[Xiaomi Mi A3 ROMs, Kernels, Recoveries, & Other De] nicolas7bgr:
Sound Quality on Pie Kernel

I find for sure that the sound quality on the pie kernel is worser than on the original Xiaomi Kernel , yes the volume is louder , but 70 percent of these functions in build.prop of system and vendor added by me don't work on your kernel properly - i'm speaking only about the sound modifications written in the build.prop - dalvik.vm.heapstartsize=8m

dalvik.vm.heapsize=256m

dalvik.vm.heaptargetutilization=0.75

dalvik.vm.heapminfree=512k

dalvik.vm.heapmaxfree=8m

ro.hardware.nfc_nci=nqx.default

vendor.hw.fm.init=0

ro.hardware.keystore_desede=true

persist.radio.multisim.config=dsds

persist.vendor.qcomsysd.enabled=1

ro.hardware.fp.fod=true

ro.hardware.vulkan=adreno

ro.hardware.egl=adreno

vendor.power.pasr.enabled=true

keyguard.no_require_sim=true

ro.com.android.dataroaming=false

ro.config.ringtone=MiRemix.ogg

ro.config.notification_sound=pixiedust.ogg

ro.carrier=unknown

ro.config.alarm_alert=Alarm_Classic.ogg

ro.dalvik.vm.native.bridge=0

ro.vendor.extension_library=libqti-perfd-client.so

persist.vendor.radio.apm_sim_not_pwdn=1

persist.vendor.radio.sib16_support=1

persist.vendor.radio.custom_ecc=1

persist.vendor.radio.rat_on=combine

persist.backup.ntpServer=0.pool.ntp.org

sys.vendor.shutdown.waittime=500

ro.frp.pst=/dev/block/bootdevice/by-name/frp

ro.cp_system_other_odex=1

persist.demo.hdmirotationlock=false

persist.sys.sf.color_saturation=1.0

debug.sf.hw=0

debug.egl.hw=0

debug.sf.latch_unsignaled=1

debug.mdpcomp.logs=0

ro.vendor.display.cabl=0

vendor.gralloc.disable_ubwc=0

vendor.display.disable_scaler=0

vendor.display.disable_inline_rotator=1

vendor.display.disable_decimation=1

vendor.display.enable_null_display=0

vendor.display.disable_excl_rect=0

vendor.display.disable_excl_rect_partial_fb=1

vendor.display.comp_mask=0

vendor.display.enable_default_color_mode=1

vendor.display.dataspace_saturation_matrix=1.0,0.0,0.0,0.0,1.0,0.0,0.0,0.0,1.0

ro.vendor.audio.soundfx.type=mi

af.fast_track_multiplier=1

af.resampler.quality=255

vendor.audio_hal.period_size=192

ro.vendor.audio.sdk.fluencetype=fluence

persist.vendor.audio.fluence.voicecall=true

persist.vendor.audio.fluence.voicerec=false

persist.vendor.audio.fluence.speaker=true

vendor.audio.tunnel.encode=false

persist.vendor.audio.ras.enabled=false

persist.dirac.acs.storeSettings=1

persist.vendor.audio.hifi.volume=73

persist.dirac.acs.storeSettings=1

persist.dirac.acs.controller=gef

persist.dirac.gef.ext.did=0xA,0x2D

persist.dirac.gef.ext.mid=0x10012DE1

persist.dirac.gef.int.did=0xF

persist.dirac.gef.int.mid=0x10012DE0

persist.dirac.acs.ignore_error=1

ro.audio.soundfx.dirac=true

vendor.audio.offload.buffer.size.kb=64

audio.offload.min.duration.secs=30

audio.offload.video=false

vendor.audio.offload.track.enable=true

audio.deep_buffer.media=true

vendor.voice.path.for.pcm.voip=true

vendor.audio.offload.multiaac.enable=true

vendor.audio.dolby.ds2.enabled=false

vendor.audio.dolby.ds2.hardbypass=false

vendor.audio.offload.multiple.enabled=true

vendor.audio.offload.passthrough=true

vendor.audio.flac.sw.decoder.24bit=true

vendor.audio.flac.sw.decoder.32bit=true

vendor.audio.flac.sw.decoder.float=true

ro.vendor.audio.hifi=true

vendor.audio.pp.asphere.enabled=false

vendor.voice.playback.conc.disabled=true

vendor.voice.record.conc.disabled=false

vendor.voice.voip.conc.disabled=true

vendor.voice.conc.fallbackpath=deep-buffer

persist.vendor.audio.speaker.prot.enable=false

ro.vendor.audio.sdk.ssr=false

vendor.audio.offload.gapless.enabled=true

vendor.audio.safx.pbe.enabled=true

vendor.audio.parser.ip.buffer.size=262144

vendor.audio.flac.sw.decoder.24bit=true

persist.vendor.bt.a2dp_offload_cap=sbc-aptx-aptxtws-aptxhd-aac

vendor.audio.use.sw.alac.decoder=true

vendor.audio.use.sw.ape.decoder=true

vendor.audio.hw.aac.encoder=true

vendor.audio.noisy.broadcast.delay=600

vendor.audio.offload.pstimeout.secs=3

ro.af.client_heap_size_kbyte=7168

vendor.audio_hal.in_period_size=144

vendor.audio_hal.period_multiplier=3

vendor.audio.adm.buffering.ms=2

vendor.audio.deep_buffer.media=true

vendor.audio.dolby.ds2.hardbypass=false

vendor.audio.offload.buffer.size.kb=64

vendor.audio.offload.gapless.enabled=true

vendor.audio.offload.multiaac.enable=true

vendor.audio.offload.multiple.enabled=true

vendor.audio.offload.passthrough=true

vendor.audio.offload.pcm.16bit.enable=true

vendor.audio.offload.pcm.24bit.enable=true

vendor.audio.offload.pcm.32bit.enable=true

vendor.audio.offload.track.enable=true

vendor.audio.offload.video=false

vendor.audio.parser.ip.buffer.size=262144

vendor.audio.safx.pbe.enabled=true

audio_hal.period_size=192

persist.vendor.audio.fluence.speaker=true

persist.vendor.audio.fluence.voicecall=true

persist.vendor.audio.fluence.voicerec=false

persist.vendor.audio.hifi.volume=73

persist.vendor.audio.hifi=false

# Звук

af.fast_track_multiplier=1

af.resampler.quality=255

audio.deep_buffer.media=true

audio.dolby.ds2.hardbypass=false

audio.offload.buffer.size.kb=64

audio.offload.gapless.enabled=true

audio.offload.multiaac.enable=true

audio.offload.multiple.enabled=true

audio.offload.passthrough=true

audio.offload.pcm.16bit.enable=true

audio.offload.pcm.24bit.enable=true

audio.offload.pcm.32bit.enable=true

audio.offload.track.enable=true

audio.offload.video=false

audio.parser.ip.buffer.size=262144

audio.safx.pbe.enabled=true

audio_hal.period_size=192

media.stagefright.audio.sink=280

persist.audio.fluence.speaker=true

persist.audio.fluence.voicecall=true

persist.audio.fluence.voicerec=false

persist.audio.hifi.volume=73

persist.audio.hifi=false

ro.audio.hifi=true

ro.qc.sdk.audio.fluencetype=fluence

ro.qc.sdk.audio.ssr=false

tunnel.audio.encode=false

vendor.audio.chk.cal.spk=2

vendor.audio.chk.cal.us=0

persist.vendor.audio.button_jack.profile=volume

persist.vendor.audio.button_jack.switch=0

ro.vendor.audio.sos=true

ro.opengles.version=196610

sys.autosuspend.timeout=500000

drm.service.enabled=true

vendor.qcom.bluetooth.soc=cherokee

ro.vendor.iocgrp.config=1

ro.crypto.volume.filenames_mode=aes-256-cts

ro.crypto.allow_encrypt_override=true

vendor.debug.enable.memperfd=true

ro.config.media_vol_default=10

ro.build.software.version=Android9 -

So my question what different audio sources you used on the Pie Bit Kernel in comparison to the original.

Thank you in return for you answer , it's important for me i work with professional audio system's. :)