I thought I'd throw my 2c in, having just loaded up my Pi B+ with Pi-DAC+ tonight.
I was also having major stuttering problems with my 24/192 FLACs as well. I updated via git like a previous poster and I too dropped from 70%+ CPU to an average of 20%. I was also having the issue with the UI locking when updating MPD settings. That was also solved with the git update.
Now I have the very slightest stutter at the start of a new track. I have tried various combinations of audio buffer and % to load before play, nothing seems to make a difference. I'm using the Edimax wi-fi nubbin but I get the same behavior via ethernet.
I'm attaching my debug info but just as an aside, when I went to the debug page I got a hard stutter in the playback, again, 24/192 FLAC.
So far I'm very happy with RuneAudio, the Pi, and the Pi-DAC+. I'll anxiously await further refinements and updates.
My 24/192 FLACs are from my own needledrops...the audio is just fantastic. Pretty much as good as a self-burned DVD-A of the same files played in my Denon DVD-5900 reference multiplayer.
Thanks. Expect a donation when payday rolls around again (blew all my fun money on the Pi!
)
EDIT: I too seem to have the UI bug where it indicates the RPi HDMI output but I clearly am working with the Pi-DACs RCAs
Synology DS214+ -> RP3 -> Hifiberry Digi+ -> Audio-Gd NOS1704 (coax) -> Audio-GD C-2 preamp/headphone amp ->
1) Yamaha M-4 Power Amp -> Energy Pro 22 Speakers OR 2) HiFiMan HE-400i
Audio Nirvana!!!