i received the device yesterday and i was very disapointed !
for introduction, i own the aune s16 and i was very happy with it, so i was thinkin that aune is serious.
but i was shocked about the aune s18, a peace of crap !
why ?
first i put the same card in the aune s18 that i use for the fiio x3, so far so good, i connect the aune s18 with aune s16 with optical cable.
a lot of music albums in flac i can't listen, the message on the display was "can't play"
curious, because the same music i can listen without problems on the fiio x3, okay, try 24bit and higher sampling rates than 44.1, horrible !
a lot of noises and errors in the music, absolutely no plessure to listen, change other optical cable, no difference, change to coax, the same bad noises and errors. with the same coax cable i connect the fiio x3 with the aune s16 and all the hd music is no problem, no bugs, no noises, only music.
i have a michael jackson album thriller in 176.4khz, no way to skip tracks and the display shows weird times on.
okay, maybe i need a firmware update, connect to network and try very often to update, but it looks like a bug and the device reset.
the remote control looks cheep, when you shake it than you hear like its broken,
i contact the seller and i send back.
500$ for that is to much, you can only listen to sd card, network is not working, no way to get your music from a nas, a horrible display with errors (some arrow-bugs are sometimes show)
to browse files you can't go more up than on top, for example, a band name with "z" you have to go all the way down, that means you push the down button very often

for my, i think aune needs some software programmer to make it more easyer for the user.
the seller ask for a change, but i want not, i pay 200$ more and i order a soundaware d200, for this price i get more connectivity, a better display, usb connection, and the possibility to controll it with a tablet,
shame on you aune !
for later posts i have firmware 1.0.7