We have developed completely new I2S, S/PDIF digital audio interface (fully complies with PS Audio I2S via HDMI – LVDS standard)  for both Summus and Summus Endpoint. Complete galvanic isolation from computer data lines, grounding and power supply, enables stunning audio performance, surpassing USB output in sound quality.

Two stages of DC ultra-low noise linear power regulation take care of “clean” powering. Within isolated, noise free area, programmable gate array (PGA) under control of audio grade oscillator meticulously reconstructs the audio signal to be delivered to DAC via HDMI cable. Precise signal regeneration virtually eliminates jitter (timing imperfections) on both S/PDIF and I2S outputs.





S/PDIF: PCM < 24/192 Kbps

I2S: PCM < 24/768 Kbps     DSD < 512x





Stylus audio player and library manager

Roon audio player and library manager

Transforms Summus into endpoint machine

Stylus library manager / HQ Player

Roon library manager / HQ Player

Roon library manager / Stylus audio player


Obtaining high end audio playback by using Intel 4 core CPU, whose lightning performance is achieved by earsplitting 3.7 billion internal clock ticks each second, is not an easy task. This is why we developed Summus Playback Mode – a software that goes beyond and restrains hardware imperfections. Activation of Stylus audio player and library manager, automatically assigns transport of music files to separate CPU cores and turns down high-powered and noisy 4 core CPU platform into completely silent audio transport.

Furthermore, Euphony Summus is booted by default into so called “ramroot” mode (widely embraced by audiophiles worldwide as the best for computer audio), allowing all system files to operate from RAM. Total absence of disk activities combined with near noise free CPU, makes Summus music server a dream come true for computer audiophiles.



“And regardless of what mode I listened in, the sound quality was really superb, although it goes without saying that the two ramroot-based modes offered really exceptional sound quality.”      Tom Gibbs, Positive Feedback


  • Intel 4 core 3.7 GHz CPU
  • RAM 16GB
  • SSD M.2 1TB (base system)
  • Euphony Summus license





“I am talking about the $5k-15k music servers of the world, but also crazy-expensive disc transports which cost as much as a Honda Civic. I’ve had more than my fair share of that sort of thing in my rig and I’d take the Summus over any of them.”         John Grandberg, Head-Fi


“Sometimes a clever designer will extract more sonic goodness, for a lower price, and do so without much fanfare. The Summus is just this sort of device. If you are seeking top-caliber playback in a music server/streamer/whatever you might call it, Summus is definitely worth a look.”                      John Grandberg, Head-Fi


Introducing a new Euphony playback system utilizing two Summus units. One functions as a server and one as an endpoint. By isolating serving and playback tasks between two galvanically isolated systems, we have achieved further major improvements of audio fidelity. Using a direct, wired LAN connection between the two units, streaming jitter is completely eliminated by removing routers and switches from the network signal path. The system also benefits further by having separate power supplies for each unit. Stylus Endpoint playback optimization (Summus Playback Mode) is automatically enabled when both machines operate together.

Adding I2S and S/PDIF digital audio outputs to Endpoint unit, makes the combination of Summus music server and Summus Endpoint ready for comparison with any existing music server/endpoint setup on high end audio market, regardless of the price.

There is simply no better way to stream music to your USB DAC!



  • Intel 2 core CPU 3.6 GHZ
  • RAM 4GB
  • SSD M.2 256GB
  • Euphony Summus Endpoint license