func main() {
devices, err := midi.GetDevices()
check(err)
launchpad := controller.NewLaunchpad(devices["Launchpad"], map[int]int{})
launchpad.ButtonPressColor = controller.RedLow
launchpad.MomentaryButtons = false
launchpad.Open()
go launchpad.Run()
sampler, err := audio.NewLoadedSampler("config/launchpad_sequencer.json")
sampler.Run()
time.Sleep(1 * time.Second)
activeButtons := make(map[int]bool)
for i := 0; i < 8; i++ {
for j := i * 16; j < (i*16 + 8); j++ {
activeButtons[j] = false
}
}
go func() {
for {
select {
case note := <-launchpad.OutPort().NoteOns():
activeButtons[note.Key] = !activeButtons[note.Key] // toggle state
launchpad.ToggleLightColor(note.Key, controller.RedLow, controller.Black)
case <-launchpad.OutPort().NoteOffs():
continue
case <-launchpad.OutPort().ControlChanges():
continue
}
}
}()
for {
for i := 0; i < 8; i++ {
startButton := i
endButton := startButton + (8 * 16)
for j := startButton; j < endButton; j += 16 {
if activeButtons[j] {
launchpad.LightOn(j, controller.Red) // On color
column, _ := launchpad.XY(j)
sampler.Play(column, 0.7)
} else {
launchpad.LightOn(j, controller.Green) // Off color
}
}
time.Sleep(250 * time.Millisecond)
for j := startButton; j < endButton; j += 16 {
if activeButtons[j] {
launchpad.LightOn(j, controller.RedLow)
} else {
launchpad.LightOff(j)
}
}
}
}
}
func main() {
devices, _ := midi.GetDevices()
launchpad := controller.NewLaunchpad(devices["Launchpad"], make(map[int]int))
launchpad.Open()
go launchpad.Run()
fmt.Println("Here.")
time.Sleep(1 * time.Second)
launchpad.AllGridLightsOn(controller.Green)
wait := make(chan bool, 1)
<-wait
}
func main() {
devices, _ := midi.GetDevices()
launchpad := controller.NewLaunchpad(devices["Launchpad"], make(map[int]int))
launchpad.Open()
go launchpad.Run()
nextBoards := make(chan Board, 1)
nextBoards <- glider()
quit := make(chan bool, 1)
go handleButtons(&launchpad, nextBoards, quit)
go loop(&launchpad, nextBoards, quit)
wait := make(chan bool)
<-wait // wait forever
}
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
}
}
}
}