[ZE620KL] (A10beta V25) Speaker sound very low when the volume set below 80%

[chrisdionleon80]

Please tell us some basic information before asking for help:
Model Name: ZE620KL
Firmware Version:  V17.0615.2005.25
Rooted or not: not
Frequency of Occurrence: always
APP Name & APP Version (If your issue relates to the app): Volume Sound
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
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When I'm using android 10 beta 3 in zenfone 5 the sound from speaker very low when i set it below 80%, when the volume in 50% the sound like muted, i try test my speaker in android 9 and its working fine.

[Christine_ASUS]

Hi Chris
Thank you for your asking. We apologize for any inconvenience caused and your valuable advice will be included in future design and optimization considerations.

If the function is in urgent need for you, please refer to the guide below as 10 to 9 downgrade steps.
1. Download "Version Android 10 downgrade to P" and then put the image file into the root directory of the MicroSD card.
https://www.asus.com/Phone/ZenFone-5-ZE620KL/HelpDesk_BIOS/
2. Insert MicroSD card into phone and then power off the device.
3. Long press with "Power" key and "Volume Down" key together and stop after feel the vibration to enter Recovery Mode
4. Use "Volume Down/Up" key and press "Power" key to choose "Apply update from external storage"
5. Select the downgrade file
6. When the updating process is done, Choose "Wipe data/factory reset" and tap"Yes" to perform the master clear.
7. "Wipe cache partition" > "Yes"
8. "Reboot system now" 
#Android 10 to Android 9 Guide 
https://www.asus.com/support/FAQ/1042349