Hiby Music Player is a free lossless HiFi audio player which designed for audiophile and music fans, like Foobar and JRiver, Hiby will bring you high quality music, any time, any where.   Features: 1. All lossless audio format decoding, including DSF,DFF,ISO,WAV,FLAC,AIFF,M4A,AAC,MP3,OGG...

http://www.fiio.com.cn/cn/news/index.aspx   As James says in http://www.head-fi.org/t/681927/reply-to-some-bugs-of-x3-s-new-firmware-and-new-function-suggestions-from-our-end-users , the USB DAC function has been added to FiiO X3! This is the world's first portable player which support this...