USB To SPDIF Converter

AC Adapter


in stock, ships 1-3 days






“Why would I need a USB to SPDIF converter?” you might ask. Well, maybe you don’t. Maybe you’re already using our Gen 5 USB input. But if you aren’t, this is a great way to convert virtually any computer, tablet, streamer, or phone into a dedicated, high-performance audio source.

Works with Virtually Any Audio USB Source and DAC 
Just connect your USB source to Eitr’s USB input, and connect Eitr’s coaxial SPDIF output to any DAC that accepts coaxial input. Now, you have complete isolation from source to DAC, together with a superb, low-jitter coaxial SPDIF interface for bit depths and sample rates up to 24/192.
USB, Solved: Gen 5 Technology
The Eitr features the same unique Gen 5 USB input technology as in our upgradable DACs. It’s simply the highest-performance USB input available today, with complete electrostatic and electromagnetic isolation (via transformers), self-power of all critical low-noise and reclocking sections, and separate, precision clock sources for both 44.1 and 48kHz multiples. (And if you don’t understand the technobabble, here’s the point: it works great and sounds great, too.)
Linear, Low-Noise Power Supply—Built In
You won't need any "linear supplies" or other "add-ons" to improve Eitr—like all of our stackable products, we've built in a linear supply with multiple stages of ultra-low-noise voltage regulators. From the included 1.5A, 6VAC wall-wart to the output, there are no switching supplies in Eitr.
Designed and Assembled in USA
By “designed and assembled in USA" this is what we mean: the vast majority of the total production cost of Eitr—chassis, boards, transformers, assembly, etc—goes to US companies manufacturing in the US. Our chassis are made minutes from our facility. Our PCBs are done just over the hill from us, or done in NorCal. Yes, the wall-warts are made in China, but there's some give and take at this price point. 
2-Year Warranty, 15-Day Return
Eitr is covered by a limited warranty that covers parts and labor for 2 years. If you don’t like your Eitr, you can send it back for a refund, minus 15% restocking fee, within 15 days of receiving it.

USB Input: 1 in (Type B) 
USB Mode: USB 2.0 (480Mbps), compatible with USB 3/3.1 ports 
USB Receiver: C-Media CM6631A
USB Isolation: Electromagnetic and electrostatic isolation via high-speed transformers
Clocks: separate crystal clocks for both 44.1kHz and 48kHz multiples
SPDIF Output: 1 coaxial (RCA) output
Power Supply Type: linear, with precision low-noise voltage regulators
AC Power: 9VA 6VAC wall-wart
Power Consumption: 2.5W typical
Size: 5 x 3.5 x 1.25”
Weight: 1 lb

Why would I need a USB to SPDIF converter? 
You may not need one at all. We’re not saying you are. If you’re already using our Gen 5 USB input, then you probably don’t need Eitr. But if you have a DAC without Gen 5, and you want to use your computer (or tablet, etc) as a high-performance audio source, then you might really like to have a USB to SPDIF converter.

What does this thing do exactly?
It converts USB audio to SPDIF (Sony/Philips Digital Interface Format), which is a dedicated digital audio format, and passes it along to your DAC by way of a coaxial output.
Only a coaxial output? 
What the hell? What if I want optical?
If you want a crappy optical output that has jitter problems like no tomorrow and likely cannot do 24/192 reliably, you’re free to find a different USB to SPDIF converter that offers optical output.
But, freedom of choice and all that!
Yes, and we chose freely to not offer optical, because it’s not the greatest digital interface.
So does this replace the Wyrd?
No. Wyrd is a different product, used if you have noise or USB connection problems on USB inputs before Gen 5. You won’t need it with Eitr, since it’s electromagnetically and electrostatically isolated. Wyrd still solves problems on other DACs, though, so we’re continuing to offer it.
Gimme some technical details, please?
Eitr does three things:
  1. It offers electromagnetic and electrostatic isolation from the USB source via a unique transformer-coupling method. This, we’ve found, is superior to optocouplers, which are inherently high-jitter devices.
  2. It eliminates any connection between the USB power and ground and system power—Eitr's low-noise and reclocking sections are completely self-powered.
  3. It provides much higher quality, independent crystal-based clocks for the USB input and SPDIF output, operating at both 44.1 and 48kHz multiples.
What if I want a super-duper linear power supply to really turn this thing up to 11?
Cool. We've already included it.
No, I mean a really, really expensive linear power supply with all the fancy stuff on it!
Yeah. Gotcha covered. Ultra-low-noise voltage regulation and exotic aluminum organic polymer caps are already built in.
No, I want a power supply I can bend a shelf with! I want something external that is really over the top!
You know there are these things called "cars," and cars typically come with many options. Sometimes you can even double the price of the car by adding options! Maybe you should consider a car. 
Okay. I give up. But are you saying I need to get this thing if I have a DAC without your Gen 5 USB input?
Nope, not at all. Most USB outputs work fine with all of our DACs, no matter they have Gen 5 or not. This is simply another option that offers total isolation from the source.

So what platforms does your USB input support?
Actually, the question should be “What platforms support your USB input?” since our USB input is 100% UAC2 compliant (that is, USB Audio Class 2, the accepted standard for USB audio transmission.) So, here you go:

  • Windows 7, 8, and 10. Windows 10 is highly recommended. It is usually plug and play with our DACs. Sometimes you have to install drivers, which are available at schiit.com/drivers. Windows XP, Vista, and Windows Server editions are all untested and are not recommended.
  • Mac OSX. From 10.7 on up, Macs have been plug and play with our DACs. Sometimes you’ll run into power management problems that will require you to turn off App Nap.
  • iOS. From iOS7 on up, iOS devices have been able to interface with our DACs using a USB Camera Connection Kit, Lightning to USB Camera Adapter, or Lightning to USB3 Camera Adapter. You may have to use a hub to avoid a “Draws too much power” error.
  • Android. Most Android devices that shipped with Android M or above will interface with our DACs using a USB OTG cable. Some may require separate player software, like USB Audio Player Pro. 
  • Linux. Most Linux distros that support UAC2 natively will be plug and play with our DACs. Please note that we cannot provide detailed technical support for Linux. 
What the hell is “Eitr,” anyway? 
In Norse mythology, Eitr is a substance that is the origin of all living things. You know, like music. Or something like that. 
You’re really reaching with that connection to audio, you know?
Would you rather we call it “TX-RX-100a” or something meaningless like that? Let us have a little fun. It keeps us sane. Well, relatively.
How do you pronounce “Eitr?” 
Like “eater.” Yep. There you go. Or there we go.
Schiit Eitr Preview Commentary
Torq, Zerodeefex, AtomicBob

Torq says:

"If you’ve been looking for an alternative to your existing USB-to-DAC connection, the TL;DR version of my thoughts here is simple:

Buy the USB Gen 5.0 board if you have an upgradeable Schiit DAC; if not buy an Eitr - then call it good and move on.‚Äč

Compared to their respective USB input options, and to Schiit DACs with the USB Gen 2 and 3 boards, the raw character of the DACs doesn’t really change here, but there’s a discernible improvement in resolution/detail, and in the case of Bifrost MB, Gungnir MB and Spring DAC a blacker background. And, in all cases, protracted listening sessions generally left me with a sense that the overall presentation was smoother and easier to lose myself in and any sense of "edginess" to the music was gone.

I found it to be a very worthwhile improvement, and the degree of improvement was higher from computer based sources than from other devices with USB outputs. Definitely worth the asking price in all the scenarios I tried, and a much better deal than any of the alternatives I've tried."


Zerodeefex says:

"Short summary:

  • Way better than the USB in my Gumby already
  • Way better than the USB in my Gumby + Wyrd alreadhy
  • Way better than any USB decrapifier or SPDIF converter I've used so far
  • Not as good as the Lynx/my Theta Data III to the coax input of the Gumby but I haven't heard anything that is.

What's better? It's much cleaner than the USB output of the Gumby (I don't have the Gen5 yet). Instrument separation is better, resolution is generally improved and noise rejection out of a known noisy crappy laptop is much improved. That laptop has had trouble with pops and drop outs with almost every USB DAC I've ever used and with the Eitr it's rock solid.

What's not better? Tonality is not changed. I don't think bass slam is changed (but Marv might disagree with me here).

In short, it's a damn good price for a significant upgrade."


AtomicBob says:

"My measurement queue overflows but I thought I would toss this in for a quick peek.


  • Dell E7470 laptop with USB3 only
  • dScope soundcard output to Schiit Eitr via WDM driver
  • Vaunix Lab Brick USB Hub
  • Audioquest Forest USB cable
  • Schiit Eitr input to dScope via spdif
  • Tecnec 75 ohm BNC cable and Tecnec BNC to RCA adapter
  • 44.1 KHz, 24 bit

Noise floor with -40 dBFS 1 KHz sine is below -175 dBFS !!!!"



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