diff --git a/backend/midiDevice.go b/backend/midiDevice.go
deleted file mode 100644
index cfbd7da..0000000
--- a/backend/midiDevice.go
+++ /dev/null
@@ -1,50 +0,0 @@
-package backend
-
-import (
-	"github.com/tonychee7000/Arremi/consts"
-	midi "github.com/youpy/go-coremidi"
-)
-
-// MIDIDevice implies a Writer interface.
-type MIDIDevice struct {
-	client midi.Client
-	source midi.Source
-	Signal chan midi.Packet
-}
-
-// NewMIDIDevice construction func
-func NewMIDIDevice() (*MIDIDevice, error) {
-	var mididev = new(MIDIDevice)
-	err := mididev.Init()
-	return mididev, err
-}
-
-// Init the client and source
-func (midiDev *MIDIDevice) Init() error {
-	var err error
-
-	midiDev.Signal = make(chan midi.Packet, 4096)
-	midiDev.client, err = midi.NewClient(consts.ClientName)
-	if err != nil {
-		return err
-	}
-
-	midiDev.source, err = midi.NewSource(midiDev.client, consts.SourceName)
-	return err
-}
-
-func (midiDev *MIDIDevice) Write(p []byte) (int, error) {
-	var pack = midi.NewPacket(p, 0)
-	midiDev.Signal <- pack
-	err := pack.Received(&(midiDev.source))
-	return len(p), err
-}
-
-// AllNoteOff I don't want panic!
-func (midiDev *MIDIDevice) AllNoteOff() {
-	for i := 0; i < 16; i++ {
-		for j := 0; j < 128; j++ {
-			midiDev.Write([]byte{byte(0x90 + i), byte(j), 0})
-		}
-	}
-}