The Aerophone Pro AE-30 built-in speakers remain on by default, even when headphones are connected to the PHONES jack. To mute the built-in speakers automatically when headphones are connected, set "Speaker Setting" to "Auto".
- Press the [MENU] button.
- Use the [-] [+] (◀/▶) buttons to select “Speaker Setting”, then press the [MENU] button.
- Select “Auto” with the [-] [+] (◀/▶) buttons.
- Press the [SCENE] (▲/▼) buttons to return to the scene screen.