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Resampling quality changes from attenuation 140dB & length 320 to 160dB & 480.

README.md

@@ -1,6 +1,6 @@
 ## A Magisk module for setting miscellaneous audio configuration values (media audio volume steps (100 steps), disabling the effects framework, raising resampling quality, etc.)
 
-This module changes the number of steps in media volume to 100 steps (0.4~0.7dB per step), disables the effects framework (nearly direct low jitter audio pass), adjusts a USB trasfer period, and raises the resampling quality of AudioFlinger (the OS mixer)  from the AOSP standard one (stop band attenuation 90dB & cut off 100% to Nyquist frequency) to a mastering quality (140db & 91%, i.e. no distortion in a real sense),  and the bitrate limit of bluetooth codec SBC (dual channel mode) for EDR 2Mbps earphones to improve audio quality effectively in a simple manner.
+This module changes the number of steps in media volume to 100 steps (0.4~0.7dB per step), disables the effects framework (nearly direct low jitter audio pass), adjusts a USB trasfer period, raises the resampling quality of AudioFlinger (the OS mixer)  from the AOSP standard one (stop band attenuation 90dB & cut off 100% of Nyquist frequency) to a mastering quality (160db & 91%, i.e. no resampling distortion in a real sense even though the 160dB targeted attenuation is not accomplished in the AOSP implementation),  and the bitrate limit of bluetooth codec SBC (dual channel mode) for EDR 2Mbps earphones, for improving audio quality effectively in a simple manner.
 
 * This module has been Tested on LineageOS and ArrowOS ROM's, and phh GSI's (Android 10 & 11 & 12, Qualcomm & MediaTek SoC, and Arm32 & Arm64 combinations). 
 

customize.sh

@@ -3,5 +3,8 @@
 if "$IS64BIT"; then
  :
 else
-  sed -i 's/ro\.audio\.usb\.period_us=.*$/ro\.audio\.usb\.period_us=5600/' "$MODPATH/system.prop"
+  sed -i \
+    -e 's/ro\.audio\.usb\.period_us=.*$/ro\.audio\.usb\.period_us=5600/' \
+    -e 's/ro\.audio\.resampler\.psd\.halflength=.*$/ro\.audio\.resampler\.psd\.halflength=320/' \
+        "$MODPATH/system.prop"
 fi

module.prop

@@ -1,6 +1,6 @@
 id=audio-misc-settings
 name=Audio misc. settings
-version=v1.0.2
-versionCode=1002
+version=v1.0.3
+versionCode=1003
 author=zyhk
 description=Setting audio misc. configuration values (e.g. 100 volume steps, disabling the effects framwork, raising resampling quality, etc.)

system.prop

@@ -5,6 +5,6 @@ ro.audio.usb.period_us=4000
 persist.bluetooth.sbc_hd_higher_bitrate=1
 af.resampler.quality=7
 ro.audio.resampler.psd.enable_at_samplerate=44100
-ro.audio.resampler.psd.stopband=140
-ro.audio.resampler.psd.halflength=320
+ro.audio.resampler.psd.stopband=160
+ro.audio.resampler.psd.halflength=480
 ro.audio.resampler.psd.cutoff_percent=91