I'm just uploaded to 1.30 base from 1.23, but I don't "see" too much difference in listenings... I'm waiting your pro comments 

there are 3 versions 1.30 base, pure1 and pure 2 version 1.30 base should resolve tags problems (from version 1.22) and is added new CPLD algorithm pure1 is enhanced for vocals but is compatible with WAV, DFF, ISO, not supported APE, FLAC,MP3 (not tested by me) pure2 is compatible only for...

Aune M2 firmware update 1.30 is out only in chinese site: http://cn.auneaudio.com/index.php?s=/Home/Article/gjxzhz.html

I use thr iphone recharger and works fine

on auneaudio (cinese version) I didn't find the version 1.23 but this one  M2_1.20_纯净版 8.94mb 2016-07-12  dated 12 july 2016...   a version 1.20 that optimized for DFF, WAV and ISO, not support FLAC, MP3, ALAC    anyone can explain???

Aune M2 music player support natively DSD format (has it's dedicated chip) or transcode music in PCM? eventually at which specs?