 20)
for i, t := range s.tones {
if t.Smoother.Value() < -16 {
s.removeTone(i)
break
}
}
for len(s.tones) < 6 {
s.addTone()
print(".")
}
for _, t := range s.tones {
t.dAmp = math.Max(-8, math.Min(8, t.dAmp+4*(rand.NormFloat64()+1/t.amp)/20))
// t.dAmp *= .98
t.amp = math.Min(0, t.amp+t.dAmp/20)
}
// c := s.complexity()
// for _, t := range s.tones {
// t.amp += math.Log2(1 / c)
// }
}
x := 0.0
for _, t := range s.tones {
x += t.sing()
}
return audio.Saturate(x)
}
func main() {
flag.Parse()
if *random {
*seed = time.Now().UnixNano()
fmt.Println("seed =", *seed)
}
if *seed != math.MinInt64 {
*random = true
}
rand.Seed(*seed)
portaudio.Initialize()
defer portaudio.Terminate()
p := audio.Params{SampleRate: 48000}
m := audio.MultiVoice{}
audio.Init(&m, p)
// for _, x := range [][2]float64{{1, 1}, {2, 1}, {3, 1}, {4, 1}, {5, 1}, {3, 2}, {4, 3}, {5, 4}, {7, 4}, {6, 5}, {7, 5}, {8, 5}, {9, 5}} {
for xy := 1; xy <= 60; xy++ {
for x := 2; x <= int(math.Sqrt(float64(xy))); x++ {
if y := xy / x; x*y == xy && relPrime(x, y) {
x, y, xy := float64(x), float64(y), float64(xy)
c := math.Exp(-xy * math.Log2(y/x) / 12)
f := y / x
phase := 0.0
if *random {
phase = rand.Float64()
}
m.Add(newSineBeat(.5*c, 128*f, 1/xy, phase, .1/f))
}
}
}
s, err := portaudio.OpenDefaultStream(0, 1, p.SampleRate, 512, func(out []float32) {
for i := range out {
out[i] = float32(audio.Saturate(m.Sing()))
}
})
if err != nil {
panic(err)
}
s.Start()
fmt.Println("Press Enter to stop.")
fmt.Scanln()
s.Stop()
}
func (s *song) Sing() float64 {
s.EventDelay.Step()
return audio.Saturate(s.MultiVoice.Sing() / 4)
}
func (t *tone) sing() float64 {
return t.attenuate * math.Exp2(t.Smoother.Smooth(t.amp)) * audio.Saturate(2*t.Osc.Sing())
}
func (v *sineVoice) Sing() float64 {
return audio.Saturate(2*v.Osc.Sing()) * v.Env.Sing() * v.amp
}
func (s *song) Sing() float64 {
s.EventDelay.Step()
x := audio.Saturate(s.MultiVoice.Sing())
return audio.Saturate((2*x + s.Reverb.Filter(x)) / 3)
}
func (s *sines) Sing() float64 {
return math.Exp2(s.Amplitude.Sing()) * audio.Saturate(s.MultiVoice.Sing()*math.Exp2(s.Distortion.Sing()))
}
func (v *sineVoice) Sing() float64 {
v.Sine.Freq(math.Exp2(v.Pitch.Sing()))
g := math.Exp2(v.Amp.Sing()) * v.Env.Sing()
return g * audio.Saturate(2*v.Sine.Sing())
}