The user experience with HQPlayer could use some work. But the creator, Jussi is very responsive, and I'm finding the community around HQPlayer to be active and willing to share their knowledge. After fiddling with this software project for a while, I'm pleased with the sonic results now. I've picked out a set of filters and modulator that take about 7 seconds to render at a resolution of DSD128 with my current computer hardware. From a usability perspective, I feel that 6-8 seconds is about the limit I'm willing to wait for playback to begin. I image that increasing my computer's compute power will allow playback to start sooner and/or allow for higher resolutions of DSD.