Mivera Audio Superstream digital transport


"The Superstream is built in a completely modular form factor. You will never have to buy a new Superstream to upgrade. All upgrades will either be software based, or replacement of internal modular boards. In 15 years from now the Superstream will look exactly the same, only upgraded. In our opinion, this is the ONLY way to make an audio product with real intrinsic value. Look at the Klipschorn as a great example of real value. In production since 1947, and you can still upgrade the 1954 model to today's standards. This is how all of Mivera Audio products will be built. Timeless. An investment rather than a liability. The Superstream also comes with an industry leading 10 year warranty for the piece of mind that we have confidence in the quality of our parts, and willing to back it up."

This beautiful little transport is our vision of SOTA circa 2016. It has 3 different modes it can run:

1: Roonserver: In this mode it runs the Roon core. Roon is the best software we have seen yet for audio players. It also integrates Tidal streaming service so you can tap into 40 million + songs all in full CD quality. If you haven't heard of Roon yet, you have been hiding under a rock. This is simply the best GUI out there. Maximum resolution support with Roon and the Superstream is PCM 24/384, and DSD 256.


2: Hqplayer NAA: In this mode you can take advantage of the SOTA upsampling/modulation software called Hqplayer by Signalyst in Finland. If your DAC is has a DSD bypass mode, or is a discrete 1 bit DSD design, this software can convert PCM to DSD with extremely good algorithms in order to take advantage of the clean simple signal path in the DAC. The main complaint with the software is how complicated it is. We have made that simple with a compact turnkey optional engine for the Superstream, called the Superserve. The Superserve can fit in the palm of your hand, yet still has the power to upsample all audio resolutions PCM and DSD to DSD 512 using the toughest filter/modulators Hqplayer has. Maximum resolution support with NAA and the Superstream is DSD 1024 and PCM 32/768.

3: Airplay: Well most know what airplay is by now. This allows wireless streaming from any Apple device in resolutions up to 24/192 PCM to the Superstream. You will be shocked to hear how good this mode actually sounds with the Superstream.
No matter which mode is chosen, the Superstream runs a purpose built, realtime version of Linux in command line mode, custom tuned to run the audio application, and only the audio application. By doing this, 100% of the computer resources are dedicated to audio. This makes a huge difference in sound quality.
100% of the control of the Superstream is handled with the Roon app on Ipad, Iphone, Android or Laptop. The Roon app is all that you need to learn how to run, because that's the only way to interact with the Superstream. There's no ports for a monitor, keyboard or mouse.
For hardware, the computer board is a custom unit, tuned for audio specific use. It has a very low noise footprint, and doesn't run any of the extra chips that general purpose computer boards have on them for general purpose computing. 

This board is powered by a revolutionary ultra low noise power supply that was designed for delicate instrumentation, and medical life support equipment. Because of this, the output is like a pure sine wave, and the mains noise rejection is outstanding. The EMC and EMI performance is outstanding as well, with only 25 uA of current leakage. What this means is both the USB output, and your power grid will be free from contamination. 
The case is made to very high standards from CNC machined aluminum plate, and high quality aluminum extrusions.
And last but certainly not least is the ST fiber optic Ethernet input. This isolates 100% of the noise on the network from getting into the Superstream. This ensures no matter what else is in the network chain, everyone will get consistent results.
As far as resolution support goes, this unit can handle up to DSD 1024, and PCM 32/768. So it will be up to date for many years. The operating system runs on a microSD card, so updates are super simple.
Later this summer we will be introducing a companion unit to turn the Superstream into a Superstream Pro. This unit will run the incredible Ravenna Audio over IP protocol to convert the audio to the cleanest signal possible. It will be another box exactly like the Superstream that the Superstream will sit on top of. It will link to the Superstream with ST fiber.

For outputs it will have nothing but the finest. 3 different I2S modes ( LVDS/HDMI (PS Audio pinout), CMOS over RJ-45, and Superlink). It will also have an AES/EBU digital output for legacy DAC support of the highest quality. The AES/EBU output will be on a modular board that can be substituted with ST fiber/word clock out for DAC's such as EMM labs and Playback designs.

What is Superlink? It's a special connection that connects to Ravenna retrofit boards. These Retrofit boards can be installed in any DAC with a removable USB interface to bring the pure Ravenna I2S into the unit in the best way possible. Max resolution support from the I2S and Superlink outputs will be PCM 24/384 and DSD 512. For example the Amanero USB boards found in all of the Lampizator DAC's would be perfect for the upgrade.10 minute job max to install the board in place of the Amanero.
The Ravenna Pro I/O box will also have a choice of ultra low jitter clocks from the highly praised Crystek 957, to the incomparable NDK DuCULoN clock:
​​
When the Superlink option is used, the master clock will be located on the retrofit board so the DAC chip can be slaved to it for the lowest jitter possible. Imagine the famous Lampizator Golden Gate using the Crystek 957, or even the NDK DuCULoN as the master clock rather than the clock built on the Amanero USB interface! Wow!

The Superstream Pro will run an AES67 VSC, so it will be able to talk to all AES67 compliant devices from Dante and Ravenna. This includes for example DAC's such as the Merging NADAC, active speakers from Genelec, and AES67 enabled amps.

Here's a list of all of the possible ways the Superstream Pro will be able to interface to DAC's, active speakers and AES67 enabled amps:
1: USB
2: I2S over CMOS (RJ-45)
3: I2S over HDMI
4: AES/EBU
5: COAXIAL SPDIF (With AES/EBU to SPDIF adapter)
6: ST fiber/Word clock (Optional in place of AES/EBU)
7: Superlink boards
8: Roon RAAT via Ethernet (Any Roonready device)
9: Dante via Ethernet
10: Ravenna via Ethernet