Vivo Xplay & SunRise DA-P1 USB DAC/amp:
"Xplay external decoding good partner - SunRise DA-P1 linked through OTG connection. It sounds very good and significantly enhances the sound quality. Good sound choice to Android phones!"
Yep... but are we sure that the Signal is not down-sampled to 16/44 when coming through OTG ? ??