Schiit YGGDRASIL SCH-10 User manual

AUDIO EQUIPMENT
ITEM
FOR
MODEL NO
OWNER’S MANUAL
SCH-10
CLOSED-FORM MULTI-BIT BALANCED DACDESCRIPTION
NOTES
REVISION ARANDOM NUMBER 000000001
IN NORSE MYTHOLOGY, YGGDRASIL IS THE WORLD TREE.
THE SOURCE OF ALL THINGS.
IT’S ALSO PRETTY MUCH UNPRONOUNCEABLE.
WHICH IS WHY WE CALL THIS DAC “YGGY.”
IT’S THE BEST DAC WE KNOW HOW TO BUILD...
WELL, WITHOUT A SECOND MORTGAGE AND 50 AMP POWER RUNS.
YGGDRASIL

ITEM SAFETY INSTRUCTIONS
The following is required by the roughly 9,542 government agencies and regulations we have to comply with. If you have some
common sense, they should seem pretty straightforward. In any case, read these instructions before proceeding farther, follow all
instructions, and heed all warnings. Or else!
1. If you don’t know how to install audio devices, get a qualied professional to help.
2. Never use this device near water, and clean only with a dry cloth.
3. Assure adequate ventilation, do not block any ventilation openings, or place near heat sources.
4. Use only the supplied power cord or suitable replacement. Route cords away from trafc areas and protect them from being pinched.
Unplug the cord from the outlet if the apparatus is unused for a long period of time.
5. To prevent electric shock, do not use the plug with an extension cord, receptacle, or outlet unless blades can be fully inserted.
6. Refer all servicing to qualied service personnel. Service is required when the device has been damaged, including cord or plug damage,
liquid has been spilled or objects have fallen into the device, the device has been exposed to rain or moisture, does not operate normally, or
has been dropped.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS DEVICE TO RAIN OR MOISTURE.
Application for Council Directives 72/23/EEC, 89/336 EEC
Conformity declared for EN60065, EN55022 Class B, EN50082-1

Yggdrasil is the ultimate DAC—for Schiit, and maybe
for anyone. Compare it to anything, at any price.
Yggdrasil is the culmination of 5 years of research that
started with 1917 Western Electric papers on Pulse
Code Modulation, continued with a professor emeritus
of mathematics to solve a divide-by-zero problem,
followed by a RAND Corp mathemetician to devise
the code, and completed with a team consisting of
the “father of the DAC,” Mike Moffat, and exceptional
digital, rmware, and analog engineers.
It is the antithesis of noise-shaping technologies like
DSD, preserving all the original PCM samples from
input, through clock reconstruction at the original
sample rate, the digital lter, to true multibit DACs
suitable for medical and military technology. It is an
extension of multibit technology that deviated into
noise-shaped solutions 20 years ago. It is unlike any
other DAC in the world. Enjoy.
ONE Yggdrasil Bitperfect DAC
ONE Power cord (for, like, well duh)
ZERO Stick-on feet (because Yggy already has screw-in
feet—you’ve reached the big leagues now, guys)
ZERO Crystals, cryo-nano-dampers, alien wave absorbers,
or any other magical parts
In case you missed it, Yggdrasil does not decode DSD:
1. Like we said, this is the antithesis of noise-shaping technologies
like DSD. Antithesis = the utter opposite.
2. We chose to optimize Yggdrasil for the 99.99% of music out there
that is available in PCM format, rather than the tiny percentage of
DSD les. We’d rather make the most out of what we have, than bet
that the entire recording chain can be overturned. If this is not your
philosophy, we understand completely.
3. If you’d like to listen to your DSD les, you can convert them to
PCM with most popular players. This is exactly the same as what
happens in most popular DAC chips, but at much higher quality.
WELCOME
WHAT’S IN THE BOX
IMPORTANT

YGGDRASIL CONNECTIONS
B
USB
COAX BNC
AES/EBU
OPTICAL
SCH10Y
000001
115VAC 45W
much of the balanced
“magic” of the
Yggdrasil. Connect
with good RCA cables.
1 Single-Ended
Output.
If you don’t have
balanced gear, we’ve
provided two sets of
summed single-ended
outputs that preserve
2 Balanced Output.
These are the
balanced outputs for
Yggdrasil—straight
from the DAC with
only discrete JFET
buffers. Connect these
to your balanced gear
with good XLR cables.
12
3
4
5
3 USB Input.
This is a USB digital
input. Connect to your
computer source with
a short (2m or less),
USB 2.0-rated cable.
ITEM
67
8
9
4 Toslink Input.
This is a standard
optical input, as used
on CD players, Apple
TVs, and many other
devices. Connect with
a short (3m or less)
optical cable.

7 AES/EBU Input.
This is a balanced
AES/EBU input for
connecting to sources
with an AES/EBU
output. Use a high-
quality XLR cable for
this input.
8 Power Switch.
Up for on, down for
off. Very simple.
There are no fancy
“power down” modes
with Yggdrasil, just
on or off.
9 Power Cord.
Plug the end of the
supplied IEC cord in
here. You can also use
fancy audiophile types,
but they won’t really
do anything—what
about the thousands
of feet of crap copper
cables in your walls,
huh?
5 Coax Input.
This is a coaxial
digital input. Connect
it to any coaxial-
output source with a
high-quality 75 ohm
coaxial cable.
6 BNC Input.
This is a coax input
that maintains the 75
ohm characteristic
input impedance
through the connec-
tor. Use a good, 75
ohm coaxial cable to
connect to a BNC
source.
You’ll need to download the Schiit USB
drivers at schiit.com/drivers if you’re
using Windows. For Mac, no drivers are
needed. For Linux, no drivers are necessary
for distros supporting USB Audio Class 2.
USB is great for audio. Try it, you’ll like it.
Just a couple of notes, though, to improve
your experience.
1. You’d be amazed how many audiophile
USB cables are really, really bad—and don’t
conform to USB 2.0 specications. If you’re
having glitches, weird noises, and other
bizarre problems, swap the cable for
something that’s really USB 2.0 rated.
2. USB cables don’t like to be super long.
Stick to 2M or less. For Americans, that’s
about 7 feet.
3. USB does sometimes have problems
with port power management. This isn’t
our fault. Blame the manufacturers...and
consider adding a Wyrd. More info at
schiit.com/faq/usb-problems.
NOTE

ITEM YGGDRASIL CONTROLS
Fun fact: some people
say that the vast
majority of CDs were
recorded in inverted
phase. We don’t
comment on that, just
stating an opinion
we found online. You
know, like we all do
from time to time.
1 Phase Invert
Button.
Press this button to
invert the absolute
phase. This can be
helpful for some
recordings that do
not maintain
absolute phase.
2 Phase Invert
Indicator.
When this is lit, the
absolute phase is
inverted.
24/192, so the 8X
lights will never be lit.
However, the product
is upgradable, so
maybe in the future!
12456
3
3 Sample Rate
Indicators.
These indicate what
format is coming in to
Yggy—44.1K or 48K,
plus the multiple
(1, 2, 4, or 8X.) As
of right now, Yggy
accepts inputs up to

4 Input Select.
Push this button to
walk through the
inputs: USB, AES/EBU,
BNC, Coax, Toslink.
Pretty simple, right?
5 Input Indicators.
These show what
input you’ve selected.
Hopefully it doesn’t
show more than one. If
it does, you may want
to put down the drink
for a while.
5 VCO/VCXO
Indicator.
Also known as the
“buy better gear” light.
If this is illuminated,
the Yggdrasil’s input
clock regeneration
(Adapticlock) is
in VCO mode, or
lower-quality mode.
This means your
source does not
provide a good center
frequency, or jitter is
too high for the
better VCXO mode
to operate.
We recommend leaving Yggdrasil on continuously
for best performance.
Seriously. No kidding.
Yes, we know, this sounds like hoo-ha about “burn-in” and magick
discs/stones/markers/etc. But in Yggy’s case, this is a real thing,
and a serious recommendation.
Why? Because the mil-spec D/A converters in Yggy really do
operate best once they’re up to temperature. As with a lot of other
components inside the box. So, the logical solution (at a power cost
of $50-100 per year, depending on where you live) is simply to turn
it on, and leave it on. This is facilitated by inconveniently placing the
power switch in the rear.
So what will you hear as Yggy warms up? Hell, we’re not going to
speculate on what you hear...but we’re sure you’ll hear impressions
from plenty of reviewers, and you can listen for yourself, and make
your own decisions.
Sooooo...turn it on, leave it on, and see if you can’t hear a difference
after it’s been on for a few days.
And yes, this applies to rst turn-on, too.
IMPORTANT

ITEM FAQ
Can I run both the single-ended and balanced outputs at the same
time?
Yes, you can.
How should I set the input bit depth and sample rate?
Set it to the native bit depth and sample rate of the music.
Yggdrasil will take care of the rest.
Should I use the phase invert, or not?
Which sounds better? Use that one.
Hey, the “buy better gear” light came on. What does that mean?
That means you have a crap source. Yggdrasil analyzes the incoming
center frequency and jitter to determine if it can use VCXO reclocking,
which requires a precise center frequency and reasonably low jitter.
If it cannot use VCXO regeneration, it switches to VCO regeneration,
which still provides orders of magnitude improvement in the
reconstructed clock. However, the source is still crap. Yes, even
if it’s a $10000 CD player you purchased 15 years ago. Those go
off-frequency all the time.
What else will trigger the buy better gear light?
Only spectacularly bad sources. Old CD players are one. Apple Airport
Express and satellite receivers are two others. The rest, including cheap
computers, usually have no problem at all.
Hey, this thing clicks when my CD player is in pause/when I select
les on my desktop/change sample rates, etc.
Right. That’s the muting relay, doing its job. When the incoming
datastream is interrupted, Yggdrasil will mute. The relay is rated for
15 million cycles, so don’t stress about it. Or buy a better transport.
Or use USB.
Can I leave Yggdrasil on all the time?
Yes, we actually recommend that.
Hey, you know this DAC runs warm?
Yep, it does.
It doesn’t turn on, what do I do?
Check the serial number sticker for the AC voltage and ensure it
conforms to the AC voltage of your country. Unlike crap switching
power supplies that auto-switch between AC voltages, we use linear
supplies for lowest possible noise, but this means they are set to a
single voltage. It needs to match your country’s AC voltage.
It’s the right voltage, and still doesn’t turn on.
Plug it in to a different AC socket. Ensure you are not currently in
a blackout. Then contact us if it still doesn’t turn on.

Inputs: AES/EBU XLR, RCA SPDIF, BNC SPDIF, Optical SPDIF, USB
Input Capability: up to 24/192 for all inputs
Input Receiver, SPDIF: AKM 4313
Input Receiver, USB: C-Media CM6632
Clock Management: Bitperfect clock management at all native
sample rates via Adapticlock analysis and VCXO/VCO regeneration,
plus asynchronous USB Gen 3 module
Digital Filter: proprietary Schiit bitperfect closed-form digital lter
implemented on Analog Devices SHARC DSP processors
D/A Conversion IC: Analog Devices AD5791 x 4 (2 per channel,
hardware balanced conguration)
Analog Stages: Fully discrete JFET buffers for balanced output
and discrete JFET summing stages for single-ended output, direct
coupled
Output: One pair XLR balanced and two pairs RCA single-ended
Output Impedance: 75 ohms
Frequency Response, Analog Stage: 20Hz-20Khz, +/-0.1dB,
0.5Hz-100KHz, -1dB
Maximum Output: 4.0V RMS (balanced), 2.0V RMS (single-ended)
ITEM SPECS
THD: Less than 0.006%, 20Hz-20KHz, at full output
IMD: <0.007%, CCIR
SNR: > 117dB, referenced to 2V RMS
Power Supply: two transformers (one for digital supplies, one
for analog supplies) plus one choke for discrete, dual mono,
shunt-regulated analog +/-24V supply, plus 12 separate local
regulated supplies for DACs and digital sections, including
high-precision, low-noise LM723 regulation in critical areas.
Upgradability: Fully modular architecture. Separate digital input
board, USB input board, DSP engine board, and DAC/analog output
boards.
Power Consumption: 40W
Size: 16 x 12” x 3.875”
Weight: 21 lbs

Schiit Audio warrants to the original purchaser that the product shall be free from defects in material and workmanship for ve (5) years from
the date of purchase. Exceptions: Tubes. Tubes are covered by a 90-day limited warranty with the same terms. If a defect covered by this
warranty occurs during this warranty period, Schiit Audio will repair the defective product, free of charge. Date of purchase will be based on
customer-submitted receipts, otherwise date of manufacturing will be used to determine warranty period.
OBTAINING WARRANTY SERVICE
If you believe you need warranty service, contact us rst. There may be a simple solution to your problem. Schiit Audio products sent back to us
without a Return Authorization (RA) will be returned to the sender without repair. To contact us and obtain an RA, email suppor[email protected]. We
will respond quickly to email inquiries.
WARRANTY LIMITATIONS
THIS WARRANTY SHALL NOT APPLY IF THIS PRODUCT: (a) IS MODIFIED OR TAMPERED WITH; (b) IS DAMAGED BY NEGLIGENCE, ACCIDENT,
UNREASONABLE USE, COFFEE, OR BY OTHER CAUSES UNRELATED TO DEFECTIVE MATERIALS OR WORKMANSHIP; OR (c) HAS HAD THE
SERIAL NUMBER ALTERED, DEFACED OR REMOVED.
ANY APPLICABLE IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
HEREBY LIMITED IN DURATION TO THE WARRANTY PERIOD (5 YEARS). IN NO EVENT SHALL SCHIIT AUDIO BE LIABLE FOR CONSEQUENTIAL
OR INCIDENTAL DAMAGES RESULTING FROM THE BREACH OF ANY IMPLIED OR EXPRESS WARRANTIES. SOME STATES DO NOT ALLOW
LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS OR EXCLUSION OF CONSEQUENTIAL OR INCIDENTAL DAMAGES, SO THE ABOVE
LIMITATIONS MAY NOT APPLY TO YOU.
This warranty gives you specic legal rights. You may also have other rights which vary from state to state or province to province.
Schiit Audio’s address is: Schiit Audio, 24900 Anza Drive, Suite A, Valencia, CA 91355
ITEM WARRANTY