func main() {
dev := flag.String("d", "/dev/input/by-id/usb-0810_Twin_USB_Joystick-event-joystick", "The GH controller event device")
flag.Int64Var(&baseNote, "b", 48, "The base midi note with no button pressed")
flag.Int64Var(&vel, "v", 100, "Midi note velocity")
flag.Int64Var(&midiChan, "c", 1, "Midi channel")
flag.Parse()
portmidi.Initialize()
out, err := portmidi.NewOutputStream(portmidi.GetDefaultOutputDeviceId(), 32, 0)
if err != nil {
fmt.Println(err)
return
}
c := make(chan *evdev.InputEvent)
e := make(chan error)
go ReadGuitar(c, e, *dev)
for {
select {
case but := <-c:
switch but.Code {
case butGreen, butRed, butYellow, butBlue, butOrange:
SetNote(butMap[but.Code], but.Value)
if playing != -1 {
SwapNote(out, baseNote+butState+octave, vel)
}
case butStrumbar:
if but.Value == 255 || but.Value == 0 {
NoteOn(out, baseNote+butState+octave, vel)
} else if !hold {
NoteOff(out, playing, vel)
}
case butSelect:
if but.Value != 0 {
hold = !hold
if !hold {
NoteOff(out, playing, vel)
}
}
case butTilt:
if but.Value == 1 {
octave += 12
} else {
octave -= 12
}
if playing != -1 {
SwapNote(out, baseNote+butState+octave, vel)
}
case butStart:
AllNotesOff(out)
}
case err := <-e:
fmt.Println(err)
close(c)
close(e)
return
default:
}
}
}
func main() {
flag.Parse()
portaudio.Initialize()
defer portaudio.Terminate()
portmidi.Initialize()
defer portmidi.Terminate()
if *doDemo {
if err := demo(); err != nil {
log.Println(err)
}
return
}
http.Handle("/", http.FileServer(http.Dir("static")))
http.HandleFunc("/socket", socket.Handler)
l, err := net.Listen("tcp", *listenAddr)
if err != nil {
log.Fatal(err)
}
go http.Serve(l, nil)
u := fmt.Sprintf("http://%v/", *listenAddr)
if !*doBrowser || !openBrowser(u) {
fmt.Printf("Open your web browser to %v\n\n", u)
}
fmt.Println("Press enter to quit...")
os.Stdin.Read([]byte{0})
}
func main() {
flag.Parse()
portaudio.Initialize()
defer portaudio.Terminate()
portmidi.Initialize()
defer portmidi.Terminate()
if *doDemo {
if err := demo(); err != nil {
log.Println(err)
}
return
}
http.Handle("/", http.FileServer(http.Dir("static")))
http.HandleFunc("/socket", socketHandler)
go func() {
if err := http.ListenAndServe(*listenAddr, nil); err != nil {
log.Println(err)
}
}()
os.Stdout.Write([]byte("Press enter to stop...\n"))
os.Stdin.Read([]byte{0})
}
func newDevices() (devs devices) {
portmidi.Initialize()
devs = devices{
info: map[portmidi.DeviceId]*portmidi.DeviceInfo{},
}
for id := 0; id < portmidi.CountDevices(); id++ {
devID := deviceID(id)
devs.info[devID] = portmidi.GetDeviceInfo(devID)
}
return
}
func main() {
flag.Parse()
rand.Seed(time.Now().Unix())
if err := portmidi.Initialize(); err != nil {
log.Fatal(err)
}
defer portmidi.Terminate()
if *deviceN == -1 {
listDevices()
return
}
if err := run(); err != nil {
portmidi.Terminate()
log.Fatal(err)
}
}
func midiOpen(argv []*ell.Object) (*ell.Object, error) {
// defaultInput := "USB Oxygen 8 v2"
// defaultOutput := "IAC Driver Bus 1"
latency := int64(10)
if !midiOpened {
err := portmidi.Initialize()
if err != nil {
return nil, err
}
midiOpened = true
midiInDevice = ell.StringValue(argv[0])
midiOutDevice = ell.StringValue(argv[1])
midiBufsize = ell.Int64Value(argv[2])
outdev, outname := findMidiOutputDevice(midiOutDevice)
out, err := portmidi.NewOutputStream(outdev, midiBufsize, latency)
if err != nil {
return nil, err
}
midiOut = out
midiOutDevice = outname
if midiInDevice != "" {
indev := findMidiInputDevice(midiInDevice)
if indev >= 0 {
in, err := portmidi.NewInputStream(indev, midiBufsize)
if err != nil {
return nil, err
}
midiIn = in
}
}
midiBaseTime = ell.Now()
}
result := ell.MakeStruct(4)
if midiInDevice != "" {
ell.Put(result, inputKey, ell.String(midiInDevice))
}
if midiOutDevice != "" {
ell.Put(result, outputKey, ell.String(midiOutDevice))
}
ell.Put(result, bufsizeKey, ell.Number(float64(midiBufsize)))
return result, nil
}
// renderMidi reads a midi device, converts it to a live sound, and renders the waveform to screen.
func renderMidi() {
fmt.Println("Loading portmidi...")
pm.Initialize()
midi := s.NewMidiInput(pm.DeviceId(3)) // ++See below
fmt.Printf("Rendering midi...\n")
// Render the generated sine wave to screen:
output.Render(midi, 2000, 500)
// ...or, play it live:
// output.Play(midi)
/*
++ Note: to find your device id, use a version of this:
for i := 1; i <= pm.CountDevices(); i++ {
fmt.Printf("Reading device: %d\n", i)
di := pm.GetDeviceInfo(pm.DeviceId(i))
fmt.Printf("Info = %v\n", di)
}
*/
}
func main() {
flag.Usage = func() {
fmt.Fprint(os.Stderr, usage)
flag.PrintDefaults()
os.Exit(2)
}
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
}
p, err := drum.DecodeFile(flag.Arg(0))
if err != nil {
log.Fatalf("cannot decode splice file: %v", err)
}
if *showInfo {
fmt.Print(p)
return
}
patches, err := readPatches(p, *sampleDir)
if err != nil {
log.Fatalf("cannot read sample patches: %v", err)
}
drumMod, err := drummachine.New(p, patches)
if err != nil {
log.Fatalf("cannot make new drum machine: %v", err)
}
portaudio.Initialize()
defer portaudio.Terminate()
portmidi.Initialize()
defer portmidi.Terminate()
e := audio.NewEngine()
e.Input("in", drumMod)
if err := e.Start(); err != nil {
panic(err)
}
select {}
}
func initPortMidi() *portmidi.Stream {
portmidi.Initialize()
deviceCount := portmidi.CountDevices()
fmt.Println("Number of MIDI devices: ", deviceCount)
dev := portmidi.DeviceId(3 - 1)
for i := 0; i < deviceCount; i++ {
id := portmidi.DeviceId(i)
fmt.Println("Index ", i, "Id", id, " Device ", *portmidi.GetDeviceInfo(id))
}
out, err := portmidi.NewOutputStream(dev, 0, 0)
if err == nil {
fmt.Println("used device info: ", *portmidi.GetDeviceInfo(dev))
} else {
fmt.Println("Error: ", err)
os.Exit(2)
}
return out
}
func main() {
var (
ccValue int64
ccNumber int64
deviceId portmidi.DeviceId
err error
)
ccNumber, ccValue, err = parseArgs(os.Args)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
portmidi.Initialize()
defer portmidi.Terminate()
deviceId, err = getDeviceId()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
out, err := portmidi.NewOutputStream(deviceId, 1024, 0)
if err != nil {
fmt.Println("Error opening MicroBrute output port:", err)
os.Exit(1)
}
err = out.WriteShort(ccMessage, ccNumber, ccValue)
if err != nil {
fmt.Println("Error sending message to MicroBrute:", err)
os.Exit(1)
}
}
func main() {
var synthID int32
const synthName = "sineTone"
// Set up SuperCollider client.
client, err := sc.NewClient("udp", "127.0.0.1:57121", "127.0.0.1:57120", 5*time.Second)
if err != nil {
log.Fatal(err)
}
_, err = client.AddDefaultGroup()
if err != nil {
log.Fatal(err)
}
err = client.DumpOSC(int32(1))
if err != nil {
log.Fatal(err)
}
def := sc.NewSynthdef(synthName, func(p sc.Params) sc.Ugen {
freq := p.Add("freq", 440)
gain := p.Add("gain", 0.5)
bus := sc.C(0)
env := sc.EnvGen{
Env: sc.EnvPerc{},
Done: sc.FreeEnclosing,
LevelScale: gain,
}.Rate(sc.KR)
sig := sc.SinOsc{Freq: freq}.Rate(sc.AR).Mul(env)
return sc.Out{bus, sig}.Rate(sc.AR)
})
err = client.SendDef(def)
if err != nil {
log.Fatal(err)
}
// initialize midi
portmidi.Initialize()
// this code can be uncommented to discover the
// device ID's portmidi comes up with
// deviceCount := portmidi.CountDevices()
// enc := json.NewEncoder(os.Stdout)
// for i := 0; i < deviceCount; i++ {
// info := portmidi.GetDeviceInfo(portmidi.DeviceId(i))
// log.Printf("device %d - ", i)
// err = enc.Encode(info)
// if err != nil {
// log.Fatal(err)
// }
// }
// setup midi input stream and listen for midi events
in, err := portmidi.NewInputStream(3, 1024)
if err != nil {
log.Fatal(err)
}
ch := in.Listen()
for event := range ch {
if event.Status == 144 {
// MIDI note
log.Printf("Note %-3d Velocity %-3d\n", event.Data1, event.Data2)
if event.Data2 > 0 {
// Note On
synthID = client.NextSynthID()
ctls := map[string]float32{
"freq": sc.Midicps(float32(event.Data1)),
"gain": float32(event.Data2 / 127.0),
}
_, err = client.Synth(synthName, synthID, sc.AddToTail, sc.DefaultGroupID, ctls)
}
}
}
portmidi.Terminate()
}
func main() {
flag.Parse()
var err error
if err = portmidi.Initialize(); err != nil {
log.Fatal("error while initializing portmidi", err)
}
if out, err = portmidi.NewOutputStream(portmidi.DeviceID(*flagOutput), 1024, 0); err != nil {
log.Fatal("error while initializing connection to midi out stream")
}
if pad, err = launchpad.Open(); err != nil {
log.Fatal("error while initializing connection to launchpad", err)
}
grid = newGrid()
instruments = []int{
70, // maracas
38, // snare 1
40, // snare 2
51, // ride cymbal
42, // closed hi-hat
58, // vibra slap
46, // open hi-hat
81} // open triangle
// load an initial drum pattern
// hi-hats
grid[0][4] = true
grid[2][4] = true
grid[4][4] = true
grid[6][4] = true
// snares
grid[5][3] = true
grid[5][2] = true
grid[5][1] = true
// bells
grid[6][7] = true
grid[7][7] = true
grid[5][6] = true
// clear
pad.Reset()
// listen button toggles
ch := pad.Listen()
go func() {
for {
hit := <-ch
log.Println("drum toggled at", hit)
if hit.Y == -1 || hit.X > 7 {
// a controller button is hit
continue
}
grid[hit.X][hit.Y] = !grid[hit.X][hit.Y]
if !grid[hit.X][hit.Y] {
// turn off immediately
pad.Light(hit.X, hit.Y, 0, 0)
}
}
}()
for {
for x := 0; x < NumberofHGrids; x++ {
tick(x)
}
}
}
