I agree with you @MySound and after it became apparent that the proposed implementation with HQP would result in output through HQP I approached @jussi_laako on the CA forums and suggested that a “DSP” style version of HQP where output was looped back to Roon (or any other player) might open up a new market.
Jussi did not rule out the possibility, but noted that it could have an effect on SQ compared with the NAA output in HQP.
At the time I had no experience with an NAA, but I’ve since listened to Roon/HQP through an NAA on three devices. Apart from some artifacts in the Raspberry Pi when upsampling to DSD128 (see thread in this section) arising from the implementation of USB in the Pi (nothing to do with HQP), they all worked flawlessly and delivered excellent results.
I think a battery powered BBB running Jussi’s 134MB NAA image is the lowest cost small footprint renderer around. A CuBox-i is a little more expensive, but easier to setup and likely to give better results in a more demanding HQP configuration than I was using.
So I have a lot of respect for the NAA solution and am particularly pleased that Jussi has enabled such an inexpensive high quality rendering solution.
I still believe there is a market for a DSP style of HQP and tighter integration with Roon. The absolute SQ may not be as good as an NAA, depending on what RoonReady or RoonBridge device we are talking about, but it is likely to be better than direct DAC connection to a noisy computer. It would also open up a lot more Wi-Fi choices for users.
Now, however, may not be the best time to expend resources exploring such further integration. There are other important developments in Roon which deserve equal if not greater support. MQA is lurking and it’s not yet clear what a software decoder might look like and how MQA and HQP might interact.
In my ideal world, MQA and HQP would know enough about each other so that MQA software decoders in Roon and Tidal could take advantage of HQP’s filters as well as the end DAC. I’m not confident that this ideal world will come to pass. It’s a bit like hoping for peace on Earth and goodwill among men.
What has considerably brightened the landscape, however, is the mutual trust and assistance shown between Roon and HQP. The recent bug squashing efforts on both sides of the relationship have been most encouraging. I’m looking forward to what they each do next.