I can't disable all audio effects on my device(Xiaomi 11T) about hifi-maximizer-mod

[yzyhk904]

I think it isn't any effect handled by the effects framework on Android. For example, DRC (Dynamic Range Control; in short a kind of compression) is forced for all audio outputs on almost only Snapdragon devices in audio hal's or external USB devices. MTK devices don't force DRC by default.

By any chance, you feel no DRC on MTK devices? You can check this by USB SampleRate Changer with/without "--drc" option.

[jyuuren]

I executed USB Sample Rate Changer script with and without "--drc" option and it seem to make no difference at channel mismatch.

[yzyhk904]

Did you set the mount mode of a name space in Magisk to be global?

If so, I have no idea for such mismatch.

[jyuuren]

I did change namespace to global, issue still persists. I think issue caused by Mediatek Aurisys DSP libraries but when i nullify the "libaurisysdemo.so" file which is at /vendor/lib, audio function of the phone lost compeletly which prevents me from disabling mediatek related audio dsp libraries. Also my phone has special partition which is called "audio_dsp.img" at fastboot ROM images. I think this issue related with those things.

[yzyhk904]

Do you use HyperOS or MIUI on your device? I've been feeling somewhat strange sound (not mismatch) on HyperOS. I guess this effect from its volume manager.

If you feel the same as I, install GSI by using DSU. The effect would disappear on an AOSP GSI ROM.

[jyuuren]

I am currently using MIUI 13. I tried multiple GSI ROMs including AOSP GSI but these did not fixed it. GSI ROMs also had vendor folder so i guess that's why it didn't get fixed.