The normal phenomenon is to play left channel audio files, left speaker playback; Play right channel audio file, right speaker play, but the problem is whether play left or right audio file, left and right speakers have played

Schematic design

Hardware \qcom\audio\configs\msm8953\mixer_paths_mtp.xml

It was commented out at that time, and it’s ok to open it again. Because the hardware design uses the headphone jack, so the content under “speaker” in XML is obtained from the headphones jack below