I have the same problem and similar setup. I'm also listening to Qobuz in hifi, though on a Mac Air with Mavericks with 4GB RAM (I know that probably isn't enough according to the Pure Music website), connected via a HiFace Evo to a Counterpoint DA-10a DAC. Similarly, no noise when I select HiFace Evo as the Audio Output Device in Qobuz. Did you have any luck finding a solution? Thanks.