If you take a look at the AndroidManifest.xml file for the latest core Music app, it may shed some light on the options that you have. For example:
<activity android:name="com.android.music.MusicPicker"
android:label="@string/music_picker_title" android:exported="true" >
<!-- First way to invoke us: someone asks to get content of
any of the audio types we support. -->
<intent-filter>
<action android:name="android.intent.action.GET_CONTENT" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.OPENABLE" />
<data android:mimeType="audio/*"/>
<data android:mimeType="application/ogg"/>
<data android:mimeType="application/x-ogg"/>
</intent-filter>
<!-- Second way to invoke us: someone asks to pick an item from
some media Uri. -->
<intent-filter>
<action android:name="android.intent.action.PICK" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.OPENABLE" />
<data android:mimeType="vnd.android.cursor.dir/audio"/>
</intent-filter>
</activity>
So based on this, you might first try
final Intent intent2 = new Intent(Intent.ACTION_GET_CONTENT);
intent2.setType("audio/*");
startActivityForResult(intent2, 1);
and see if it fits your needs. You may also look at adding the category flags noted in the above example to help narrow down the results (e.g. OPENABLE
should filter to only content that can be opened as a stream.