Sony Mobile has enhanced the audio capabilities of the Xperia XA2 and Xperia XA2 Ultra, by officially enabling high-resolution audio and DSEE HX in the latest firmware update (build number 50.1.A.13.83).
DSEE HX (Digital Sound Enhancement Engine) upscales your existing audio to near high-resolution quality, while high-resolution audio requires the use of a compatible headset. Seems like a decent update for Xperia XA2 and XA2 Ultra owners.
索尼移動通過在最新的固件更新（版本號50.1.A.13.83）中正式啟用高分辨率音頻和DSEE HX，增強了Xperia XA2和Xperia XA2 Ultra的音頻功能。
DSEE HX（數字聲音增強引擎）可將您現有的音頻升級到接近高分辨率的質量，而高分辨率音頻則需要使用兼容的耳機。 對於Xperia XA2和XA2 Ultra用戶來說，這似乎是一個不錯的更新。
資料來源
https://www.xperiablog.net/2018/10/01/high-res-audio-and-dsee-hx-added-to-xperia-xa2-and-xa2-ultra/
