FIR Designer Release Notes

Learn more about FIR Designer or download a free demo.

Licensees can access the latest download on the “update available” dialog within FIR Designer.

Version 4.7.6 (5 October 2026)
  • Fix: AuditionDSP was still running IIR filters for channels where the IIR Filters tab “Enable” was unchecked.
  • Improvements to IIR Filters tab filter counts and limit checks.
  • Various UI fixes and updates.
Version 4.7.4 (22 September 2026)
  • Fix to LPIF export for JBL Professional.
Version 4.7.3 (4 September 2026)
  • Minor GUI update to IIR filter counts.
Version 4.7.2 (29 August 2026)
  • Fix: a change between 4.7.0 and 4.7.1 caused most IIR filters, saved only with 4.7.0, to not load. 4.7.2 now loads correctly.
Version 4.7.1 (27 August 2026)
  • Speed improvements to AuditionDSP.
  • Various UI fixes and updates
Version 4.7.0 (21 July 2026)
  • New “JBL Professional” IIR filter mode for emulating the group EQ in “Performance” software for SRX900 series loudspeakers.
  • Supplementary response directory information and settings are now saved in the project file. Supplementary response files are now loaded at project load.
  • Fix: the FIR output gain was incorrectly being used twice (instead of once), both for LPIF export and AuditionDSP.
  • Various UI fixes and updates, including new horizontal zooming on most impulse response plots.
Version 4.6.6 (14 April 2026)
  • Fix: GPD tab impulse response sometimes wouldn’t display correctly.
  • Update: Added imported measurement step response to the Export tab.
Version 4.6.5 (19 March 2026)
  • Various UI fixes and updates.
Version 4.6.4 (27 February 2026)
  • Update to Marani DTP to communicate with MIR488I and MIR888F processors.
  • CLIO SPL files can now be imported.
  • Various UI fixes and updates.
Version 4.6.3 (21 January 2026)
  • Update: Renamed “Second Response” to “Reference Response”.
  • Update: Moved the frequency sorting from a dedicated button to clicking the “Freq” column header.
  • Various UI fixes and updates.
Version 4.6.2 (13 December 2025)
  • Various UI fixes and updates.
Version 4.6.1 (6 December 2025)
  • Fixed a crash in the AuditionDSP realtime DSP engine.
Version 4.6.0 (5 December 2025)
  • New: An additional measurement response can be loaded on a new “Second Response” tab on the “2nd view” window, and the magnitude response can be displayed on all of the “2nd View” magnitude/phase plots. The magnitude of this response can also be flipped or inverted.
  • New: Filter list tables, on most workflow tabs, now have a sort button. Press once to sort in ascending frequency order and again to sort in descending frequency order.
  • Various UI fixes and updates.
Version 4.5.2 (24 November 2025)
  • New: Sample rate support for Hypex (93.75 kHz).
  • Fix: When using a “FIR Output Sample rate” different to the design sample rate, the FIR filter could be corrupted.
Version 4.5.1 (21 September 2025)
  • Fix: Auto Mag table frequency entry was broken. (Bug introduced in 4.5.0.)
Version 4.5.0 (3 September 2025)
  • New: “Bose Professional” IIR filter mode for designing and exporting EQ to processors and amplifiers in ControlSpace Designer.
  • New: The Help menu now has a “Check for updates” option.
  • Improvements to IIR filter conversion between brands.
  • Fix: Mouse control on Auto Mag and Auto Phase tab bands was allowing band start and end frequencies to cross, causing the program to crash.
  • Fix: The red cross-hair phase value was displaying incorrectly for phase-only plots when zooming.
  • Various UI fixes and updates.

Version 4.4.5 (3 July 2025)

  • Fix to “Fohhn Audio” IIR filter mode.

Version 4.4.4 (17 June 2025)

  • New: “Fohhn Audio” IIR filter mode.
  • Improvements to IIR filter conversion between brands.

Version 4.4.3 (22 May 2025)

  • Fix: When loading some SMAART .TRF files, the displayed impulse response is incorrect.

Version 4.4.1 (3 April 2025)

  • New: The channel ‘Import’ tab now has a windowing option for the impulse response. The windowing, if enabled, is applied prior to frequency smoothing. Windowing options include those available for the final FIR filter – Boxcar, Cosine Tapered, Modified Adriene, Hanning, Blackman-Harris and Kaiser-Bessel – and with adjustable start and end lengths, plus a new Frequency Varying Time Window option.
  • New: Any plot can now be exported as a PNG image file and any individual plot trace can be exported to a multi-column text (TXT) file. To access plot export, click the download button on the lower right of each plot. When exporting images, specific image width and height (in pixels) can be set.

Version 4.3.14 (26 March 2025)

  • Fixed problem with 1 octave smoothing on various tabs. (Bug introduced in version 4.3.12.)

Version 4.3.13 (15 January 2025)

  • Fix: MLS measurement files were not loading correctly.

Version 4.3.12 (5 December 2024)

  • Fix to plotting of phase wrapping on the Export tab FIR “Total Error” plot.

Version 4.3.11 (29 November 2024)

  • New Supplementary Responses manual scaling option for the polar heatmap.
  • Mouse control improvements to filters on the Target magnitude and phase sub-tabs.
  • Fix to Preferences changes not saving and loading correctly.
  • Fix to the coherence plot, on the Import tab, not being the correct colour.

Version 4.3.9 (25 October 2024)

  • Fixed a crash when using “Direct Design” mode.

Version 4.3.8 (11 October 2024)

  • Various computation speed improvements. (No functional changes.) This should address much of the laggy behaviour when using the mouse to adjust filters whilst “Auto Mag” and “Auto Phase” are enabled.

Version 4.3.5 (3 August 2024)

  • Various user-interface updates and fixes.

Version 4.3.4 (27 July 2024)

  • Updates to Auto IIR usability, including retaining settings between Auto IIR window closing and reopening.

Version 4.3.3 (22 July 2024)

  • New “Audio Weaver” IIR filter coefficient export.
  • Update to the loading of ETM and STO measurement files that have very long impulse responses.
  • Various UI fixes for problems introduced in version 4.3.0.

Version 4.3.2 (16 July 2024)

  • Fixes to UI problems with the StormAudio IIR filter mode.

Version 4.3.1 (14 July 2024)

  • UI Fix: FIR Designer normal (light) mode had display problems when running on Windows with the operating system mode set to dark.

Version 4.3.0 (12 July 2024)

  • New: FIR Designer now has a dark user interface theme available on both macOS and Window. To switch between light and dark themes, in Preferences,