Find our answers to questions that often come to mind when thinking about KLANG products and their integration into your setup. If you cannot find your particular question answered below, please leave us a message through our web messenger. We will get back to you as soon as possible.





Why do KLANG show files and log files have a time offset?

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KLANG uses UTC timestamps throughout to support devices with multiple time zone settings simultaneously. This explains why you see a constant time offset.

See details here to determine the offset: https://en.wikipedia.org/wiki/Coordinated_Universal_Time

Do I need a WiFi router? Which kind is best?

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You only need a WiFi router, if you want to connect KLANG:app on smartphones or tables, e.g. for personal mixing or for a monitor engineer when working on the stage. A hardwired ethernet connection is always the best choice for critical communication links, e.g. when running the DiGiCo console integration. We recommend to use a hardwired ethernet connect whenever possible, especially for laptops or computers with an ethernet port.

There are two different frequency bands for WiFi – 2.4 GHz and 5 GHz. We recommend to use dual band WiFi routers or Access Points. The 2.4 GHz band might get very busy or noisy when several mobile devices are around. The 5 GHz band tends to be the better choice. In many systems it is possible to define unique SSID to the 2.4 and 5 GHz bands, so it is easy to see on a mobile device on which band you are working on. Modern mesh routers are more intelligent and tend to provide the best performance in all situations.

Why do I loose connection to the KLANG processor with a 10G network adaptor?

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Newer Mac computers might ship with a fast 10G network adaptor. This adaptor sometimes runs into communication issues if the connected device (e.g. a network switch) does not support 10G. In that case a significated percentage (e.g. up to 50%) of the network traffic might be dropped, but it is hard to troubleshoot as it still works from time to time. This issue has not been addressed properly by the manufactured of these computers, yet.

Solution: Use a USB Gigabit network interface.

What kind of network switches work with Dante?

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Generally, managed switches with deactivated EEE are preferred for Dante networks.

Follow this guide to find the features you need.

How does Dante Follow / AutoConnect work?

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KLANG:kontroller can be configured to automatically patch Dante to the mix output of a KLANG processor.


Follow these steps to setup Dante Follow.

What operating systems are supported for KLANG:app?

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Officially supported operating systems for KLANG:app are Windows, Mac Os, Android, iOS.

Windows 7 and 10 32-bit and 64-bit are supported.

Mac OS X 10.11–13.0 are supported.

iOS – latest two versions are tested and supported.

Android – there are various different versions, which cannot be all tested in combination with different hardware of tablets and smartphones.

OxygenOS (OnePlus) might not work properly, this is officially not supported.

Windows Phones are not supported.


Error Code 5 with webroot on Windows

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This is a known issue with webroot.

Solution: get in touch with your system admin to disable webroot.

What does a yellow or orange “M” and red “S” in FADERS mean?

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If any channel in a mix is on solo, a red icon with “S” for solo appears  just above the FADERS menu icon.

If any channel in the mix is muted a yellow or orange icon with “M” appears.

How disable and enable the built-in demo mode feature

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It is possible to generally disable demo mode. This is particularly useful to prevent the demo mode button to appear in case KLANG:apps are disconnected from KLANG hardware network. Users might click the button accidentally and not notice that they are now mixing the built-in demo song instead of their own in-ear mix.

To disable, go to ADMIN mode and log in to a KLANG:fabrik/KLANG:vier mix or the built in demo mode. Then, navigate to CONFIG > INFO > Set (button) > Advanced > DON’T show demo mode. Fully restart KLANG:app. Now the demo mode will not be listed in the CONNECT screen anymore.

To enable again, go to ADMIN mode and navigate to CONFIG > CONNECT. Press and hold the refresh ICON (circular arrow at the bottom) for 4 seconds.

Does KLANG:app support multi-touch?

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On iOS and Android multi-touch is inherently supported. On Windows KLANG:app can be used with a multi-touch display, i.e. several faders and icons can be moved in parallel. However, on Mac OS X multi-touch displays are not supported as such. Hence, only a single fader or a single icon can be moved one after another.

– We are currently working on a solution for this and work around the barriers of Mac OS X –

Licensing Error on Amazon Tablet

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The Digital Rights Management (DRM) is sometimes causing an issue on Amazon Tablets. The tablet need to be connected to the internet from time to time to renew this license. DRM might be deactivated in future KLANG:app releases for the Amazon AppStore. To workaround, please connect the tables to the internet at least once every month.


How can I update DMI expansion cards?

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Login with KLANG:app to your :konductor. Go to CONFIG > INFO > SET > Update DMI cards.

The DMI card firmwares are included in the KLANG Operating System (KOS). A KOS Update might offer new firmwares, but they will never be installed automatically. Head to CONFIG > INFO to check if a new firmware is available for your DMI cards.

Here is a more detailed guide.

Which DMI expansion cards are supported in :konductor

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The KLANG Operating System (KOS) on :konductor officially supports the following DMI expansion cards:

  • DMI-DANTE64@96


Learn more about the supported DMI cards.


In which slot of an OrangeBox can DMI-KLANG be installed?

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DMI-KLANG can only be installed in slot 2 of a DiGiCo OrangeBox. Slot 1 is always the clock master, and since DMI-KLANG does not provide an audio clock, it has be in the second slot and get its clock from an audio IO card in slot 1.

Which DiGiCo consoles are compatible with DMI-KLANG

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DMI-KLANG can be installed in the DMI slots of the following DiGiCo consoles:

  • Quantum 7
  • Quantum 5
  • Quantum 338
  • Quantum 225
  • SD12
  • S21, S31

Immersive Processor

How many :apps can be connected to KLANG immersive processors?

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Our products are designed and tested to be used with at least 1 :app or :kontroller per mix, plus 2 :apps for engineers. In most cases is is possible to use even more apps, there is no fixed limit.

How many KLANG devices can be connected?

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Depending on your input channel requirements and the number of mixes required, more than one KLANG device can be connected to the same control network. Input channels arriving on KLANG:fabrik e.g. via MADI, can be routed to other KLANG:fabrik’s and KLANG:vier (48kHz only). Dante input channels can be routed to as many receiving devices as needed. Depending on the network load Dante Multicast flows have to be used and managed switches with proper IGMP snooping and QoS configuration should be used.

Most KLANG immersive processors can be configured to work in a cascade of units.

There is no limit other than your network limitiation as to how many KLANG:fabrik and KLANG:vier can be added to your network. KLANG:app will show each KLANG device available on your network.

How can I store and recall presets?

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Presets are by default stored inside the immersive processor hardware and can be recalled directly via KLANG:app. In order to backup presets or transfer them from one KLANG device to another, simply connect with KLANG:app go to the CONFIG > PRESET page, select a preset from the dropdown and click TRANSFER. Presets are interchangable between different immersive processors e.g. between KLANG:fabrik and KLANG:konductor.

More info on Preset…

How can I listen or CUE into mixes?

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All KLANG immersive processors allow for CUEing into all available mixes. This is particularly helpful for monitor engineers that need to constantly switch between mixes. Details on the CUE functionality can be found here.

Which Sampling Rates are supported?

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KLANG:vier can receive (Dante and ADAT comp.) and transmit (Dante) audio with 44.1 and 48kHz.

KLANG:fabrik can receive and transmit digitial audio (Dante, MADI, ADAT comp.) with single speed sampling rages 44.1/48kHz and double speed sampling rates 88.2/96kHz. At double speed, ADAT comp. inputs and outputs use SMUX format. MADI input can receive 28/32channel with high frame rate and SMUX. Transmit is always high frame rate with 32 channels.

KLANG:quelle can receive Dante audio with 44.1/48kHz, 88.2/96kHz and 176.4/192kHz.

KLANG:vokal, DMI-KLANG and :kontroller and :konductor can work with 48kHz and 96kHz and offer the exact same channel count / mix count with both sample rates.


What is a mix or an output? Is it mono or stereo?

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A mix (or :output as labelled on the back of e.g. KLANG:fabrik) always refers stereo pair of output channels. In order for the 3D processing to work the connection between our immersive KLANG in-ear mixing processor and the in-ears / headphones has to be stereo as well.

Which DiGiCo consoles offer the KLANG console integration

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The KLANG console integration is available on the following DiGiCo consoles

  • SD series
  • Quantum series

Do I need a control computer for the DiGiCo console link?

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Yes. The KLANG DiGiCo Console Link requires a computer running KLANG:app for setup and for operation.

Do I need special headphones or in-ears to experience 3D sound?

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No. KLANG incorporates binaural technology and processes the sound inside a KLANG processor to work with your own pair of standard stereo headphones or in-ears. In fact, it is not important if your headphones are open or closed, electrostatic, dynamic or use balanced armature drivers as most in-ears do. You can use universal fit in-ears or custom molded in-ears. Just make sure that the polarity is correct and the left and right signals go to the correct ears.

Is it Personal Monitoring System or is it a tool for Monitor Engineers?

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The KLANG system is designed to be very easy to use especially if you don’t have years of experience in mixing monitors. The 3D in-ear mixing functionality enables musicians to get a very transparent and natural in-ear / headphone mix and a very short time.

At the same time, our products and especially KLANG:app offers all features experienced sound engineers or monitor engineers expect when working with a mixing tool for the live or studio market. Especially features like CUE mixing for musicians is a feature you want to use at mixing monitors constantly.

Why are all other groups turned down if I increase the volume of one group?

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KLANG:app and KLANG:kontroller offer customizable DCA groups for an improved mixing workflow e.g. during a show. By default, the volume of all other groups is decreased when the volume of one group is increased. This helps to keep the sound pressure level approximately the same and prevent the mix to get louder.

However, if you want to deactivate relative DCA group mixing go to KLANG:app > CONFIG (requires Admin mode to change this setting) > INFO > SET > Disable KLANG:app Relative Group Mixing

In order to change the behavior for KLANG:kontroller login with KLANG:app to your KLANG:kontroller (requires Admin mode to change this setting) > INFO > SET > Disable Relative Group Mixing.

What do the red or green icons above CONFIG stand for?

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From left to right.

“C” stands for Clock

  • green: clock sync is OK.
  • red: there is a clock error

Change and monitor clock settings in CONFIG > ROUTING.

“N” stands for Network

  • green: Connection and ping time to KLANG processor OK
  • orange/yellow: some pings did not come through or the ping time is very long > Network problems or processor overload
  • red: connection to KLANG processor lost or communication too slow > check network settings and processor.

Take a look at CONFIG > INFO more details.


“D” indicator (DiGiCo console is Init Master) /
“K” (KLANG is Init Master) indicator above CONFIG /
“T” (Throttling is active) network messages are currently slowed down as there is a lot going on.

  • <No indicator>: Mixing Console Link Mode is set to OFF
  • Blinking Green: Mixing Console Link Mode is set to Setup
  • Static: Mixing Console Link Mode is set to Active
  • Blinking Red: Link Mode is set to Active but NO Mix or NO Channel Mappings are set.
  • RED: Console Link connection not working / lost connection
  • YELLOW: Console Link connection issues, loosing connection
  • GREEN: Console Link connection OK and working.

More info on the console integration 


How do I exchange presets between different processors?

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Presets are interchangeable between all KLANG immersive processors.

If the presets contains less input channels or less mixes these settings will be added from the default file. In case the preset has more mixes or more input channels than the processor offers the first mixes and first channels will be loaded until the maximum is reached.

More info on Preset…

What mixing consoles can be connected?

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Any digital mixing console with either ADAT / optical outputs or the Dante AoIP protocol or AES67 support or MADI BNC or Optocore.

Which Characters are allowed for Preset Names?

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Preset names shall not include blank spaces or any special characters such as  \“#@,;:<>*^|?\\/ etc.

Allowed characters are ‘a–z’, ‘A–Z’, ‘0–9’, ‘-‘, ‘.’, ‘_’

How can I connect digital audio interfaces and consoles?

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KLANG:vier offers ADAT, Dante/AES67 interfacing. KLANG:fabrik offers optionally MADI and is a versatile audio format router.

A detailed overview of further audio standards and possible converters to connect 3rd party equipment to KLANG products is shown on our blog here…

How can I update the Audinate Dante firmware?

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You will find a step by step guide in our blog here…

Can I remote control the system via MIDI or OSC?

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Yes, that is possible.

KLANG:app, all KLANG processors and :kontroller exclusively communicate with each other via OpenSoundControl (OSC) messages. Find all details about the OSC messages in the OSC Reference Guide.

KLANG:app can further be controlled via MIDI / MCU.

There are also flexible third party converters from OSC to OSC or MIDI to OSC available, such as OSCulator. In this way, mixing console commands like snapshot recall or fader comnands can be converted. Additionally, tools like touchOSC can be used to design specific graphic interfaces if required.

I only have two ears, how can sound be 3D?

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Close your eyes and listen to your ears only. You will realise that you can immediately tell from where a sound is coming from. The sound travels from the source to our ears and until it finally hits our ear drums several things happen. The first effect is most obvious. The speed of sound is limited and e.g. sound coming from your left side will arrive at your left ear earlier than on your right ear. Secondly, the sound on your right ear will be attenuated due to the head shadowing effect. Furthermore, there are more sound paths that hit your torso first and are then delayed and reflected to your ears. Additionally, all these effects are strongly frequency dependent. Your ears are used to these kind of “artifacts” and decode them as spatial information.

KLANG’s 3D in-ear mixing technology imitates exactly what would happen to e.g. instrument signals around you before it hits your ear drums. A specially processed signal arrives at your in-ear or headphones drivers and contains all spatial cues your ears need to get a full 3D impression to let you immerse into a realistic and transparent sound field.

Why is the KLANG sound so much more transparent?

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Our hearing always relies on spatial cues and is trained to listen to different directions. Once we concentrate to listen to sound coming from a specific location (hitting our ears from a certain angle) the other sounds from other directions are blended out immediately. With KLANG:fabrik and KLANG:vier this spatial cues are delivered through your in-ears and headphones and your ears can work in the same way they are used to do. This feels very natural and is not tiring for your ears. That is the reason why many musicians still feel relaxed when playing live or in the studio through KLANG’s 3D mixing.

Without KLANG? If your ears don’t find these spatial cues in your sound mix, you have to concentrate on specific timbres or sounds of instruments. What happens then, you have to think e.g. how a violin sounds like and then find the violin like sound character in a one-dimensional sound mix. This is a very challenging task for your ears and your brain. No matter how experienced you are with this, 3D in-ear mixing relieves your ears.

Can I get 3D sound without head tracking?

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Yes. The 3D processing already delivers all spatial cues your brain and ears need to distinguish directions where the sound is coming from. Without motion tracking, the mix will be 3D (left, right, in front, behind, above or below you – all sources externalized) but when you turn your head, your mix will stay the same.

Do I need an iPad, Tablet or Smartphone?

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It depends. If you want to use the KLANG processor a personal monitoring system all musician should have access to their mixes.

This can either be done with KLANG:app on smartphone or tablets or with KLANG:kontroller. This works of course at the same time, it’s completely your choice.


How can KLANG:fabrik handle up to 16 mixes if it only has 8 stereo analog outputs?

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Depending on the IO configuration KLANG:fabrik can create up to 16 3D in-ear mixes. Each mixes consists of a stereo output pair. KLANG:fabrik flexible routing scheme allows to route mixes from the 3D in-ear mixing processor to any digital output interface and to the 8 stereo analog XLR outputs.

8 mixes can be routed to the 8 stereo XLR outputs. All available mixes – including all mixes that are routed to the XLR outputs – can be routed to any digital output interface. E.g. you can route the other mixes which are not already routed to the analog outputs via Dante to KLANG:quelle.

Why does KLANG:fabrik have two power supplies?

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One power supply is sufficient to power KLANG:fabrik. As common practice for professional touring audio gear, KLANG:fabrik offers a second power supply for redundancy. Connect it to a second, redundant power line if possible for extra safety if the first power line has an issue.

It can also be used to swap the power lines without any interruption of the audio stream. Connect the second power supply to a another power line. Check that both power supplies are active in the info screen e.g. via KLANG:app. Then disconnect the first power supply.

How many mixes, users and input channels can be handled?

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Please find information on the IO configuration for KLANG:fabrik here.


How can there be 5 mixes when the unit has only 4 stereo outputs?

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KLANG:vier can create 5 individual stereo mixes. A mix always consists of a stereo output pair. KLANG:vier offers 4 stereo headphone outputs and line level outputs. Mix #1, #2, #3, #4 are permanently routed to the 4 stereo analog outputs.

All 5 mixes are available via Dante. Hence, #5 can only be accessed via Dante and e.g. routed to a KLANG:quelle headphone amp or to a Dante breakout box or Dante enabled digital mixing console.

How many input channels and users can KLANG:vier handle?

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KLANG:vier can create 5 individual 3D mixes. A mix always consists of a stereo output pair.

24 input channels can be processed including EQs in 44.1kHz and 48kHz.

Warning – Power Supply Voltage – Service Required. What shall I do?

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In case KLANG:app shows a warning that the power supply of KLANG:vier or KLANG:fabrik needs to be checked. Please contact customer support and include a screenshot of the info screen. Email to support@klang.com

In case the voltage is below 4.7V the unit requires service immediately.

For KLANG:fabrik, we recommend to use both power supplies for stability reasons.



Can I route incoming ADAT signals to Dante?

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Yes, that is possible.

For KLANG:fabrik, this can be configured in KLANG:app routing page.

For KLANG:vier, KOS version 2.2.4 or higher and Dante Firmware 1.1.0 or higher is required. Details can be found here…


My system is not booting. What can I do?

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Please check again without any network or audio cables connected to the devices. For KLANG:fabrik make also sure to connect both power supplies. Make sure no USB drive is inserted. Check that the powerline is working properly. If your device is stuck in the boot process, proceed with the step by step guide shown in the recovery procedure here…

Dante Headphone Amp

How can I revert a fixed / static Dante IP?

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I cannot see my KLANG device in Dante Controller… You have probably configured you Dante module for a static / fixed IP address and you need to discover the unit’s IP address and revert it to factory defaults.

Please check our <a href=”https://www.klang.com/blog/reset-dante/”>dedicated guide to recover Dante devices.</a>


Find a detailed guide to Dante here: www.klang.com/dante

Can I use a different word clock source for the Dante network?

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Yes. Dante has the great advantage that it takes care of audio clocking almost automatically. If you use e.g. KLANG:vier with an ADAT input or KLANG:fabrik with ADAT or MADI or external Wordclock, or KLANG:vokal with MADI and you want to integrate the KLANG devices to a Dante network the clock has to be configured manually.

Set the KLANG devices to the clock source of your choice. In Dante Controller tweak the clock settings of this KLANG device in the “Clock Status” tab. Enable the “sync to external” and “preferred master/leader” for this unit. Now, the internal clock of the KLANG device will feed the entire Dante network and you can route audio from your KLANG processor e.g. to a :quelle or :kontroller.

Make sure the KLANG processors are not set back to Dante as the clock master in before unchecking the “sync to external” setting again. Otherwise, you will end up with the clock loop.


What is Dante?

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Dante is a proprietary audio over IP (AoIP) network protocol developed by the company Audinate. It is extremely versatile, robust due to redundancy features and still easy to use. Instead of analog multicores and several digital interface cables with Dante hundreds of channels of audio with high fidelity sound (24 or 32 bit, 44.1–192kHz) can be transmitted over hundreds of meters with only one network cable and maybe a second one for seamless redundancy.

Most manufacturers in the field of digital mixing consoles have already incorporated Dante into their products e.g. by supplying expansion cards. Among them Yamaha, DiGiCo, Soundcraft, SSL, PreSonus, Midas through Klarkteknik converter, Behringer and many many more. Converters between digital formats or to analog inputs and outputs are available in various configurations. DAD/NTP, Focusrite, Auvitran are just a few offering great connectivity possibilities.

Since 2015, Audinate’s Dante modules can be firmware updated to offer AES67 support enabling network audio connectivity to an ever wider range of products.

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