func main() {
home := os.Getenv("HOME")
filePath := home + "/Downloads/0_16.wav"
clip, err := audio.NewClipFromWave(filePath)
check(err)
s, err := audio.NewSampler(2)
check(err)
s.AddClip(clip, 64)
s.Run()
log.Println("Playing audio file " + filePath)
s.Play(64, volume)
<-time.After(clip.LenMilliseconds())
log.Println("Done playing audio file.")
}
func main() {
// Split out a sample, set up the sampler.
beat, err := audio.NewClipFromWave("samples/loops/beat.wav")
check(err)
numDivisions := 8
sleepLen := (beat.LenMilliseconds() / int64(numDivisions))
sampler, err := audio.NewSampler(2)
check(err)
clips, err := beat.Split(numDivisions)
check(err)
for i, clip := range clips {
sampler.AddClip(clip, i)
}
sampler.Run()
// Set up the launchpad.
devices, err := midi.GetDevices()
check(err)
launchpad := controller.NewLaunchpad(devices["Launchpad"], map[int]int{})
launchpad.ButtonPressColor = controller.Red
launchpad.Open()
go launchpad.Run()
// Throw out MIDI data that is not needed.
go func() {
for {
select {
case note := <-launchpad.OutPort().NoteOffs():
launchpad.LightOff(note.Key)
case <-launchpad.OutPort().ControlChanges():
continue
}
}
}()
i := 0
var volume float32 = 0.5
play := make(chan bool, 1)
pause := make(chan bool, 1)
paused := true
for {
select {
case note := <-launchpad.OutPort().NoteOns():
if note.Key == 8 {
pause <- true
}
if note.Key > numDivisions {
continue
}
last := i - 1
if last < 0 {
last = numDivisions - 1
}
launchpad.LightOff(last)
i = note.Key
case <-play:
last := i - 1
if last < 0 {
last = numDivisions - 1
}
launchpad.LightOff(last)
go sampler.Play(i, volume)
launchpad.LightOn(i, controller.Green)
go sleep(sleepLen, play)
i++
if i >= numDivisions {
i = 0
}
case <-pause:
timeout := make(chan bool, 1)
go sleep(sleepLen, timeout)
select {
case <-play:
case <-timeout:
}
if paused {
play <- true
paused = false
} else {
paused = true
}
}
}
}