In my last post I showed how I used a neural network for a latency-free De-Feedback audio-plugin for live-applications. But as an electrical engineer for power electronics I was curious about how to use neural networks in control-algorithms. Why using neural networks in control-loops? Most of the time a simple proportional- and integral-control (PI-controller) is…
Since November 2022 AI is present in the mainstream: OpenAI published the LLM ChatGPT. Around three years later AI is everywhere: image- and video-generation, translations, audio-plugins and much much more. Hard to believe, but I got in touch with AI 17 years before ChatGPT has been released. During my studies of electrical engineering around 2005,…
The X32 has been around since 2012. But so far, there are no details on how signal processing is carried out in the mixing console. In this video, I would like to give you some insights into the reverse engineering that has been carried out so far. Over the past few months, we have been…
Together with some students and a colleague I took part at the International Future Energy Challenge (IFEC) in 2024. It was a great opportunity to combine my interest on power-electronics, audio-technology and microcontrollers. The topic of this competition was to create a Class-D-Amplifier with three channels and 135W output-power – per channel. Origin of the…
In mid-2010s I’ve spent weeks on comparing different topologies for inverters and DC/DC-converters for PV-applications. One of these topologies was quite interesting as it had a surprise when calculating the equations for the duty cycle. Under specific circumstances this duty cycle went from a positive real value into a complex imaginary value. To understand why…
In 2023, I published a video on my YouTube channel about reading and processing the Behringer UltraNet protocol (see YouTube: Hacking Behringer’s Ultranet for an FPGA-based DIY audio mixer). in this blog post I’d like to take a bit more time to describe the background and the connection between the UltraNet device, FPGA, and the…
During my time as a scientific researcher at the University of Kassel, I worked on a couple of very different types of laboratory test-devices to check if a theoretical idea is working or not. Most of the time we designed not a very fancy and good looking device, but a functional PCB with the main-components…
This file calculates a theta-angle-signal based on the given frequency-information:
FPGAs are very useful when calculating plus or minus or dealing with large logic-vectors. Even multiplication is fine. But when it comes to dividing signals, FPGAs need support. Lothar Miller has a nice implemenation of a Radix-2-procedure to calculate the division of two fixed-point-numbers:
To convert a 6-phase signal into a 90° system, the following logic can be helpful:
