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Related Manuals for Grimm Audio MU2
Summary of Contents for Grimm Audio MU2
- Page 1 MU2 Software Manual, to be read next to the MU2 Hardware Manual Please read this manual before operating the unit! For firmware version v0.9.5...
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Page 2: Table Of Contents
1 Introduction............................3 Scope................................3 User Interface description...........................4 Support mode..............................5 2 Roon Labs setup...........................6 Extension to enable track information on the MU2 display.................6 Volume limit settings...........................7 Device Setup..............................7 Background analysis speed..........................9 Updates of Roon software.........................10 Known issues with Roon on the MU2......................10 USB storage..............................11... -
Page 3: Introduction
Scope In this manual you will find all information related to the software of your MU2. Since this software is regularly updated, we decided to offer this MU2 software manual as download only. Your MU2 was shipped with a printed MU2 hardware manual. Please read it carefully for your own safety. -
Page 4: User Interface Description
The MU2 has 3 main user interface parts, the main knob on the top, the display on the front and the MU2 activity LED in the ‘i’ of the Grimm logo on the front. On the back are the connections and the power button, please read the hardware manual for more information. -
Page 5: Support Mode
When the system is booting, the display will show an animation. Support mode The MU2 has a support mode feature, via this mode Grimm Audio staff is able to connect to your MU2 via the internet to check and if possible resolve software issues with your device. -
Page 6: Roon Labs Setup
Roon is a capable multi room system. If you like, you can also use the Roon Server in the MU2 to stream music to other Roon Endpoints in your network (for instance a system in the bedroom). -
Page 7: Volume Limit Settings
The extension will contain a part of the serial number as shown in the image below. Volume control of the analog outputs should now work via both the Roon app and the MU2 main control. Additionally you will see information about the currently playing track in the display and a progress bar of the running track. - Page 8 By clicking Device setup you get the following window: In Device Setup it is recommended to keep the default settings, if you have problems you might want to press the ‘Load defaults’ button in the top right corner. You can change settings here but some settings will give problems, like changing ‘Volume control’.
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Page 9: Background Analysis Speed
‘unfolds’ will be performed by Roon and in ‘No MQA support’ mode Roon will not add the MQA metadata into the audio. ‘Resync Delay’ is default at 0 ms (since the MU2 is clock master). In the ‘Advanced’ part of the Device setup window (click “Show advanced”) you can check whether the max sample rate (PCM) is set to “up to 384kHz”... -
Page 10: Updates Of Roon Software
100% gapless by design, which means that a soft glitch can be heard at the start of a new track. This glitch is in the master files and cannot be solved in the MU2 or Roon software. Also, a short moment after playback of a DSD file has stopped, Roon will switch to a ‘silent’... -
Page 11: Usb Storage
USB storage On the back of the MU2 is one USB port which may be used for connecting an external USB drive (flash drive, SSD or HDD) extending the disk space of the MU2 system. You may play music files from this drive. The MU2 supports the following file systems: FAT32, FAT16, NTFS, HFS+, exFAT, EXT2 and EXT4. -
Page 12: Network Storage
Depending on your router settings it is possible that the hostname of your NAS is not resolved in the network. When this is the case you can make use of the MU2’s name resolve client by .local adding to the hostname of your NAS as is shown below. - Page 13 This is because “mDNS” is not natively supported by Windows. However, on many Windows computers software has been installed that added support for this protocol and therefore we advice to first try using the hostname. If this does not work, use the MU2 IP address.
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Page 14: How To Add The Internal Storage To Roon
Note: On the internal disk you will find a directory lost+found, you can ignore this folder. Tip: After mounting you can make a backup of music that is stored on the MU2 internal drive via your Windows or Mac computer by using your favorite backup application. - Page 15 “roondata” instead of “music”. In case you need to ‘reset’ the Roon database to solve a problem, the MU2 (GRUI) web interface offers a convenient ‘Roon database reset’ button. This button should be used with care, and only after a Roon Labs or Grimm Audio support engineer instructs you to use it.
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Page 16: Main Knob Control
• A short press is shorter than 2 seconds, a long press is longer than 2 seconds. Below is an image of the screen you get when the MU2 is fully booted but still waiting on Roon to start up. - Page 17 Extension to enable track information on the MU2 display. During start-up, the MU2 waits for a network connection, it may take a few minutes before the MU2 is given a local IP address by the router. Until this happens you will see “No Network Connection” on the display.
- Page 18 When a Roon remote such as a tablet is connected to the MU2 Roon Server and music is playing, the track information and progress bar is shown as in the image below. In Music View, the display offers the following information: Sample rate and format •...
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Page 19: Source Selection
When turning the MU2 main control knob, the volume changes and the track progress bar at the bottom is temporarily replaced by a bar that indicates the current volume setting. You will hear the relays of the analog volume control clicking inside the MU2 box when you change the volume. - Page 20 Note that the output is muted when changing source selection. Mark that the MU2 shows the sample rate of digital inputs in the top left corner when there is a signal lock. “No Signal” will be shown if there is no signal detected.
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Page 21: Menu View
A short press (‘confirm’) will put the MU2 in stand-by mode. • ◦ When the MU2 is in stand-by you can simply press or turn the main control knob to initiate start-up of the system. With a long press you will exit the menu and go back to the Music View. - Page 22 MU2. If the IP address shows ‘unknown’, there is no network connection and in that case the MU2 cannot be found by the Roon App in your tablet or smart phone. In that case, please check the network connection of your MU2.
- Page 23 • LED and Display: The brightness of the LED or Display on the front of the MU2 can be set with this option. For the LED this influences the brightness both in operation and in stand-by mode. Turn the main knob clockwise to increase the brightness and counter-clockwise to decrease the brightness.
- Page 24 Please see the hardware manual for the connector location and pinout information. The MU2 supports the following types of IR remotes: RC5, RC6, JVC, NEC, NEC extended, Apple and SIRC. Other protocols may be added in the future, please contact info@grimmaudio.com...
- Page 25 To cancel and leave the menu, apply a long press. One button of the infrared remote can only be paired with one function of the MU2. If you use the same button of your remote for another function, the previous function is overwritten and the new one is paired.
- Page 26 [5/7]. If the MU2 is checking for updates, this is shown at the bottom of this menu. If your software is up to date this is indicated in the display and the bottom left icon is greyed out.
- Page 27 With a long press you will exit the menu and go back to the Music View. • The MU2 does a hardware self-test prior to starting the update. In case something is wrong the text “contact support!” is shown in red.
- Page 28 When you activated Support Mode and wish to return to normal mode, press the power button on the back of the MU2 to turn off the device, and press the power button again to boot the MU2 in normal mode. After rebooting, Grimm Audio has no access to your MU2 any...
- Page 29 With a long press you will exit the menu and go back to the Music View. • Note: While the MU2 is in Support mode, the blue dot animation will keep running and no other information is shown. Support mode privacy statement: Support Mode reboots the MU2 and establishes a secure connection to a Grimm Audio server.
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Page 30: Grui Mu2 Web Control
You'll be able to enter a name for the shortcut and then it will be added to your home screen. Note that if the MU2 receives a different IP address from your router, the url link in this stored ‘app’ does not work any more. In that case it does not connect. Please use the QR code again to establish a new connection. -
Page 31: Main Page
Main page The main page of the GRUI offers access to all basic functions of the MU2. The image below shows how it looks in a desktop environment. On mobile devices the volume control bar and source buttons will be placed below the artist play/pause buttons. -
Page 32: Mu2 Settings
The cogwheel button in the top right offer access to the MU2 settings. MU2 settings The MU2 settings page looks like this: Appearance The Power LED brightness and Display brightness can be set here. When enabling ‘Display Auto Dim’, the display will go to a very low brightness after a few seconds. Whenever you use the main knob or IR remote, it will light up for a few seconds again. - Page 33 Enable or disable a source: Disabling an input source removes it from the control part • of the GRUI and from the source selection menu in the MU2. Change the name of the input which appears in the control part of the GRUI and on the •...
- Page 34 Press the button of the function that you would like to program, the little dot will go to yellow and the label will fade in and out until you press a button of your remote. When the MU2 receives a command from the remote it will save the button that you pressed under that function.
- Page 35 MU2 software, please be cautious with these buttons. In case your MU2 has an internal Music disk, its free space and the total space of the disk are shown. Note that the displayed disk space will be somewhat lower than advertised as this is in “JEDEC 100B.01”...
- Page 36 The Reset Roon Database button will stop Roon and erase the complete Roon database from the MU2 and restart Roon. This will also reset your login (you will have to press the ‘select different Server’ on your Roon remote), playlists (excluding Tidal, Qobuz and KKBOX playlists), favorites, tags, storage settings, MU2 Extension and all other changes you made to Roon in your MU2.
- Page 37 © 2024, Grimm Audio BV. All rights reserved Reproduction in whole or in part is prohibited. Specifications subject to change without notice. Grimm Audio, The Netherlands General questions: info@grimmaudio.com Support questions: grimmaudio.com/support-form Tel. +31 40 213 1562 Check grimmaudio.com for news about your MU2.
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