synth roulette

gistfile1.txt

package main

import (
	"fmt"
	"log"
	"time"

	"github.com/rakyll/portmidi"
)

func main() {
	portmidi.Initialize()
	defer portmidi.Terminate()

	fmt.Println(portmidi.CountDevices())
	out, err := portmidi.NewOutputStream(portmidi.DefaultOutputDeviceID(), 1024, 0)
	if err != nil {
		log.Fatal(err)
	}

	// note on events to play C major chord
	out.WriteShort(0x90, 60, 100)
	out.WriteShort(0x90, 64, 100)
	out.WriteShort(0x90, 67, 100)

	// notes will be sustained for 2 seconds
	time.Sleep(2 * time.Second)

	// note off events
	out.WriteShort(0x80, 60, 100)
	out.WriteShort(0x80, 64, 100)
	out.WriteShort(0x80, 67, 100)

	out.Close()
}