This is our second post going over the Audiotec Fischer Helix, Brax, or Match DSP software. For this second video, we are focusing on the  Helix DSP software Setup, Input EQ, summing, Automotive Time, Measurement Tune EQ, and more!

Please note that the software used is the V5.00.05, so some things may change as they update the software, which they regularly do. 

Helix DSP Input EQ – The input EQ on the Audiotec Fischer DSP PC Tool software is the most powerful available. In this software version, it features up to 5 bands of parametric, shelf, and all pass filter equalization, as well as per-channel input delay.

Summing – Combining multiple inputs per output to acheive a full-range stereo signal and using the basic input RTA.

Automatic Time Measurement – In this video we go over how to use the Audiotec Fischer PC Tool feature that automatically and accurately sets time alignment for you.

Audiotec Fischer Tune EQ – We also go over how to use the Tune EQ automatic EQ feature. 

If you have any specific requests on tech tips regarding the Audiotec Fischer DSP PC Toll Software, or anything else related to car audio or sound treatment, please email us with a request. Thank you!

       This is going to be our first post going over your Audiotec Fischer Helix, Brax, or Match DSP product. For this first video, we are focusing on the initial Helix DSP software setup and configuring the inputs and outputs. Please note that the software used is the V5.00.05, so some things may change as they update the software, which they regularly do. 

Inputs and Output Menu: This will the first menu you have to set up in your Audiotec Fischer Helix, Brax, or Match DSP. It is also one of the most confusing for new users. In this video we go over how to use it, its capabilities, and more.

Virtual Channels: Virtual channels are essentially “a DSP within your DSP” and is another function of the Audiotec Fischer products that is often misunderstood.

Signal Management: The signal management tab is where you will designate how your input switching behaves.  

What Is Speaker Modeling Software? What is WinISD? 

       WinISD is a free software program designed for speaker design and optimization. The software allows users to create and simulate different speaker and subwoofer enclosure designs, and analyze their acoustic performance.

       WinISD provides a variety of tools and features to help users create optimized speaker designs. For example, users can input the parameters of their chosen driver, such as the Thiele-Small parameters, and the software will calculate the optimal box size and port tuning frequency based on the selected design.

       The software also includes graphical analysis tools, which allow users to see the predicted frequency response and impedance curve for their selected design. This can help users optimize their designs for specific applications, such as home theater or car audio.

       In addition, these modeling softwares can simulate different types of speaker enclosures, including sealed, ported, and passive radiator designs. The software calculates the predicted performance of each design, allowing users to compare and choose the optimal design for their intended use.

       Overall, WinISD is a powerful tool for designing and optimizing speaker systems, particularly subwoofers. Its flexible and user-friendly interface makes it an ideal choice for hobbyists, DIY enthusiasts, and professionals alike who are interested in designing high-quality and optimized speaker systems.

What can we use WinISD for in Car Audio specifically?

       For my purposes of designing and installing high-end car audio systems, I use winisd for a few things. Using its many features, I can determine what I can determine which subwoofer and midbass drivers are best for a specific application. Or, I can simply figure out what size enclosure a driver needs and how much power it’ll be able to handle mechanically. The video below shows how I use WinISD to determine which driver is more suited for a specific application.

Things To Keep In Mind About Speaker Modeling Software..

       Remember, WinISD is ONLY a loudspeaker modeling software. The way this software works is it uses the TS Parameters to mathematically plot its behavior in a theoretical anechoic environment. TS parameters will only tell you how a speaker behaves at and near its resonant frequency. Modeling software does NOT tell you how a loudspeaker sounds as far as its distortion performance or its actual frequency response caused other aspects of the speaker. It also does not tell you how it’ll behave in your given room. 

TLDR, do not use WinISD as an ultimate decider on what speaker is better than another. “Better” can have many different meanings. 

Download WinISD

WinISD Alpha Pro (what I personally use)

WinISD Beta

       Hey everyone, I’m starting a blog to share various tech tips and useful information. For my first post, I decided to make an old video of mine available again. In this video, I demonstrate how to measure phase quickly and easily verify phase for maximum cohesion through a crossover. This is done using nothing but an RTA, All Pass Filters, and the Phase Slider on my Helix DSP. Additionally, I measure the results with Room EQ Wizard and a USB Measurement Microphone. Although I used a Helix DSP for this demonstration, it’s an older video, so some things may look a bit different. Furthermore, the video includes my old company’s intro.

       Keep in mind: this method is only for even-order Linkwitz-Riley crossovers. A perfect LR crossover will be rolled off 6dB at the crossover point. The two will sum perfectly flat to 0dB. So, a perfect LR crossover will sum + 6dB. 90 degrees out of phase LR crossovers will sum 3dB. 135 & 225 degrees will sum with no change. 180 degrees out of phase will result in a null. With this simple process, you can measure and improve phase in your sound system.