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1. Tuned the USB period size for Tensor devices (2625 usec to 2250 usec)
2. Fixed for Pixel 8's

README.md

@@ -72,7 +72,7 @@ For maximizing the audio fidelity, this module reduces less than 50Hz (more than
 
 * See also my companion script ["USB_SampleRate_Changer"](https://github.com/yzyhk904/USB_SampleRate_Changer) to change the sample rate of the USB (HAL) audio class driver and a 3.5mm jack on the fly like Bluetooth LDAC or Windows mixer to enjoy high resolution sound or to reduce resampling distortion (actually pre-echo, ringing and intermodulation) ultimately.
 
-* Tips: If you use "AirMusic" to transmit audio data, I recommend setting around 4601 msec additional delay to reduce jitter distortion on the AirMusic panel to display target device(s).
+* Tips: If you use "AirMusic" to transmit audio data, I recommend setting around 4599 msec additional delay to reduce jitter distortion on the AirMusic panel to display target device(s).
 
 * Note1: Please remember that this module will stop the thermal control (including CPU core controls, CPU hotplugs and thermal services), the "logd server" and the "camera server" (interfering jitter on audio outputs), disable SELinux enforcing mode and doze (battery saver while idling) on your device. If you like to enable these features, modify variables in "service.sh", respectively. Especially, note that the "Youtube" app became recetly to need the camera server for launching for some unexplained reason.
 

changelog.md

@@ -1,5 +1,9 @@
 ## Change logs
 
+# v2.5.4
+* Tuned the USB period size for Tensor devices (2625 usec to 2250 usec)
+* Fixed for Pixel 8's
+
 # v2.5.3
 * Changed the re-sampling parameters for Galaxy S4 to the general purpose ones (optimized for 3.5mm jack; not USB DAC's)
 * Reduced I/O scheduling jitter on Tensor and SDM660 devices

customize-functions.sh

@@ -246,12 +246,12 @@ function replaceSystemProps_kona()
 function replaceSystemProps_SDM845()
 {
     sed -i \
-        -e 's/vendor\.audio\.usb\.perio=.*$/vendor\.audio\.usb\.perio=2750/' \
-        -e 's/vendor\.audio\.usb\.out\.period_us=.*$/vendor\.audio\.usb\.out\.period_us=2750/' \
+        -e 's/vendor\.audio\.usb\.perio=.*$/vendor\.audio\.usb\.perio=2500/' \
+        -e 's/vendor\.audio\.usb\.out\.period_us=.*$/vendor\.audio\.usb\.out\.period_us=2500/' \
             "$MODPATH/system.prop"
     sed -i \
-        -e 's/vendor\.audio\.usb\.perio=.*$/vendor\.audio\.usb\.perio=2750/' \
-        -e 's/vendor\.audio\.usb\.out\.period_us=.*$/vendor\.audio\.usb\.out\.period_us=2750/' \
+        -e 's/vendor\.audio\.usb\.perio=.*$/vendor\.audio\.usb\.perio=2500/' \
+        -e 's/vendor\.audio\.usb\.out\.period_us=.*$/vendor\.audio\.usb\.out\.period_us=2500/' \
             "$MODPATH/system.prop-workaround"
 }
 
@@ -276,12 +276,12 @@ function replaceSystemProps_MTK_Dimensity()
 function replaceSystemProps_Tensor()
 {
     sed -i \
-        -e 's/vendor\.audio\.usb\.perio=.*$/vendor\.audio\.usb\.perio=2625/' \
-        -e 's/vendor\.audio\.usb\.out\.period_us=.*$/vendor\.audio\.usb\.out\.period_us=2625/' \
+        -e 's/vendor\.audio\.usb\.perio=.*$/vendor\.audio\.usb\.perio=2250/' \
+        -e 's/vendor\.audio\.usb\.out\.period_us=.*$/vendor\.audio\.usb\.out\.period_us=2250/' \
             "$MODPATH/system.prop"
     sed -i \
-        -e 's/vendor\.audio\.usb\.perio=.*$/vendor\.audio\.usb\.perio=2625/' \
-        -e 's/vendor\.audio\.usb\.out\.period_us=.*$/vendor\.audio\.usb\.out\.period_us=2625/' \
+        -e 's/vendor\.audio\.usb\.perio=.*$/vendor\.audio\.usb\.perio=2250/' \
+        -e 's/vendor\.audio\.usb\.out\.period_us=.*$/vendor\.audio\.usb\.out\.period_us=2250/' \
             "$MODPATH/system.prop-workaround"
 }
 

jitter-reducer-functions.shlib

@@ -1010,6 +1010,10 @@ function getSocModelName()
                 echo "$modelName"
                 return 0
                 ;;
+            zuma )
+                echo "gs301"
+                return 0
+                ;;
             * )
                 case "`getprop ro.boot.hardware`" in
                     qcom )
@@ -1394,7 +1398,7 @@ function getSchedulerNrRequests()
                                 echo "86163"
                                 ;;
                             sdm8* )
-                                echo "86171"
+                                echo "86167"
                                 ;;
                             sdm* | msm* | sd* | exynos* )
                                 echo "86163"
@@ -1419,7 +1423,7 @@ function getSchedulerNrRequests()
                                 echo "86163"
                                 ;;
                             sdm8* )
-                                echo "86171"
+                                echo "86167"
                                 ;;
                             sdm* | msm* | sd* | exynos* )
                                 echo "86163"

module.prop

@@ -1,6 +1,6 @@
 id=hifi-maximizer-mod
 name=Hifi Maximizer
-version=v2.5.3
-versionCode=2503
+version=v2.5.4
+versionCode=2504
 author=zyhk
 description=A module for maximizing the digital audio fidelity by reducing jitters on audio outputs (USB DACs, Bluetooth a2dp, DLNA, etc.)