Samsung tablet s6 lite

Please reset all settings of your's device in general management settings then try to it's again. If you like please accept as a solution it's help to others users also, click on 3dots in my reply section and click on accept solution. Thanks.

Your's most welcome to here.

Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your concern, we would request you to kindly perform the following steps to resolve your issue.

Disconnect anything plugged into the headphone jack like, a selfie stick, headphones, Bluetooth, etc.
Remove any third-party case, protective films, or any other accessory that usually comes in contact with your device.

Check device volume settings: Tap on Settings > Sound & vibration>Volume > Drag the volume adjustment bar left or right to increase or decrease the device volume.
To verify, play music and check the music sound. If the sound quality is good, then your speaker is working fine.

Clear Sound Picker data: Settings> Apps> Filter and Sort> Enable Show system apps> OK>Search Sound Picker> Storage> Clear data of Sound Picker.

Clear Sound Alive data: Settings> Apps> Filter and Sort> Enable Show system apps> OK>Search Sound Alive> Storage> Clear data.

Clear Adapt sound data: Settings> Apps> Filter and Sort> Enable Show system apps> OK>Search Adapt Sound> Storage> Clear data.

Reset app preferences: Settings> Apps> Three dots> Reset app preferences> Reset.

Update the software if available: https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-smartphone-how-to-update-software/

You can reset your device by following the steps from the below link.
https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-mobile-how-to-perform-a-factory-reset/

In case the issue still occurs, kindly report the problems with a log file. To share a log file, click on the Samsung Members Application (Open Samsung Members Application > Support> Tap on error report > Type your query > Send).

Warm Regards,
Samsung Customer Support