alsa-project/alsa-ucm-conf issue #595 was opened from valpackett: The headphone enable sequence for all Qualcomm devices sets `CLS_H_ULP` mode: https://github.com/alsa-project/alsa-ucm-conf/blob/1b69ade9b6d7ee37a87c08b12d7955d0b68fa69d/ucm2/codecs/qcom-lpass/rx-macro/HeadphoneEnableSeq.conf#L1-L3 I was trying to figure out why I was getting horrendous distortion on the headphone jack of my Dell Latitude 7455 laptop above a certain relatively-quiet volume level. After lots of fiddling and searching (thanks, [XDA forum audio modders](https://xdaforums.com/t/mod-audio-biquads-utilizing-qualcomms-audio-codec-for-headphone-compensation.3093000/post-72175274) from several years ago!) I figured it out. Changing that to `CLS_AB_HIFI` has completely fixed the distortion! Should the default be changed to a HIFI mode for everyone, i.e. right in that file? ping: @Srinivas-Kandagatla Issue URL : https://github.com/alsa-project/alsa-ucm-conf/issues/595 Repository URL: https://github.com/alsa-project/alsa-ucm-conf
