RimuSDR Release Notes

Enhancements

• Tuner Genius XL support - RimuSDR now detects a TGXL on the network and exposes a full control panel when present.
• Wavelog / Cloudlog integration - New RimuCAT port type enabling direct HTTP API integration with Wavelog and Cloudlog. Live frequency/mode/power updates flow into the logbook, and click-to-tune commands return to the radio - no WaveLogGate or CloudlogCAT process required.
• Waterfall history scrolling - Operators can now pause the waterfall and scroll backward through captured history.
• HamLib protocol support in RimuCAT - New RimuCAT port type providing HamLib compatibility for third-party applications lacking Flex-style CAT support.
• MIDI keyer support - Added CW keying over MIDI. Verified with Lynovations CTR2 and Halibut HaliKey devices, and compatible with other MIDI keyers. See FAQ notes on CW sidetone latency.
• Direct IP radio connection - Radios can now be connected via manually entered IP address, improving operation over VPNs and segmented networks.
• Add "Zoom to Band" and "Zoom to Segment" - Added the missing zoom features to the panadapter.
• Application log cleanup - Added log rotation and size governance to prevent runaway log growth when debug logging is enabled.

Fixes

• Panadapter visibility - Manually entered off-screen frequencies now reposition the panadapter correctly.
• Waterfall sync - Waterfall no longer lags behind the panadapter after external frequency changes.
• Slice dragging behavior - Panadapter no longer pans when the operator intends to drag a slice after a frequency change.
• Off-screen slice indicators - Clicking an off-screen slice indicator now restores the slice to view.
• External tuning handling - External frequency changes are no longer ignored after knob or keyboard tuning.
• DAX RX gain - RX gain slider now functions correctly under MultiFlex.
• Memory handling cleanup - Fixed a number of issues across all 3 applications that left memory in use.
• RimuSDR SEGFAULT - RimuSDR sometimes SEGFAULTs when RimuCAT connects due to unsafe multi-thread access to variables.
• Error running AppImage on Artix Linux - Indirect reference to a systemd library which is not present on Artix.
• MultiFlex API fixes - Several API layer fixes to support multiFLEX.
• Thread safety - Added mutex guards for thread safety in the API layer.
• Windows crash-on-close - Fixed initialize/uninitialize issues in WASAPI classes.
• WWV/GEN band buttons - Sent literal labels instead of numeric band codes, so the buttons were silently ignored.
• Manual slice frequency entry - Didn't recenter the Panadapter or show the offscreen indicator.
• License Class dropdown - Showed only "None" because band-privileges JSON wasn't reliably staged.
• Audio device refresh - PulseAudioEngine's "Refresh Device List" was a no-op.
• CW sidetone latency overhaul - Gave CW sidetone its own low-latency stream with sample-accurate keying, cutting measured key-to-tone latency.
• Right side panel flicker - When changing bands, the right side panels flickered due to cached slice values.
• RimuDAX performance & stability audit remediation - Fixed the audit's most user-visible bug (no event handlers installed after a radio-loss reconnect, leaving DAX dead until restart), a TX audio glitch from dropped partial reads, and a stuck MOX silence path.
• RimuDAX follow-on crash/race fixes - Closed several use-after-free and lost-wakeup bugs in RX/Mic/TX audio channel teardown.
• RimuCAT performance & stability audit remediation - Fixed a CommandQueue use-after-free, PTY data corruption and CPU busy-spin, unsynchronized shared-pointer races, a Winkeyer parser hang, an OTRSP stall that affected every port, and a log filter bug that hid warnings at the INFO level.

Summary

• Maintenance release — Linux packaging reliability. No functional or UI changes.
• Applications are unchanged from 1.1.10. Only the Linux packages were corrected to install and launch reliably on minimal installs and newer distributions. Windows and AppImage builds were unaffected.
• All packages are now validated by automated install + launch tests in clean Ubuntu 24.04, Ubuntu 26.04, and Fedora 43/44 environments before shipping.

RimuSDR

• Fixed a startup crash on Linux systems whose system Qt is newer than the bundled version (e.g. Fedora 44, which ships Qt 6.11), where the app aborted with version 'Qt_6.11' not found (required by libQt6Network.so.6). The Qt Network library is now bundled, so RimuSDR no longer loads an incompatible system copy.
• Fixed .deb packages failing to start on minimal Debian/Ubuntu systems due to an undeclared ALSA runtime dependency.
• If you previously worked around the Fedora startup error by copying libQt6Network from RimuDAX into the RimuSDR folder, you can remove that workaround - installing 1.1.11 supersedes it.

RimuDAX

• Fixed launch failures on minimal Debian/Ubuntu systems - the bundled audio backend (PortAudio) requires ALSA, and the credential-storage library (libsecret) was undeclared; both are now declared.
• Fixed the application failing to start on minimal Fedora installs, where the Qt display plugin could not load because libxcb-cursor was missing. The RPM now pulls it in automatically.

RimuCAT

• Fixed .deb packages failing to start on minimal Debian/Ubuntu systems due to an undeclared credential-storage (libsecret) dependency.

Enhancements

• Add SmartSDR+ feature: TX Passband.
• Add SmartSDR+ feature: Filter Settings - If the radio has SSDR+ then honor that, else use locally stored filter settings.

Fixes

• SmartLink Manager is not using the new login dialog.
• RimuDAX does not open RX Streams in SmartLink.
• UI issue with Slice Flag Audio drop down.
• Add Digital Offset to Slice DSP Panel.
• Add fallback to serial number in radio discovery dialog if no nickname.
• Fix repositioning lag of open slice panels when the slice tuning flag is being dragged.
• Fix visual implementation of RIT.
• Fix RTTY Mark/Shift implementation.
• Configuring Audio settings requires pressing Apply button.

Enhancements

• Power Genius XL is now supported.
• Implemented popup radio toast messages.

Enhancements

• Flex Control Knob is now fully supported.
• Antenna Genius control is now fully supported.
• Waterfall Performance Boost - Reduced CPU usage across all platforms.
• RX buffer flush + Opus suppression during TX for cleaner transitions.
• Added offline license deactivation process.
• Spot Levels Increased - Up to 15 levels.
• MIDI Improvements - Better device detection, loopback filtering, new actions, UI refinements.
• SmartLink Login Improvements.
• New statistics dialog + improved audio path.

Platforms

• Support for full RimuSDR suite on Ubuntu 24.04 and 26.04 on aarch64 (deb and AppImage).
• Support for Fedora 44 (rpm package).
• Fixed Windows build filename format.
• Discontinued build for Fedora 42 which is EOL.

Fixes

• Multiple panadapter simultaneous open issue fixed.
• Diversity panel now shows gain/phase values.
• Fixed Smartlink caching.
• Waterfall time-scale drag regression resolved.
• Spectrum fill setting now saves correctly.
• MIDI device detection fixed on Windows.
• Spot overflow handling corrected.
• FM OPT + XVTR settings now persist.
• FM property changes now correctly update the slice flag and RX panel.

Fixes

• RimuSDR : Fix Slice Audio panel so that it's sized correctly for Diversity.
• RimuSDR : Fix Slice Tuning flag passband z-order when two slices are on the same frequency.

Enhancements

• RimuSDR : Added DVK panel.
• RimuSDR : Added MIDI controller support, including support for Lynovation CTR2 controllers (https://ctr2.lynovation.com/).
• RimuSDR : Sub-band display reworked to more closely match the SmartSDR+ behavior while remaining fully client-side.
• RimuSDR : Customizable filter widths implemented natively, with no dependency on SmartSDR+ licensing.
• RimuSDR : Diagnostics dialog now includes a full radio feature list for easier troubleshooting.
• RimuSDR : Change slice panel behavior to allow audio, DSP, Mode, RIT, DAX panels to remain open simultaneously.
• RimuSDR : Remove digital filter offset from DSP slice tuning panel to match SmartSDR.
• RimuDAX : Enhanced debug level logging.
• RimuCAT : Enhanced debug level logging.
• APILayer : Updated protocol layer to align with FlexLib 4.2.

Fixes

• RimuSDR : Improved Slice Tuning flag behavior for smoother keyboard arrow-key tuning.
• RimuSDR : Settings dialog hardened for better reliability across distros.
• RimuSDR : Fixed performance issue with large number of spots.
• RimuSDR : Right side panel button states and panadapter splitter position were not being saved.
• RimuSDR : Fixed panadapter splitter behavior to prevent panel collapse.
• RimuSDR : Fixed TX Band Settings dialog to display correct columns for FLEX-6300.
• RimuSDR : Fixed font size of buttons in slice tuning flag.
• RimuSDR : PC Audio gain value is not stored in settings.
• RimuCAT : Added validation to ensure a Slice is selected before saving.
• RimuDAX : Resolved potential driver-handling edge cases.

Enhancements

• RimuSDR : Added trial mode for downloads. Trial mode restricts RimuSDR users to 80M and no TX, allowing a trial before purchasing a license.
• RimuSDR : Added FreeDV support. Running FreeDV Flexradio AppImage will automatically add slice modes FDVU and FDVL to RimuSDR.
• RimuSDR : Implemented Quick Audio recording/playback.
• RimuSDR : Improved Sub-Band Display, added IARU regions sub-band selection.
• RimuSDR : Added USB Cable menu option.
• RimuSDR : Improved SmartLink authentication speed, increased timeout for slower networks.
• RimuSDR : Added selected global profile to application title.
• RimuSDR : UI adjustments to status bar, contrast settings, color theme.
• RimuCAT : Added protocols: Passthrough, N1MM Spots, Winkeyer, ORTP (note these 4 protocols have received minimal testing).
• RimuCAT : Added experimental .deb builds for arm64.
• RimuCAT : Added RPM builds for Fedora 42, Fedora 43, Rocky 9, Rocky 10.

Fixes

• RimuSDR : Minor UI adjustments to status bar.
• RimuSDR : Mode selection via profile : Selecting a mode (Phone/CW) using a profile does not trigger the P/CW panel to toggle.
• RimuSDR : Keyboard tuning causes VFO to drift 1 Hz.
• RimuSDR : Slice flag sliders jump 3 values when using the mouse wheel.
• RimuSDR : Forcibly disconnected in multiFLEX mode would cause receive audio to be silently absent on reconnect.
• RimuDAX : TX audio channel could become permanently stuck in the Busy state on some launches.
• RimuDAX : Connecting RimuDAX to a radio that was already using a PC microphone (Remote Audio) would force-enable DAX, causing microphone audio to be permanently lost if the user subsequently disabled DAX from the radio panel.
• RimuDAX : Prevent Linux from auto-switching audio defaults upon audio module load.
• RimuCAT : SIGSEGV when deleting a port.
• APILayer : Active slice was being determined incorrectly.

Enhancements

• RimuSDR : Added keyboard shortcuts.

Fixes

• APILayer : Fix locale issues for floating point conversions.
• RimuSDR : Add guards against zero bandwidth in waterfall frequency settings.
• RimuSDR : Correct input device index validation in PulseAudioEngine to allow auto-select.
• RimuSDR : Enhance panadapter bandwidth handling and add startup telemetry logging.
• RimuSDR : Gracefully handle network connectivity issues during license activation.
• RimuSDR : Radio Setup TX tab Interlock Timeout can't be adjusted correctly.
• RimuCAT : Fix port disconnection when changing bands.

Initial Release

• First public release of the RimuSDR suite including integrated DAX and CAT components.