why not use 3.14 kernel?

linux.aarch64.conf

Linux/arm64 5.1.0 Kernel Configuration

when 5.1.0 kernel is work, the BlueTooth Speaker can link the box, but it make soud intermittent.

LibreELEC-AMLGX.arm-9.80-devel-20190820163006-07b919f-s905

is very good. my bt speaker is good..thanks to 150balbes