What would a typical optimization approach look like?

Two things are needed as a basis for FIRmaker optimization:

  • FIRmaker enabled, high-resolution loudspeaker data "GLL"
  • The definition, "model" of the venue to optimize the setup to.

The loudspeaker data is provided by your loudspeaker manufacturer. The model of the venue is defined by you. - AFMG provides the EASE Focus 3 software for this purpose. Different criteria can be defined in your setup. Mainly, these will be audience areas to aim the sound to and exclusion areas that FIRmaker will try to avoid sound from going to.

How do I get the FIRmaker results into my DSPs?

Support for different DSP platforms is rapidly growing. Currently it is already possible to export CSV and other, general filter types and to save them to files. These can be imported into your DSPs.

More and more DSP manufacturers work together with AFMG to enhance the integration of FIRmaker with their platforms. (Please see "Supported Brands / Supported DSP Platforms" for a comprehensive list.) At a final stage, these implementations will support a direct transfer of system setups and FIR filters between the controller software and FIRmaker.

Does it make sense to use FIRmaker with an array driving two or more loudspeakers with one amplifier?

Many modern arrays and especially column loudspeakers already integrate amplifiers and DSPs directly into the cabinets. For such systems, FIRmaker optimization is tailor made. However, many other existing systems employ amplification and processing in separate components. In many cases an affordable hardware solution will be driving two, three or even four cabinets with one amplifier channel. Consequently, only one DSP channel will be feeding the signal to several cabinets at once.

Which loudspeaker types can be optimized by FIRmaker?

The FIRmaker algorithm generally supports optimization of basically any array of loudspeakers. Currently, line arrays and steerable column loudspeakers as well as custom loudspeaker clusters are implemented within the tuning approach in EASE Focus 3.

A prerequisite for the optimization of specific types of loudspeakers will be that the manufacturer has purchased a FIRmaker license.

Can I still control the perceived sound quality when FIRmaker optimization is applied?

Yes, absolutely! You might even notice that your applied EQ will produce more consistent results throughout the whole venue than you have been used to before.

The reason for this is simple. FIRmaker is a  set of numerical algorithms able to optimize your system's performance. "Optimization", in this sense and within the parameters you set, attempts to tune the system for...

Can all brands of loudspeakers be optimized by FIRmaker?

FIRmaker is a technology, a set of algorithms specifically developed by AFMG to be an open solution available to all loudspeaker manufacturers. AFMG believes that it makes sense to support open platforms instead of every manufacturer developing a costly, proprietary solution by himself. This way, AFMG software is available at very competitive prices or even for free while providing a large set of features and the highest quality simulations available in the market.

How do I measure speech intelligibility with EASERA?

In EASERA almost any evaluation and measure can be derived directly or indirectly from loaded or measured impulse response data. The same is true for most of the intelligibility measures.

EASERA allows for calculating STI, STI (Male), STI (Female) as well as AlCons and the equivalent STIPa. Note that these values are all calculated from the modulation transfer function (MTF), which in turn originates in the impulse response.

Can EASERA perform distortion measurements?

Yes, it can.

EASERA implements a new method of measuring nonlinearities in the response of a system. By utilizing a pink sweep as an excitation signal, all of the distortion components are located at the end of the impulse response and can be separated by windowing.

After some post-processing the individual harmonic frequency responses can be viewed and even THD in a high frequency resolution can be computed. Of course also the K2, K3 K.. spectra are available.

Ahnert Feistel Media Group

Located in Berlin, Germany, AFMG® Technologies GmbH has created the industry standards EASE and EASERA software for acoustic simulation and measurement as well as their related products EASE Focus, AFMG SysTune, EASE Address and EASE SpeakerLab.

In cooperation with our partner company SDA Software Design Ahnert GmbH we develop and distribute software for:

Electro-acoustic and
room-acoustic modeling
Electronic and acoustic
Applications in
engineering and physics
RF and infrared

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