PS Audio Music Server In The Pipeline?


Indeed, this is all true. Thanks Steven.


I am currently using roon nucleus and the ps audio directstream with the bridge II…works great


Me too !! It sounds great.


Yes, this Nucleus+ w/ Convolution Filtering and Bridge II is the bomb. I just started using my Utopia headphones with Nucleus+ Roon cross feed DSP and man is that amazing. No HP fatigue. Yeah, Roon years ago is not this Roon OS on Roon HW… Just think, $1500 solution that sounds great. Going to the Nucleus+ and CF was worth the additional $1,000. Now add Sbooster LPS, powered from a P20 and there you have amazing SQ for $3K…

If Roon ever decides to integrate HQ Player for the Nucleus/Nucleus+… a game changer for sure…


Just wondering - what’s “Convolution Filtering” and why would you need the bridge if your using the Nucleus?


The Roon Nucleus connects to your network via Ethernet to the Bridge.



I’m quoting you below from one of your daily posts because it seems really interesting AND, I think, a substantial discovery. Or, has this been known for a long time?

" …A FLAC file (for example) requires far more bit crunching to extract the original bits than does a WAV file. Those crunched bits contaminate the final output signal through mutually shared power, ground and physical signal traces."


It’s been known by us for a while. I don’t think it’s known or recognized by many other companies.


Convolution Filtering is a DSP option in Roon that adds a room filter to your Nucleus+ (need the + for higher performance I7 as opposed to I5 platform). This CF is implemented by sweeping your room and sending the results to a company that specializes in CF. You add the CF to adjust for room acoustics. This filtering plus good room treatments results in amazing SQ. Below are a few links to help you understand the theory, implementation and company that provides the service. Personally, I would not buy a server that does not offer this DSP option, the reason I went Nucleus+ as opposed to PSA. I asked 6 months ago f the Octave was going to have CF and the answer was No. I find this DSP option amazing.

Adding a CF costs ~$200 for the filter from HAF. Use REW (Room Eq Wizard) software w/ usb mic to sweep your room. Cost me $100 for the equipment. Sweeping the room is a given to first understand what room treatments you will need to arrive at better SQ. Born out of that process, since you have swept the room already is getting a CF filter for combined better SQ. Every room has issues unless you design the room and even then, there are issues. CF is one tool used to combat poor room SQ. The reason I would never get a server that did not have this capability. When I move, I can take my server and set up the next apartment or home.

Just so we are clear; my PSA DMP does not have this CF capability, my Nucleus+ has it so streaming just got so much better. I thought my DMP was the bomb till I implemented my Nucleus+ w/ CF. It was a game changer for me. Streaming is the ticket…

Convolution is a term used in Laplace; it looks like multiplication. X(s) * H(s) = Y(s). X(s) is the input; H(s) is the transfer function of a system; Y(s) is the output. You multiply (convolve) the system transfer function by the input to produce the output in the complex domain (s). The room filter is convolved (H1(s)) by the signal path input (X(s)) to produce an adjusted SQ output (Y(s)). There is also z transform for the digital domain. Hope this helps…

Home Audio Fidelity

Roon Discussion

Roon Nucleus uses Ethernet to communicate. I have an AQVOX-SE switch between the router (in another room) and the PSA DAC & Nucleus+. The Block Diagram above in this post will illustrate the Nucleus+ configuration.


Wasn’t aware of this technology. So no Ill effects from the eq - all the processing happens before the DAC?


Yes, I get benefits, no SQ detriment, SQ better… CF has been around for a while… removing the CF is a switch (Roon DSP) so you can A/B it to make sure there is SQ benefit, not detriment. Always listen to your ears, they are the true tell of amazing SQ. I always listen and pay very little attention to words. In the end I am left with the bill for stereo and I am left with the results. Spend the time listening to your system and trust yourself.


Nice - Very cool technology.


Regarding flac vs. WAV, I had an interesting experience listening to a track I have several versions of. It seems the 44.1 16 bit WAV sounded as good or better than the 24/96 flac. Converting the hi res flac to WAV yielded the best results, but interesting to think how much sonic compromise there is in the real-time uncompressing.


It seems strange to me that the flac decompression wouldn’t happen all at once, over the course of a second or two at most…then the resulting wav would play.

I’ve not bothered with the comparison as there are so many other variables that impact what I hear or not.


Yup, for this reason companies like Roon have long recommended separate server and separate ‘endpoint’ (isolated by ethernet or fiber connection) - compared with a direct USB connection (for example) between server and DAC.

A networked DAC (ethernet/fiber input) with Roon achieves the same, as long as the DAC has properly designed around the network input well (noise isolation from the rest of the DAC, especially analogue section, for example). In this case, Roon decodes the files at the server (Roon Core) end, NOT at the PSA Bridge end.

And obviously the PSA Music Server is going to pay a lot of attention to isolating it’s output for connection to the DS, with it’s AGAI solution.



Do you have a ballpark price for this new server? I’m in the market for one, but can wait a few months if I think it is within my budget.

Thank you,



No exact price tag yet although Paul has hinted something in the region of US$ 6k.


Between $5K and $6K depending on the final BOM (Bill of material).


Geno, it will be longer than a few months for the PS server to be released, but if you’re serious about top sound quality it will be more than worth the wait. In the meantime you can just use a standard computer and something like jriver. I think PS’s new server is going to be more like an audio device in the sense that it will be a product you have in your system for the next decade or more, (as opposed to looking at it as a computer, which becomes outdated much more quickly), and that’s worth the wait and expense.


In addition to a server, is PS Audio considering offering a pure network player?