Sound is dropping out while playing with USB audio device output

cgsong

       I installed MPD client and I play sound files with XMOS USB audio device. Whenever I played MP3 and FLAC audio files with USB audio device, sound is dropping out. When I switch to the ES8323 output, there is no sound drop out. I think there is some problem in USB audio device driver. Could you let me know how to fix the sound drop out?