this .dtb will only work if you are using kernel >= 5.6.x   For older kernels you could try - as did wrote on Thursday:   For a older kernel like the 5.4 you could try older .dtb's from this thread: from 30.09.2019: sun50i-a64-nanopi-a64_fixed_usb_audio.dtb https://forum.armbian.com/applications/core/interface/file/attachment.php?id=5250 or from the 23.11.2019: sun50i-a64-nanopi-a64.dtb_7nd https://forum.armbian.com/applications/core/interface/file/attachment.php?id=5490