simple example

package main

import (

	"io"

	"os/exec"

	"time"

	"math"

)

import . "github.com/splace/joysticks"

import . "github.com/splace/sounds"

func main() {

	events := Capture(

		Channel{10, HID.OnLong},  // event[0] button #10 long pressed

		Channel{1, HID.OnClose},  // event[1] button #1 closes

		Channel{7, HID.OnOpen},  // event[2] button #7 opens

		Channel{8, HID.OnOpen},  // event[3] button #8 opens

		Channel{2, HID.OnRotate}, // event[4] hat #1 rotates

		Channel{1, HID.OnRotate}, // event[5] hat #2 rotates

	)

	var volume float32 = .5

	var octave =5

	var note int =1

	for {

		select {

		case <-events[0]:

			return

		case <-events[1]:

			play(NewSound(NewTone(Period(octave,note), float64(volume)), time.Second/3))

		case <-events[2]:

			octave++

		case <-events[3]:

			octave--

		case h := <-events[4]:

			volume = h.(HatAngleEvent).Angle/6.28 + .5

		case h := <-events[5]:

			//f = time.Duration(100*math.Pow(2, float64(h.(HatAngleEvent).Angle)/6.28)) * time.Second / 44000

			note = int(h.(HatAngleEvent).Angle*6 / math.Pi)

		}

	}

}

func play(s Sound) {

	cmd := exec.Command("aplay")

	out, in := io.Pipe()

	go func() {

		Encode(in, 2, 44100, s)

		in.Close()

	}()

	cmd.Stdin = out

	err := cmd.Run()

	if err != nil {

		panic(err)

	}

}