I forgot i need the default.prop as well
i found default.prop on file system/vendor
flashed now for 3 times
1. flashed G8141_Customized DE_1308-5289_47.2.A.10.80_R6C (no Boot)
2. flashed TWRP 3.3.1-0
3. flashed Magisk 19.3 via TWRP
4. fully booted
5. wiped cache, data, dalvik (at this point i get message that data is unmoun...
i was reinstall now without wipe cache/dalvik and everything is ok . i sorry for i tired you all with me :)
With a file manager, go to system/app/SoundEnhancement folder, is there a oat folder inside?
i found just SoundEnhancement.apk
Beetle84 thannnk you very much . work fine now :)
i think the problem was with magisk 19 . then i install 18 all is ok now