請確認與其它喇叭同主題且同時播放。
Make sure to play the same theme and at the same time as other speakers.
提示：五聲音階、六聲音階、七聲音階、八聲音階其一。
Hint: One of the pentatonic scale, hexatonic scale, heptatonic scale, or octatonic scale.
Note: 此答案為終極密碼的第三個數字。 This answer is the third digit of the final password.