I'm experiencing horrible crackling sounds when the SP2016 is in a signal chain…even when bypassed. I'm on Yosemite and this is occuring with the AU and VST versions in both Logic 10.2.4 and the latest version of Blue Cat's Patchwork. It's as if the audio is clipping, but this isn't reflected in the meters at all and also regardless of sample rate!
Thanks for alerting us. We're looking into it now.