FIR FILTER BASICS

All about FIR & the benefits for audio optimization

CREATE FIR FILTERS

Software for filter & preset design

LOAD FILTERS & PRESETS

Find FIR-Capable amps & processors

We provide software tools for equalizing audio systems and creating custom finite impulse response (FIR) filters & complete mixed FIR + IIR filter loudspeaker presets for single and multi-way loudspeakers.
Products in the Eclipse Audio range share an intuitive workflow that uses imported loudspeaker measurements as the starting point for filter & preset design.

Our Products

Windows & macOS versions available. Download a free demo version of any product & use for as long as you’d like.

FIR Designer M

FIR Designer

FIR Creator EX

FIR Creator

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Free Tools

Windows & macOS versions available. No time limits or restrictions on use.

Averager

SpeakerMeasure

Latest News

Free SpeakerMeasure Automates AES75-2022 Test Procedure

Posted on
New SpeakerMeasure from Eclipse Audio (the developer of FIR Designer) is a completely free software tool designed for loudspeaker manufacturers and designers who are measuring loudspeaker maximum linear sound levels using the AES75-2022 standard for acoustics. SpeakerMeasure automates most of … Read More
FIR Creator v1.7

New Features Added to FIR Creator EX

Posted on
Several of the new features recently added to FIR Designer & FIR Designer M have just been rolled into FIR Creator EX 1.7.0. Here’s a summary: More brands supported for IIR emulation. New ‘Biamp Tesira‘ & ‘Marani‘ IIR filter modes … Read More

User Feedback

FIR Designer bridges the gap between complex system measurements and the production of the filters used for equalization and enhancement.

System tuning involves sculpting of the impulse response. While often done with a drag-and-drop DSP, a more powerful approach is to use the IR itself to produce the corrective filters.

We can now fix anomalies that we once had to live with.
Pat Brown
Synergetic Audio Concepts, Pro Sound Training
FIR Designer is a great tool. 

The layout of the GUI and the workflow for developing loudspeaker presets are well thought out. 

The built-in utility for translating filter parameters between different manufacturer’s DSP platforms is an incredible time saver. 

The measurement averaging feature is indispensable, as is being able to define a target response, for truly optimizing a loudspeaker’s response.
Charlie Hughes
Biamp Systems
FIR Designer is the greatest piece of software to come to the pro-audio community in a decade.

The amount of man-hour time reduced is amazing moving from DSP to DSP. Every added IIR emulation makes it even easier to get a base system setup offline, before dialing in the house EQ on-site.

The last Jazz Ally job really proved the software out to the highest level. Ideal to have the workflow with the Symetrix DSP. Using good measurements, we did all the work inside FIR Designer offline; including IIR room corrections and FIR corrections for passive cabinets. Then it was just amazing to walk into the venue, plug it all in and achieve exactly our predicted spectrum around the room.
Mark DeArman
McCauley Sound
Nothing competes with FIR Designer’s UI and workflow. It’s a great tool!

The real-time preview enables parameter changes to be evaluated quickly.

Inbuilt measurement averaging is a helpful inclusion and the truly unique IIR filter conversion is really valuable when working across different processor brands.
Sam Feine
Sonos
(Eclipse Audio’s) FIR Designer software dramatically changes the equation for filter design in smaller spaces.

We’re able to take the required measurements and design the  FIR filter in less than an hour.

Its a profoundly powerful piece of software.
Ryan McCauley
RMS Acoustics
I use FIR Designer M. It’s ideal for preset creation, fixed install tuning or on-the-spot live event jobs. It improves the overall response of both ‘solo’ systems & larger set-ups involving multiple sources.

It’s possible to match the magnitude & phase response between different product lines (& different manufacturers), set limiters and set specific crossover slopes (including some very exotic filter slopes).
Timo Beckman
Timo Beckman Geluidstechniek (Sound-engineering)
FIR Designer facilitates complete tuning of a DIY 5-way speaker, both on and off-axis, in less than a day. It’s easy, fast & accurate…it rocks!

I import transfer functions or impulse traces (from Smaart, ARTA or REW) into FIR Designer, and literally a few minutes later have a FIR file to check out.

The workflow allows the tuning of individual driver sections to meet specific target responses – for example, complementary linear-phase crossovers – along with tying the drivers together with correct polarites, levels, & delays. It’s quick to make several sets of FIR files for each driver, with various possible crossover points. Final speaker tuning becomes a simple matter of choosing which set of crossover points give the smoothest measured off-axis responses.
Mark Wilkinson
DIY Speaker Builder