On Wetek Hub (LE 7.90.006), playing music results in constant clicking/glitching. The louder the music the louder the clicks. I'm using a USB Dac (Cambridge StreamMagic 6) for audio. No glitching with movie audio - it only happens when playing music.
I don't get glitching playing music through HDMI, but that is clamped at 48 kHz.