diff --git a/android/app/src/main/java/io/github/kichikuou/xsystem35/GameActivity.kt b/android/app/src/main/java/io/github/kichikuou/xsystem35/GameActivity.kt
index da1efce..666e449 100644
--- a/android/app/src/main/java/io/github/kichikuou/xsystem35/GameActivity.kt
+++ b/android/app/src/main/java/io/github/kichikuou/xsystem35/GameActivity.kt
@@ -19,7 +19,6 @@ package io.github.kichikuou.xsystem35
 
 import android.media.MediaPlayer
 import android.os.Bundle
-import android.util.Base64
 import android.util.Log
 import org.libsdl.app.SDLActivity
 import java.io.File
@@ -75,7 +74,7 @@ class GameActivity : SDLActivity() {
     @Suppress("unused") fun cddaStart(track: Int, loop: Boolean) = cdda.start(track, loop)
     @Suppress("unused") fun cddaStop() = cdda.stop()
     @Suppress("unused") fun cddaCurrentPosition() = cdda.currentPosition()
-    @Suppress("unused") fun midiStart(buf: ByteArray, loop: Boolean) = midi.start(buf, loop)
+    @Suppress("unused") fun midiStart(path: String, loop: Boolean) = midi.start(path, loop)
     @Suppress("unused") fun midiStop() = midi.stop()
     @Suppress("unused") fun midiCurrentPosition() = midi.currentPosition()
 }
@@ -148,12 +147,11 @@ private class MidiPlayer {
     private var playing = false
     private var playerPaused = false
 
-    fun start(buf: ByteArray, loop: Boolean) {
-        val url = "data:audio/midi;base64," + Base64.encodeToString(buf, Base64.DEFAULT)
+    fun start(path: String, loop: Boolean) {
         try {
             player.apply {
                 reset()
-                setDataSource(url)
+                setDataSource(path)
                 isLooping = loop
                 prepare()
                 start()
diff --git a/src/midi.android.c b/src/midi.android.c
index 6892c17..95fa436 100644
--- a/src/midi.android.c
+++ b/src/midi.android.c
@@ -75,20 +75,28 @@ static int midi_start(int no, int loop, char *data, int datalen) {
 		return NG;
 	}
 
-	jbyteArray array = (*env)->NewByteArray(env, datalen);
-	if (!array) {
-		WARNING("Failed to allocate an array");
+	char path[PATH_MAX];
+	snprintf(path, PATH_MAX, "%s/tmp.mid", SDL_AndroidGetInternalStoragePath());
+	FILE* fp = fopen(path, "w");
+	if (!fp) {
+		WARNING("Failed to create temporary file");
+		(*env)->PopLocalFrame(env, NULL);
+		return NG;
+	}
+	fwrite(data, datalen, 1, fp);
+	fclose(fp);
+
+	jstring path_str = (*env)->NewStringUTF(env, path);
+	if (!path_str) {
+		WARNING("Failed to allocate a string");
 		(*env)->PopLocalFrame(env, NULL);
 		return NG;
 	}
-	jbyte *buf = (*env)->GetByteArrayElements(env, array, NULL);
-	memcpy(buf, data, datalen);
-	(*env)->ReleaseByteArrayElements(env, array, buf, 0);
 
 	jobject context = SDL_AndroidGetActivity();
 	jmethodID mid = (*env)->GetMethodID(env, (*env)->GetObjectClass(env, context),
-										"midiStart", "([BZ)V");
-	(*env)->CallVoidMethod(env, context, mid, array, loop == 0);
+										"midiStart", "(Ljava/lang/String;Z)V");
+	(*env)->CallVoidMethod(env, context, mid, path_str, loop == 0);
 	(*env)->PopLocalFrame(env, NULL);
 
 	midino = no;