Stephen Morris (@stephenm)

Stephen Morris is an independent writer/consultant based in Ireland. Widely experienced in enterprise development and networking applications, Stephen has worked for some of the world's biggest networking and finance companies, has a master's degree in computer science and holds a number of patents.

Exploring Human Hearing Range

Stephen Morris October 31, 20204 comments
Human Hearing Range

In this post, I'll look at an interesting aspect of Audacity – using it to explore the threshold of human hearing. In my book Digital Signal Processing: A Gentle Introduction with Audio Examples, I go into this topic and I include a side note on the amazing hearing range of our canine companions.

Creating a Test Audio File

Audacity allows for the generation of a variety of test signals. If you click the Generate->Tone menu, it looks something like...


Digging into an Audio Signal and the DSP Process Pipeline

Stephen Morris March 9, 20206 comments
In this post, I'll look at the benefits of using multiple perspectives when handling signals.A Pre-existing Audio File

Let's say we have an audio file of interest. Let's load it into Audacity and zoom in a little (using View → Zoom → Zoom In, multiple times). The figure illustrates the audio signal: just a basic single-tone signal.

By continuing to zoom into the signal, we eventually get to the point of seeing individual samples as illustrated below. Notice that I've marked one...


A Free DSP Laboratory

Stephen Morris December 18, 2019
Getting Started In Audio DSP

Imagine you're starting out studying DSP and your particular interest is audio. Wouldn't it be nice to have access to some audio signals and the tools to analyze and modify them? In the old days, a laboratory like this would most likely have cost a lot of time and money to set up. Nowadays, it doesn't have to be like this. The magic of open source software makes it quite straightforward to build yourself a simple audio DSP laboratory – just use the brilliant...


Re: MSc Digital Audio Engineering Project Idea

Reply posted 3 years ago (01/12/2020)
Hi there TappedtimaIt's always difficult choosing a research topic! Not sure if you've experimented with any reverb toolkits. It might be useful to look at the Audacity...

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