Creating a Circuit Board from Scratch

I've been dabbling with creating my own circuit boards for a while now. I recently used KiCad to design this audio DAC circuit board. I had the board manufactured by OSHPark and assembled it myself using a solder paste stencil and my DIY solder reflow oven.

CS4334 Audio DAC Breakout Board

The board plays audio using a typical 3…

Date: July 11th, 2021 at 10:24am
Author: Terence Darwen
Tags: Embedded, Audio, DAC, Cirrus Logic, CS4334, PCB, circuit board, KiCad, I2S, STM32, STM32F4, STM32F411, Audio Software

Cross-Platform Audio Analysis Tool

I've been working on an audio analysis tool, lately. Here's a screenshot:

AAT Screenshot on MacOS

One of my interests involves creating software algorithms that manipulate audio in various ways. This frequently involves analyzing various numerical data.

Tired with writing specialized scripts corralling specific data and…

Date: December 14th, 2017 at 2:47pm
Author: Terence Darwen
Tags: Audio Analysis Tool, Audio Software, Cross-Platform Development, Transient Detection, C++

My PhaseVocoder on GitHub

My PhaseVocoder project is now available on GitHub here. In addition to placing the project on GitHub I've also added some general documentation on how the phase vocoding process works. Please see this PDF for more information.

PhaseVocoder on GitHub

The PhaseVocoder uses CMake to build on various platforms. I've pers…

Date: September 15th, 2017 at 7:06pm
Author: Terence Darwen
Tags: Audio Software, Cross-Platform Development, Phase Vocoder, Transient Detection, Digital Signal Processing, DSP, C++

Phase Vocoder w/Pitch Shifting (Audio Examples and Free Software Download)

I've improved my Phase Vocoder application by adding in a resampler. Using the resampler in conjunction with my Phase Vocoder's existing time stretch/compress abilities allows for pitch shifting. Here's a demonstration:


The original version of my Phase Vocoder is described in detail here

Date: May 16th, 2017 at 1:46pm
Author: Terence Darwen
Tags: Audio Software, Cross-Platform Development, Phase Vocoder, Pitch Shifting, Digital Signal Processing, DSP, C++

Phase Vocoder w/Transient Handling (Audio Examples and Free Software Download)

I've improved my transient detection algorithm (original version described here) and have now included it in my Phase Vocoder application (original version of my Phase Vocoder described here). I'm pretty happy with the quality. Here's an audio example:


As mentioned in my previous post, p…

Date: April 19th, 2017 at 4:42pm
Author: Terence Darwen
Tags: Audio Software, Cross-Platform Development, Phase Vocoder, Transient Detection, Digital Signal Processing, DSP, C++