Release Notes

About KLANG Updates

KLANG releases major updates approximately 1–2 times per year, introducing new features and improvements.
A major version step is indicated by a change such as 4.x → 5.x or 5.5.x → 5.6.x.
These updates include simultaneous releases of both KLANG:app and KOS.

In addition, there are minor updates (e.g., 5.5.x → 5.5.y) for both KOS (KLANG Operating System) and KLANG:app.
These contain important fixes related to:

• Changes in operating systems (iOS, Android, macOS, Windows)
• Support for newly released smartphones or tablets
• Compatibility with third-party hardware, such as DiGiCo consoles

Minor updates are released more frequently — sometimes several app versions per month — to ensure the best possible user experience and compatibility with the latest platforms and devices.

Check out the details on the features added in version 5.7 along with a short overview video and detailed changelog.

What's New in KOS 5.7

What’s New in KOS 5.6

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5.6.19

2025-08-21 – KLANG:app (iOS and macOS only)

• KKA-1520 – Added option to disable local network access warning.

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5.6.18

2025-07-29 – KLANG:app

• KKA-1450 – Android SDK Version 35.
• KKA-1232 / KKA-1330 / KKA-1414 – Only a single warning when local network access is not granted for KLANG:app.

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5.6.17

2025-07-07 – KOS for :kontroller and KLANG:app

• KKA-1365 – Disable automatic Gain Adjust for :kontroller via CTRL + SHIFT + P.
  Parameter: KtrlAutoAdjust, Value: 0, Type: app on <kontrollerName>.
• KKA-1232 / KKA-1330 / KKA-1414 – Only a single warning when local network access is not granted for KLANG:app.

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5.6.16

2025-05-19 – KOS 2nd Generation and KLANG:app

• KKA-1232 – Improves Apple macOS network access behavior.
  Recommended update for macOS 15.5.
• KKA-1274 – Fixes rare DHCP IP issue on :kontroller.
• KKA-1291 – Fixes flickering on KLANG:app connect screen when connection is lost.
• KKA-1349 – Fixes preset import/export via USB on :kontroller.
• KKA-1352 – Fixes false IP error warning on startup.
• KKA-1375 – Fixes invalid IPs caused by CIDR mask being interpreted as IP digits.
• KKA-1381 – Fixes DMI-Dante64@96z firmware issue in :konductor (5.6.11–5.6.15).
• KKA-1383 – Console integration: fixes laggy fader response in rare cases.
• KKA-1384 – :kontroller: custom device/Dante name no longer reset to serial.
• KKA-1392 / KKA-1393 – :kontroller: after un-solo, channels no longer incorrectly shown as SILENT.

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5.6.15

2025-03-21 – KOS 2nd Gen only

• KKA-1234 / KKA-1236 – Fixes Dante subscription issue on IPcore :kontroller when transmitter reconnects.
• KKA-1327 / KKA-1332 – Smaller KOS update size and faster update process.
• KKA-1313 – Fixes rare audio mute on :kontroller.

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5.6.12

App Store release in progress (no KOS release)

• KKA-1302 / KKA-1288 – :konductor with DMI-Dante64@96 as audio master: SRC not supported.
• KKA-1308 – DMI firmware update warning only shown in Admin mode.
• KKA-1307 – Collect Logs now sends plain ZIPs.
• KKA-1309 – App/KOS update check runs less frequently.

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5.6.10

2025-02-07 – KLANG:app and KOS 2nd Gen

• KKA-1274 – Fixes DHCP IP assignment issue on :kontroller.
• KKA-1243 – Added optional default gateway setting (requires app & KOS update).
• KKA-1155 – Allows IPcore :kontroller to use static Dante IP with DHCP control.
• KKA-1277 – Display contrast on :kontroller now adjustable in CONFIG > SET.
• KKA-942 – New FPGA version for DMI-Dante64@96rev3.
• KKA-964 – Increases snapshot limit on 2nd Gen processors to 300.
• KKA-1255 – Stereo/3D mode selector in KLANG:app can now be hidden.
• KKA-1281 / KKA-1282 – Group mixing icon updates in realtime via remote app.
• KKA-1284 – Improved custom renaming for KLANG:app.
• KKA-1285 – Added OSC commands for :kontroller display dim/blackout.
• KKA-1289 – :konductor DMI clock now warns of sample rate mismatch when SSRC is unsupported.

2025-01-28 – KLANG:fabrik (KOS only)

• KKA-1265 – Fixes MADI routing issue after reboot.

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5.6.9

2025-01-08 – KOS 2nd Gen

• KKA-1136 / KKA-1185 – Fixes rare mute with EQs on :vokal, :konductor (v80), or DMI-KLANG. (New FPGA cores)
• KKA-1251 – Fixes sync issue with DMI-KLANG in OrangeBox (with DMI-MADI/Optocore).

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5.6.8

2024-12-10

• KKA-1223 – Fixes UDP/OSC overload issue on older KOS 5.5 and lower.
• KKA-1246 – OSC command /Ka/screen/user added for app & :kontroller.

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5.6.7

2024-11-18

• KKA-1239 – Added extra OSC listen port for DiGiCo MacroOSC.
• KKA-1244 – Fixes 3rd mix selection issue in CONFIG > CONNECT.

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5.6.6

• KKA-1232 – Fixes iOS 18 device discovery.

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5.6.5

• KKA-1220 – App pulls current version info from Web.
• KKA-1225 – Ensures :vokal does not send connect request unnecessarily.
• KKA-1214 – Improved stability when IP address changes.
• Minor fixes (MCU, beta).

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5.6.4

• KKA-1174 – Android app orientation behavior rolled back.
• KKA-1176 – :fabrik without MADI no longer shows MADI routing.
• KKA-1188 – :kontroller returns to Amb/Aux bank after preset load.
• KKA-1195 – Fixes DiGiCo console mapping toggle issue.
• KKA-1200 – Fixes Cue offset issue with hidden KLANG mixes.
• KKA-1207 – App now always shows correct console integration icon.
• KKA-1199 – Improved OTA update UI (progress bar and description).
• KKA-1201 – Potential fix for rare encoder jump on :kontroller or app.
• KKA-1209 – :kontroller app ignores duplicate packets.
• KKA-1214 – Fixes app crash on network interface change.
• KKA-1184 – Improved graphic style for overlay windows.
• KKA-1191 – License drag/drop on :vokal+ shows warning if not connected.
• KKA-1196 – OSC forwarding via app to processor (see www.klang.com/osc).

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5.6.2

• KKA-1160 – App shows release notes at startup.
• KKA-1170 – Fixes first keyboard shortcut failing after app launch.
• KKA-1168 – Fixes :kontroller showing in personal mode.
• KKA-1167 – Fixes macOS 12.7.5 :vokal+ shop URL.
• KKA-1165 – Fixes app/KOS version pull from server.
• KKA-1164 – URL opens show a message and copy to clipboard.
• KKA-1159 – Added OSC command for app shortcut:
  /Ka/shortcut s "CMD + SHIFT + C"
• KKA-1158 – Improved stereo panning law labels and help.
• KKA-1151 – Added custom OSC GUI using KLANGosc syntax.
• KKA-1148 – Fixes app close issue on macOS.
• KKA-1121 – Fixes error on KOS ZIP drop in app.
• KKA-945 – Fixes Clone Settings to ALL not applying on all :kontrollers.
• KKA-1169 – Added shortcut to message all apps/kontrollers:
  CMD + CTRL + ALT + SHIFT + M
• KKA-1078 – Added Save/Load Mix buttons in CONFIG > PRESET.
• KKA-1152 – Android app opens in portrait view if device orientation allows.
• KKA-1166 – Dynamic overlay windows now resize with app/screen orientation.
• KKA-1048 – Fixes console integration toggling unavailable channels/auxes.

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5.6.1

• KKA-337 – Fixes audio dithering issue with EQs on 2nd Gen processors.
• KKA-128 – Multiple mixes on a processor can now share the same name.
• KKA-1084 – Drag & drop show file on KLANG:app launches offline editor.
• KKA-1129 – Deleting a show file triggers an instant list refresh.
• KKA-1092 – Fixed IP settings now retrigger zeroconf/DHCP request on boot.
• KKA-1090 – Admin/Show passwords are now cascaded to all devices.
• KKA-1049 – Added vocal EQ preset with occlusion effect.
• KKA-1066 – FPGA-based VLAN filter on :kontroller prevents Ultimo lag.
• KKA-914 – Dante Controller no longer shows IPcore :kontroller with red 100M warning.
• KKA-611 – Rename :kontroller in CONFIG > CONNECT.
• KKA-1108 – Console session names with spaces converted safely for KLANG shows.
• KKA-1054 – Manual console mapping includes session load/save (for console 1742+).
• KKA-1113 – Manual mapping auto-enters Active on detection.
• KKA-1022 – Manual mapping forces init on app reconnect.
• KKA-1116 – Standalone works immediately after factory reset (no reboot needed).
• KKA-1015 – Channels can be renamed when mapping exists but console integration is off.
• KKA-1112 – Channel fader/position changes no longer reset time-out during timeout state.

What’s new in KOS 5.5

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5.5.12

2024-08-07 – KOS & :app

• KKA-345 – Improved device discovery across zeroconf and fixed/DHCP subnets.
  Gateway setting for fixed IPs was deactivated.
• KKA-1106 – Console integration: backup processor in redundant setups now starts without master console.
• KKA-1105 – Fixes app crash on special character keypress (Rosetta/Mac only).

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5.5.11

2024-07-08 – KOS & :app

• KKA-1057 – Console integration: improved switch-over for redundant consoles.
• KKA-1071 – Added Quick IP Wizard for static/fixed IPs in KLANG:app.
• KKA-322 / KKA-194 – Added Dante/MADI routing wizard for KLANG:vokal in KLANG:app.
• Easier setup of Set Device Name.
• Other minor fixes and improvements.

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5.5.10

2024-06-18 – KOS & :app

• KKA-817 – Show mode in KLANG:app shows mixes and channels for :konductor.
• Improvements for DiGiCo console integration.
• KKA-1007 – Fixes stereo channel not fully audible after enabling mapped channels.
• KKA-1013 – Fixes manual mapping > enable mapped channels and pull mix settings.
• KKA-1040 – Console status now warns when master console is missing in redundant setup.
• KKA-1005 / KKA-1032 – Improved session load with Lite integration; unmapping does not deactivate channels.
• KKA-1030 – Faster init with large sessions (many auxes and groups).
• KKA-1039 – Console now syncs automatically after session load.
• KKA-1038 – Unmapping a group now deactivates KLANG on console just like unmapping channels.
• KKA-987 / KKA-1005 / KKA-1031 – Improved sync after session load to prevent channel deactivation.

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5.5.9

2024-05-29 – KOS & :app

• KKA-883 / KKA-948 – Fixes rare unsynced state with Auto Mapping and existing KLANG activations.
• KKA-987 – Prevents auto-deactivation of nodes when loading *.ses.KLANGshow.
• KKA-999 / KKA-1007 – Ensures channel linking always uses first channel’s settings.
• KKA-1014 – Fixes crash when renaming groups or hitting enter on older macOS (Rosetta).
• KKA-1021 – Fixes icon misalignment in STAGE2/elevation view when using FoH mode.

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5.5.8

2024-05-15 – :app

• KKA-993 – Fixes false routing warning on :fabrik with console integration.
• KKA-916 – Re-enables channel 33+ routing on :vokal at 96 kHz.
• KKA-958 – Fixes rare audio issue on :konductor channels 17–32, mixes 1–8.
• KKA-976 – Fixes manual mapping mode reverting to auto mapping.
• KKA-989 – Adds KOS Update button for 1st gen processors.

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5.5.7

2024-05-06 – KOS & :app

• KKA-661 – Bigger scroll bar in KLANG:app for small screens.
• KKA-963 – Switching mix in CONNECT now opens fader view.
• KKA-969 – Cascade socket names shown in overlay.
• KKA-974 – One-click KOS update in INFO screen; drag & drop supported (macOS/Windows).
• KKA-980 – Fixes login issue with Connected Devices dropdown.
• KKA-977 – Fixes overlay message bug with DiGiCo console in manual mapping mode.
• KKA-805 – Improved stability of stand-alone remote mode.
• KKA-982 – Improved behavior of “Enable Mapped Channels” in console integration.
• KKA-988 – Re-enabled ADAT to Dante routing on KLANG:vier.

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5.5.6

2024-04-23 – KOS

• KKA-959 – Fixes OTA update issue on IPcore :kontrollers.
• KKA-961 – Fixes Amb/Aux control issue introduced in 5.5.5.

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5.5.5

2024-04-18 – KOS & :app

• KKA-952 – Fixes quick save/load issue on :kontroller Amb/Aux menu.
• KKA-949 – Improved USB drive detection.
• KKA-944 – Fixes show file load when fewer channels than current processor capacity.
• KKA-832 – Touchscreen right-click gesture can pan stereo channels.
• KKA-518 – Fixes DMI-Dante card network after KOS update without power cycle.
• KKA-420 – Added “Exclusive Solo” functionality.
• KKA-324 – Added “Sync from other device” to copy all settings.
• KKA-78 – Customizable :kontroller bank at boot.

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5.5.4

2024-04-10 – KOS & :app

• KKA-518 – Fixes DMI-Dante network issue after :konductor KOS update.
• KKA-881 – Exclusive Solo option for :kontroller and KLANG:app.
• KKA-831 – Added “Enable Mapped Channels” to Channels tab.
• KKA-941 – Adds KLANG integration restart via console buttons or external control.

What’s new in KOS 5.4

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5.4.14

2023-12-19 – KLANG:app

• KKA-688 – Fixes :kontroller mix assign dropdown when in “Follow this App” mode.

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5.4.13

2023-12-18 – KLANG:app (Android only)

• KKA-660 – Fixes a rare Broadcast Discovery Burst on specific Android devices.

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5.4.12

2023-12-07 – KLANG:app & KOS

• KKA-650 – Fixes Broadcast warning for first network port.
• KKA-657 / KKA-660 – Reduces broadcast messages from app and :kontroller.
• KKA-662 – Reduces memory writes to SD card.
• KKA-639 – Fixes Reset Dante IP functionality in 5.4.

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5.4.11

2023-12-05 – KLANG:app

• KKA-637 – Enables/disables mix name/icon editing in personal mode via:
  CONFIG > INFO > Set Menu > Protect Mix Names in Personal Mode
• KKA-652 – Copy Meta now has an option to clone only channel names to all mixes.
• KKA-643 – Fixes iOS personal preset import (*.kup files).

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5.4.10

2023-11-27 – KOS

• KKA-625 – Ensures channel order updates immediately when loading a personal preset.

2023-11-27 – KLANG:app

• KKA-594 – Improved visibility of non-editable text fields in app.

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5.4.9

2023-11-06 – KOS only

• KKA-612 / KKA-158 – Fixes :kontroller Ultimo chip not always reporting Dante status.
• Fixes metering issue and KOS update on IPcore :kontrollers.

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5.4.8

2023-10-30 – KLANG:app only

• KKA-599 – Fixes issue when collecting log files from apps.
• KKA-600 – Improved handling of apps with the same name (e.g. localhost on iOS 17).

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5.4.7

2023-10-19 – App & KOS (2nd Generation)

• KKA-586 – Fixes issue with auto sample rate detection on :kontroller at 96 kHz.
• Device Identify now also sets a marker in log files via broadcast.

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5.4.6

2023-10-04 – App & KOS

• Fixes temporary issue with :kontroller settings introduced in 5.4.4.

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5.4.4

2023-09-28 – App & KOS

• Fixes audio issue on :konductor with DMI-MADI and new hardware revision.
• Adds Set Global Values feature.
• Adds Transfer + Load Preset functionality.
• Adds iOS/iPhone Portrait Mode support.
• Adds Send Custom OSC shortcut: CTRL + SHIFT + O
• Shows current mix in Channel Details view.
• Minor fixes included.

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5.4.1

2023-09-01 – App & KOS

• Initial KOS 5.4 release.

What’s New in KOS 5.3

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5.3.14

2023-05-31 – KOS only

• KKA-253 / KKA-262 – Fixes an issue with preset load on linked stereo channels.

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5.3.13

2023-04-05 – App & KOS (Zynq-based devices)

• KKA-268 / KKA-263 – Fixes rare issue where :kontroller had no network after boot.
• KKA-312 – Fixes engineer CUE not working in app show mode.
• KKA-253 – Fixes issue with linked stereo channels in standard stereo mode.

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5.3.12

2023-04-05 – KOS (:konductor only)

• Added support for new revision of DMI-DANTE 64@96z, including firmware/FPGA update files.

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5.3.11 / 5.3.10

2023-02-02 – KLANG:app & KOS

• Initial Release.

What’s New in KOS 5.2

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5.2.96

2022-11-02 – KOS

• Fixes boot issue with :konductor using Optocore DMI module not always initializing.
• Personal presets no longer change fader range limits on the processor.

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5.2.95

2022-09-30 – KOS & KLANG:app

• Fixes detection issue with Optocore DMI cards on :konductor boot.
• "Follow this App" settings are now preserved when assigning mixes on other :kontrollers.
• "Follow this App" no longer uses IP fallback; only sends actual changes.
• Fixes OSC command /switchUser.

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5.2.92

2022-09-06 – KOS & KLANG:app

• KLANG:app can now filter discovered devices and sort by type, IP, or name.
• Quick access to preset save/load on :kontroller via Amb/Aux menu.
• Fixes :kontroller presets appearing empty despite valid content.
• Fixes KLANG:app MIDI MCU remote control bug (introduced in 5.2.58).
  ➤ Ensure MIDI_MCU_5.2.89 is selected for each MCU interface in CONFIG > EXT CTRL.
• Adds mix name to MCU displays and real-time mute/solo button feedback.
• :kontroller "Follow this App" now uses KOS name (not IP).
• Fixes a stability issue on :fabrik / :vier.
• Fixes log2email function.
• Fixes GUI bug with :kontroller VLAN settings.
• Changing VLANs on :vokal/:konductor triggers auto-reboot.
• Adds OSC value requests: /azi, /name, /mute, /solo, /stereo, /mode, etc.
• Reduces OSC load from group solo/mute.
• Fixes :kontroller showing PLS UPDT incorrectly in connect screen.

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5.2.80

2022-07-06 – KOS & KLANG:app

• Ensures channel mix settings are always sent via OSC (requestAll, preset load).
• Fixes issue with preset channel order resorting.
• Uses correct Audiotonix MAC address prefix.

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5.2.78

2022-06-29 – KOS & KLANG:app

• Improved handling of silent groups (app and KOS).
• Relative mix levels in silent groups are preserved (KOS).
• Fixes jumping source positions in Stage/Elevation views.
• Reduces OSC traffic when changing source positions.
• Adds Push Settings to All via broadcast: CTRL + CMD + ALT + SHIFT + click.
• Enhanced DiGiCo mapping: shortcut CMD + OPTION + R for “Ripple all Mapped ON”.
• Clear down ripple: map aux to “none” and ripple.
• Adds Advanced App Maintenance Mode.
• Stage view: Flip LR now respects group selection.
• Fixes EQ and sampling rate reset behavior in KLANG:app for :vokal / :konductor.
• Fixes channel settings GUI on :konductor.
• Show name in Autosave now persists across reboots.
• Group assignments revalidated when number of groups changes.
• :kontroller solo clear reacts faster.
• More Me on :kontroller now brings up master volume and stops at max.

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5.2.74

2022-05-17 – KOS

• Fixes EXT CTRL dropdown closing unexpectedly when DiGiCo console integration is active.
• Fixes default routing for CUE IN, and a cueing bug on Konductor Engine B.
• Fixes metering updates not displaying properly.
• Removes NotSet error messages in Zynq logs.
• Speeds up boot by avoiding unnecessary IP reset.
• Personal presets now correctly set icons (requires KOS + app).
• Fixes engine B clock error messages.
• CIDR subnet mask notation shown in INFO screen and Windows app.

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5.2.71

2022-04-25 – KOS (Zynq only)

• Improved audio clock stability on :konductor.
• Fixes occasional lag on :kontroller.
• Fixes multicast stats: values now cleaner and non-negative.
• Long press on GROUPS in :kontroller only disables Group Lock.
• Prevents duplicate DMI reboots on :konductor startup.
• Snapshot OSC command /Kf/co/updateSnapshot uses current snapshot if called without args.
• KOS boot checks and cleans up /tmp data if needed.
• Cleaned log file output: removed special chars and invalid Dante protocol logs.

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5.2.70

2022-04-08 – KLANG:app

• App attempts to auto-connect to last known KLANG IP at startup.
• Added “Connect IP” (shortcut: CMD + SHIFT + C) to manually enter IP.
• Fixes console type setup bug.
• Console integration now suppresses false save indicators with iPad app.
• Always pulls session name from console.
• Improved console sync speed (esp. SDQ2022).
• Cleans up local IP display (especially on Windows).

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5.2.59

2022-02-17 – KLANG:app

• Faster init with console integration on cascade setups.
• Added translators for SD/Q consoles to improve sync.
• Missing console parameters are re-requested automatically.
• Ripple Auxes now also pulls aux names.
• Increased network buffer size; more reliable clean flush.
• “Clone This to All” respects channel recall safe setting.
• Deactivates console integration when defaultOFF is loaded.
• Improves general app stability.

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5.2.58

2022-02-17 – KOS

• Fixes rare audio issue on :vokal (FPGA, engine).
• Improved Optocore DMI handling on :konductor.
• Improved OTA Update process (from this version onward).
• DHCP client retry time set to 60s on Zynq.
• :konductor DMI MADI/Optocore cards now more tolerant to clock offset.

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5.2.56

2022-01-26 – KOS & KLANG:app

• Added Quick Mix Select on :kontroller via Amb/Aux mix level push.
• Added High Contrast Skins.
• Speed improvements for DiGiCo console integration.
• Improved network buffer init (fixes macOS M1 issues).
• Fixes OSC issue from Pan Mode default button press.
• Clearer explanation where show files are saved.
• Better copy/paste overlay behavior.
• Ensures all :kontrollers can reach 100% master volume.
• Fixes unnecessary Dante name assignments from :kontroller.
• Logs headphone overcurrent + applies low cut safety filter.
• :kontroller display dim now responds on first click.
• Improved fader zoom behavior across mixes.
• Less verbose output when changing fader range in console integration.

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5.2.54

2021-12-02 – KOS & KLANG:app

• Fixes file sorting in Demo Mode.
• Removed obsolete hardware channel swap option.
• Improved skin handling and clock warning colors.

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5.2.53

2021-12-02 – KOS & KLANG:app

• Fixes stereo linking during old KOS 3 preset imports.
• Improved USB drive compatibility for updates.
• Fixes boot delay on :konductor Engine B.
• Fixes MADI DMI clock phase offset issue.
• Fixes Optocore card multi-card detection issue.
• App Ext Ctrl now defaults to DiGiCo.
• Improved responsiveness in routing screen.
• :konductor shows 64×64 routing grid when no card installed.
• More robust handling of duplicate preset names.

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5.2.43

2021-11-11 – KOS & KLANG:app

• Full support for KLANG:konductor, incl. new DMI firmware and updater.
• Added Orbit Tools and Quick Orbit Positions in KLANG:app.
• Added Expert Network Settings with VLAN support.
• Added multicast/broadcast stats for all Zynq-based devices.
• Added :kontroller LowCut EQ presets and Factory Reset.
• Added broadcast Display Dim from app INFO > SET MENU.
• Console Integration:
• Ripple inactive channels
• Faster IP assignment and GUI suggestions
• Reset button actions:
• Short press: renews IP or writes log to USB
• Long press: full reboot
• Fixes:
• Wrong IP shown in SD/Q panel
• Metering issue on :kontroller
• Demo Mode crash on some Windows systems
• :fabrik IO settings button bug
• Various cosmetic fixes