func SampleMultiply() s.Sound {
// Includes: TimedSound and SineWave
all := make([]s.Sound, 20)
for i := 0; i < len(all); i++ {
all[i] = s.MultiplyWithClip(s.NewTimedSound(s.NewSineWave(659.25), 200), 0.2+float64(i)/10.0)
}
return s.ConcatSounds(all...)
}
func SampleDenseIIR() s.Sound {
// Includes: TimedSound and SineWave
all := make([]s.Sound, 10)
for i := 0; i < len(all); i++ {
all[i] = s.NewTimedSound(s.NewSineWave(600*float64(i)/4), 200)
}
return s.NewDenseIIR(s.ConcatSounds(all...),
[]float64{0.8922, -2.677, 2.677, -0.8922},
[]float64{2.772, -2.57, 0.7961},
)
}
func main() {
runtime.GOMAXPROCS(2)
fmt.Printf("Open the serial cable...\n")
port, err := serial.OpenPort(&serial.Config{Name: findArduino(), Baud: 9600})
if err != nil {
log.Fatal(err)
}
time.Sleep(1 * time.Second)
fmt.Printf("Generate the tone definition...\n")
player := &Player{}
toPlay := s.SumSounds(
s.NewHzFromChannel(player.sampledToneGenerator()),
s.NewSineWave(hzC/2.0),
)
buf := make([]byte, 128)
startTime, readCount := time.Now(), 0
for {
if _, err := port.Read(buf); err != nil {
if readCount == 0 {
startTime = time.Now()
player.Start(toPlay)
}
readCount++
player.currentValue = float64(buf[0]) / 256.0
if readCount%100000 == 0 {
fmt.Printf("Value = %f\n", player.currentValue)
}
if readCount%1000000 == 0 {
seconds := time.Since(startTime).Seconds()
fmt.Printf("Read %d in %f seconds, at a rate of %f Hz\n",
readCount, seconds, float64(readCount)/seconds)
}
}
}
}
// noteToHz reads a note starting at an offset, and returns its Sound and the end offset.
func noteToSound(note string, offset int, base uint) (s.Sound, int) {
baseHz, next := noteToHz(note, offset, base)
return s.NewSineWave(baseHz), next
}
// MidiToSound converts a midi note into a sound that plays its pitch.
func MidiToSound(midiNote int) s.Sound {
// NOTE: You can substitute here something that reads from .wav files
// to synthesize the notes instead.
return s.NewSineWave(midiToHz(midiNote))
}
func SampleSampler() s.Sound {
// Includes: TimedSound and SineWave
return s.LinearSample(s.NewTimedSound(s.NewSineWave(392.00), 500), 2.0)
}
func SampleAdsrEnvelope() s.Sound {
// Includes: TimedSound and SineWave
return s.NewADSREnvelope(
s.NewTimedSound(s.NewSineWave(880.0), 875),
50, 200, 0.5, 100)
}
func SampleTimedSineSound() s.Sound {
// Includes: SineWave
return s.NewTimedSound(s.NewSineWave(261.63), 1000)
}