Sigma-Delta Modulators

In 2024 I spent some time to find a good solution to convert digital audio to analog signals. I ended up using different types of sigma-delta-modulators with different orders and tested multiple configurations. The following implementations contain the most promising solutions for the Class-D-Amplifier we built up at the University of Kassel in 2024 for…

16-channel LED PDM-Controller

While reverse engineering the Behringer P16-I I’ve found a nice thing: this devices has 32 individual LEDs at the front to display the audio-level and the clipping of a channel. But from the internal FPGA only three lines are connected to the front-leds. So I hooked up an oscilloscope and found out, that the signal…