You can connect a CD player or another external audio source to the AUX IN jack, and use the Key Transpose function to change the pitch of the song upward or downward by as much as one octave.是什么意思_You can connect a CD player or another external audio source to the AUX IN jack, and use the Key Transpose function to change the pitch of the song upward or downward by as much as one octave.在线翻译_英语_读音_用法_例句