I have exactly the same problem: as soon as I scan my library (in my case on a windows server) it crashes with the alignment fault:
Mar 24 12:12:50 volumio kernel: Unhandled fault: alignment fault (0x92000021) at 0x00000000eed726f6
It is unpredictable when the error occurs, not after a certain amount of artist or tracks (this is suggested on other forums). If I edit the mpd.conf to disable ffmpeg, Volumio won’t start at all…
I have 2 raspberry pi’s (a B+ and 3) both with I2C DAC’s and the same Volumio version on it. They connect to the same share with the same settings and they didn’t crash scanning all files (about 80.000 tracks). So it seems a problem specific for the Pine64 (and some other boards I understand). My Pine64 is the model with 2gb memory. All my devices are wired connected on the same local network.
But I mentioned another difference: On the PI’s I don’t need to enter credentials to connect to my network share (this is the correct behaivior), but the Pine64 needs credentials. I does not matter or I use real or fake credentials; it allways connect to the share (it is shared to everyone on the local network).
Hopefully some one is able to find a solution; the pine64 is pretty useless without a fix.