Grimm Audio MU1 User manual

Before you start
1 The MU is a Roon C , ore and Roon Endpoint in one its main user interface is the Roon
, , . Remote App which is available for macOS Windows Android and iOS Please download the
. Roon Remote app for your device before you proceed ou need to have a subscription to
. the Roonlabs service Check out .roonlabs com .for more information and pricing
Connecting and powering up
, , For a working system you need at least a power connection a wired internet network and
. a DAC or speaker system with digital inputs The image below shows the connections on
1.the back of the MU
1 , 1 The MU is shipped with a proper mains power cable use this to connect the MU to a
. 1 90 240 .mains outlet The MU works with nominal mains voltages from V to V
, 1 5 Next connect the MU to your local network using a CAT e or higher category cable that
you attach to the Ethernet 1. 1 port of the MU The MU makes use of the DHCP server of
.your router and obtains an IP address automatically when switched on
1. 1 Then connect your DAC or active speaker to the MU If you have the Grimm Audio LS
, loudspeaker system use the propietary LS1 control out . connector If your DAC has a digital
, XLR input connect it to the AES3 out 1 . XLR connector using an XLR cable If your DAC
, does not have a digital XLR input but a digital RCA input connect that to the S/PDIF out
1 / .connector of the MU with a coaxial cable suited for S PDIF
3 1 When these connections are made you can turn on the MU by pressing the small white
Power .button on the back
2

First time setup
1 , When you turn on the MU for the first time or when you performed a Roon database
, . reset you need to set up Roon for its first time use
Select your Core and log in
Open the Roon Remote app on your
favorite device and it will ask you
. which Roon Core you like to use
1 The Roon Core in the MU is shown
’ with the last part of your unit s serial
. 1 number If the MU does not show
, up check if your Remote is
connected to the same network as
1 1 the MU and check if the MU has
. an IP address Please consult the
1 main MU software manual for
.information about how to do this
.Press the Connect button to continue
In the next screen you must log in
. using your Roonlabs credentials
If you have problems logging in or
other problems directly related to
, Roon please check out the Roonlabs
help page or ask for help on the
Roon support forums.
, For support from Grimm Audio
please contact us using the support
form . on our website
Note: Some of the next steps were preset for you in the f ctory, including ctiv tion of the
extension. In some c ses, for inst nce fter you h ve reset your Roon d t b se, you need to
follow ll these steps:

Add music
‘After logging in you will see the Add
’ . your Music page Here you can add
.your local music files to Roon
If you 1 bought an MU with internal
storage you should press the Add
folder . - , button In the pop up select
HEAP* and confirm by clicking Select
this folder.
* 13-If your serial number starts with
0.004 you add the internal storage by
selecting the sdb1 folder under mnt
after pressing the dd folder .button
In the same way you can add a
network drive such as a NAS to the
1 . MU storage More information about
how to do this can be found here on the Roonlabs website.
’ Click Continue when you are done with setting up your local music or when you don t want
.to make use of local storage
The next page allows you to connect
/ your Tidal and or Qobuz streaming
. services to Roon These are separate
. subscriptions One of the great things
of Roon is that music from these
services integrates seamlessly with
.your local music
If you do not want to make use of
these streaming services or prefer to
add them later, click the No th nks
.button
, Next you will enter the Audio
. settings page of Roon

Enable the audio device
1 . 1 Here you should set the MU as audio device Since the MU is both Roon Core and Roon
, . Endpoint the audio device is connected directly to the Roon Core
1 , To enable the MU Endpoint you
must check the Connected to Core
. category Press the Show All button
.to make the audio device visible
1 , There is only device here which
has the label Grimm Audio MU1.
Enable this device and continue by
pressing the Finish .button
ou will now enter the main page of
. Roon Press the Select n udio zone
1.button and choose the Grimm Audio MU
, .After this there is only one step left activating the extension

Activate the extension
Go to the Roon Settings menu to activate the Grimm Audio Extension ( in case it is not yet
)activated for you in the factory . 1 This extension enables track information on the MU
1. display and offers access to Roon control via the main knob of the MU If you have more
, Roon Cores in your network please make sure to activate this extension on the Roon Core
1. that is built in the MU
, To activate the extension go to the
submenu Extensions and press
En ble.
ou may press View to see the
. active extensions M ake sure there is
only one activated Grimm Audio
.Extension
1 After this step your MU is ready for
.use
GRUI web interface
1 ( “ ”) 1 The MU has a web interface the GRUI to control all of the MU settings that are not
. available from within Roon ou can connect to the web interface through the browser of
, 1.any computer tablet or smartphone that is connected to the same network as the MU
The smartest way to enter the GRUI with
your tablet or smart phone is to scan the
QR code 1, on the display of the MU in
[4/7]. , -menu To enter the menu press hold
.the main knob until the first menu appears
Release the button and turn it right until
. the fourth menu page is visible Scan the
. QR code with your device To exit the
, - .menu press hold the main knob again
Alternatively you can enter the url link
shown at the bottom of the QR page into
. your browser If your router and remote
, device support it you may also visit the
GRUI by using the hostname instead of the
. IP address The hostname can be found at
[2/7], . the bottom of menu it consists of a part of the serial number of your unit Some
“ ://” , “ :// 1-00 ”. browsers require you to add the prefix http to the hostname as in http mu xxxxx
1 Please read the main MU software manual for more information about the functionality of
. the GRUI web interface ou can find the latest version of this manual under the downloads
1 tab of the MU page on our website.
Stand-by

1 To put your MU in - , , - stand by so it consumes less energy while not in use press hold the
. main knob until the first menu appears A short press on the main knob will now bring it
- . into stand by mode To wake u 1 , .p the MU again just turn or press the main knob
Updates
1 . , The software of the MU is under constant development Bugs are fixed improvements are
. 1 .made and new features are added Please keep your MU updated to the latest version
. When there is an update available it is notified through our newsletter ou can sign up for
the newsletter via the footer of every page in our website. An update notification will also
1 .appear on the main menu of the MU display and in the GRUI
1. Updates are installed via the settings menu of the MU , To enter the menu press the main
. knob until the first menu appears Release the button and turn it right until you entered
the update [6/7]. menu If you see that an update is available you can start the update
, . process by pressing the main button twice once to start and once to confirm Please note
that the screen may freeze and even turn completely white for a long time during an
. 15 . update Depending on the update this may take up to minutes Do not unplug the unit
. , from the mains while it is updating If anything seems to go wrong during the update
please contact Grimm Audio support through the support form and we will help you out
.quickly
1.1 Version v 05/05/23 © Grimm Audio