「設定」⇒「ミュージック」より「音量の自動調整」の項目をオフにして下さ

「設定」⇒「ミュージック」より「音量の自動調整」の項目をオフにして下さい。
※同機能をオンにしたままですと、上記現象が発生することが確認されております。

Results (English) 1:

"Settings" ⇒ Please turn off volume adjust item than the music.
* Happen above and leave the feature selected is has been confirmed.

Results (English) 2:

Turn off the item of "automatic adjustment of volume," "Settings" ⇒ than "music".
※ If you are still you turn on the same function, that the above-mentioned phenomenon occurs is has been confirmed.

Results (English) 3:

"」⇒「 music from please turn off automatic volume adjustment For the estimation of the function is turned on, and it is confirmed that the above phenomenon At