Hardware is supported, but Samsung obviously didn't pay the patent fee to Qualcomm (aptx-hd) for the software, so it doesn't support it.
Samsung S9+ does not fully support wireless codec system, aptX HD cannot, and supports LDAC. Qualcomm aptX HD and Sony LDAC are the same generation technology. The former has the same sound quality as the latter, and even has the characteristics of more stable connection and more earphone brands. If you want to support LDAC, you can only choose Sony headphones.
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Samsung S9' s performance in internal playback can meet the listening needs of ordinary consumers, but there is still a big gap between wired listening ability and professional Hi-Fi mobile phones. It is also a pity that wireless does not support aptX HD. Fortunately, LDAC performs well, but occasionally the connection is not stable enough, and there are cases of automatic fast forward when playing songs.
Samsung S9+ has built-in Qualcomm Aqstic WCD934 1 decoding chip integrated on Snapdragon 845 platform, which supports 32-bit hardware decoding DSD64/128; Built-in Bluetooth 5.0, compatible with SBC, AAC, aptX, LDAC, Samsung HD and Samsung extensible codec technology, equipped with AKG tuning dual speakers, supporting Dolby panoramic sound.
Samsung S9+ integrates a speaker at the receiver and the bottom, which is Samsung's first mobile phone equipped with dual speakers and tuned by AKG. Compared with NOTE E8E8 with single speaker, S9+ songs with double speakers sound more layered and three-dimensional, with louder volume, thicker and fuller sound and no staccato.
In addition to AKG tuning, Samsung S9+ also has built-in Dolby panoramic sound, and the entrance is integrated in the shortcut menu of the mobile phone notification bar. Dolby panoramic sound can be divided into four options: automatic, movie, music and voice. When the switch is turned on, the sound will be optimized whether it is put in or put out.