diff --git a/audio/internal/readerdriver/driver_js.go b/audio/internal/readerdriver/driver_js.go
index fe42c4c8d..bfeff4785 100644
--- a/audio/internal/readerdriver/driver_js.go
+++ b/audio/internal/readerdriver/driver_js.go
@@ -22,8 +22,6 @@ import (
 	"sync"
 	"syscall/js"
 	"unsafe"
-
-	"github.com/hajimehoshi/ebiten/v2/audio/internal/go2cpp"
 )
 
 type context struct {
@@ -38,10 +36,6 @@ type context struct {
 
 func newContext(sampleRate int, channelNum int, bitDepthInBytes int) (*context, chan struct{}, error) {
 	ready := make(chan struct{})
-	if js.Global().Get("go2cpp").Truthy() {
-		close(ready)
-		return &go2cppDriverWrapper{go2cpp.NewContext(sampleRate, channelNum, bitDepthInBytes)}, ready, nil
-	}
 
 	class := js.Global().Get("AudioContext")
 	if !class.Truthy() {
@@ -386,24 +380,6 @@ func (p *player) loop() {
 	}
 }
 
-type go2cppDriverWrapper struct {
-	c *go2cpp.Context
-}
-
-func (w *go2cppDriverWrapper) NewPlayer(r io.Reader) Player {
-	return w.c.NewPlayer(r)
-}
-
-func (w *go2cppDriverWrapper) Suspend() error {
-	// Do nothing so far.
-	return nil
-}
-
-func (w *go2cppDriverWrapper) Resume() error {
-	// Do nothing so far.
-	return nil
-}
-
 func toLR(data []byte) ([]float32, []float32) {
 	const max = 1 << 15
 
diff --git a/audio/player.go b/audio/player.go
index 585b8187d..1792be093 100644
--- a/audio/player.go
+++ b/audio/player.go
@@ -99,7 +99,7 @@ func (f *playerFactory) initContextIfNeeded() (<-chan struct{}, error) {
 		return nil, nil
 	}
 
-	c, ready, err := readerdriver.NewContext(f.sampleRate, channelNum, bitDepthInBytes)
+	c, ready, err := newContext(f.sampleRate, channelNum, bitDepthInBytes)
 	if err != nil {
 		return nil, err
 	}
diff --git a/audio/player_js.go b/audio/player_js.go
new file mode 100644
index 000000000..74aff9526
--- /dev/null
+++ b/audio/player_js.go
@@ -0,0 +1,52 @@
+// Copyright 2021 The Ebiten Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package audio
+
+import (
+	"io"
+	"syscall/js"
+
+	"github.com/hajimehoshi/ebiten/v2/audio/internal/go2cpp"
+	"github.com/hajimehoshi/ebiten/v2/audio/internal/readerdriver"
+)
+
+func newContext(sampleRate, channelNum, bitDepthInBytes int) (context, chan struct{}, error) {
+	if js.Global().Get("go2cpp").Truthy() {
+		ready := make(chan struct{})
+		close(ready)
+		ctx := go2cpp.NewContext(sampleRate, channelNum, bitDepthInBytes)
+		return &go2cppDriverWrapper{ctx}, ready, nil
+	}
+
+	return readerdriver.NewContext(sampleRate, channelNum, bitDepthInBytes)
+}
+
+type go2cppDriverWrapper struct {
+	c *go2cpp.Context
+}
+
+func (w *go2cppDriverWrapper) NewPlayer(r io.Reader) readerdriver.Player {
+	return w.c.NewPlayer(r)
+}
+
+func (w *go2cppDriverWrapper) Suspend() error {
+	// Do nothing so far.
+	return nil
+}
+
+func (w *go2cppDriverWrapper) Resume() error {
+	// Do nothing so far.
+	return nil
+}
diff --git a/audio/player_notjs.go b/audio/player_notjs.go
new file mode 100644
index 000000000..58dd0d839
--- /dev/null
+++ b/audio/player_notjs.go
@@ -0,0 +1,26 @@
+// Copyright 2021 The Ebiten Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build !js
+// +build !js
+
+package audio
+
+import (
+	"github.com/hajimehoshi/ebiten/v2/audio/internal/readerdriver"
+)
+
+func newContext(sampleRate, channelNum, bitDepthInBytes int) (context, chan struct{}, error) {
+	return readerdriver.NewContext(sampleRate, channelNum, bitDepthInBytes)
+}