FIR Designer
Create finite impulse response (FIR) filters and mixed FIR + IIR filtering solutions for loudspeakers.
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, 96 and 192 kHz
- IIR filters (unlimited)
- Bandpass, low and high shelf
- Low-pass and high-pass Bessel, Butterworth, 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
- FIR filter design
- Magnitude Adjustment using common filter prototypes, above, and with minimum, linear and maximum phase options.
- 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
- 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.
- 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 and more)
- Processor gain, polarity & delay settings
- Generate complete loudspeaker presets via the processor channel summary setting export option
- Direct-to-processor (DTP) functionality:
- To LAKE PLM & D series amplifiers. 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”.
- Can optionally side-load pre-existing FIR filters (with sample-rate-conversion, if necessary) from other programs for transfer to LAKE &/or Powersoft (subject to their FIR 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)
- Moveable license: deactivate and reactivate on a new computer.
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Examples
Measurement Averaging (up to 200 files)
Continuous Wavelet Transform Display
Target File with Non-flat Phase
Direct Design Mode
