FIR DESIGNER

Create finite impulse response (FIR) filters and mixed FIR + IIR filtering solutions for loudspeakers.

Load filters into any FIR capable speaker processor or amplifier. Advanced Direct-to-Processor function available for some brands.

Using FIR Designer 2’s single-channel workflow, build a complete loudspeaker preset (DSP signal chain) by generating Summary Output files in combination with FIR &/or IIR filter files.

Create loudspeaker tunings/presets with specific magnitude and phase characteristics.

Match different makes & models of loudspeakers in install systems.

Perform system/room correction.

Features

Intuitive, fast workflow from impulse response import through to filter coefficient export
Continuous filter calculation and error display as parameters are updated
Two workflows
- FIR filter design from a loudspeaker measurement
- Direct FIR design, without a measurement
FIR only or mixed IIR & FIR design
FIR Filter sample rates: 12, 24, 44.1, 48, 88.2, 96, 176.4 and 192 kHz
IIR filters (unlimited)
- Bandpass, low and high shelf
- Low-pass and high-pass Bessel, Butterworth, 2nd order variable Q, Chebyshev I & II, Elliptic, Linkwitz/Riley & Neville Thiele notched crossover.
- IIR coefficient export: regular transfer function and MiniDSP formats.
IIR filter modes with brand-specific parameter limits
- General (all of the above filter types)
- Linea Research
- Powersoft
- QSC Q-Sys
- Symetrix
IIR reference mode and reference editor with IIR filter conversion between brands
FIR filter design
- Magnitude Adjustment using common filter prototypes, above, and with minimum, linear and maximum phase options.
  - Keele/Horbach crossovers
  - Linear-phase brick-wall crossovers
  - Linear-phase complementary crossovers using common IIR low-pass and high-pass filter responses
- Phase Adjustment using minimum-phase and maximum-phase all-pass filters, and a unique 4th order all-pass parametric phase filter
- Automatic magnitude correction with smoothing
- Automatic phase correction with smoothing
- EQ Voicing (post target) using common filter prototypes
- Unlimited filter prototypes and automatic correction frequency bands
Target responses:
- User-defined parametric magnitude target with low frequency shelf and unlimited slope segments,
- Impulse response target from file (with options to use magnitude only or magnitude and phase), or
- Both user-defined and file responses combined.

Use coherence in automatic magnitude and phase correction algorithms
Load and view loudspeaker impedance
Import measurement resampling (measure at one sample rate and export filters at any sample rate.)
Second View: an additional window for any workflow plot, which can be viewed on the primary display or on a different monitor/display.
Continuous Wavelet Transform display for time/frequency impulse response analysis.
SMAART® Control for live measurement streaming and capture directly into FIR Designer.
Comprehensive range of measurement file formats (TXT – magnitude/phase/coherence, TXT – Klippel, TXT – samples, WAV, STO – SysTune Overlay, TRF – SMAART Trace, ETM – Easera measurement, SPK – Monkey Forest and more)
Multiple export formats compatible with most processors and amplifiers (including Powersoft, BSS, miniDSP, EV/Dynacord, Linea Research, DFM and more)
Processor gain, polarity & delay settings
Generate complete loudspeaker presets via the processor channel summary setting export option
Supplementary Responses window for seeing the effect of processing on other measurements
Direct-to-processor (DTP) functionality:
- To LAKE PLM & D series amplifiers and LM series processors. Requires the FIR Designer LAKE plugin and the LAKE FIR 3-way module.
- To Powersoft X, Ottocanali, Quattrocanali and DueCanali series amplifiers. Works via an XML file which can be loaded into the amplifier’s “Speaker EQ” or “Output EQ”.
- Optionally side-load pre-existing FIR filters (with automatic sample-rate-conversion, if necessary) from other programs for transfer to LAKE &/or Powersoft. Rewindow longer FIR filters to the LAKE & Powersoft tap limits.
Integrated Measurement Averaging
- Load up to 200 measurements of any type
- Multiple level matching options
- Auto time alignment with manual adjustment
- Four averaging modes: Complex, Power (flat phase), Power (minimum phase) and Power (minimum phase + reference excess phase)
- Export averaged response in a variety of formats.
Moveable license: deactivate and reactivate on a new computer.