### Pole-Zero analysis in Python with SciPy

-- Jul 19, 2024

I’m currently working on Introduction to Digital Filters By Julios O. Smit III. There’s some Matlab code for pole-zero analysis and plotting. I don’t think it makes a lot of sense to convert this to Python though, so this is me investigating what is available in SciPy. Continuous-time Linear Systems This part of the scipy.signal module seems to be where the interesting stuff is happening. There is an lti base class which can be instantiated with a different number of arguments:

### Simulated Sine-Wave Analysis

-- May 28, 2024

This is based on the scripts from Introduction to Digital Filters.

Let’s figure out the frequency response of the *simplest lowpass filter*:

$$ y(n) = x(n) + x(n-1),\quad n=1,2,…,N $$

We do this using *simulated sine-wave analysis*. This approach complements the analytical approach from the book.

### "Simplest Lowpass Filter" in Python

-- May 15, 2024

I'm currently working my way through ```
Introduction to Digital Filters with Audio
Applications
```

by Julius O. Smith III. The first section deals with what the book
calls the *simplest lowpass filter*. After the initial mathematical introduction
(both via tedious trigonometry and a complex approach) there's an actual
implementation. The book uses Matlab, but I much prefer Python for this type of
job even though I should probably use GNU Octave for this job but I really
prefer Python. These are the notes I took when converting that initial script.

### FFT in C

-- Mar 31, 2024

I've been on a deep dive into DSP (Digital Signal Processing). Mainly because I want to know how audio effects work. I started with a book about programming VST (Virtual Studio Technology) plugins. Though I quickly found out that the DSP course I took at university was a bit too long ago, so I had to go back to basics.

### New Years Resolutions

-- Jan 31, 2024

The new year is already well underway and I've got a couple of things I want to accomplish this year. Usually I just maintain this list in my head, but this year I figured I'd write them down and make the Internet my accountability buddy. Technological projects I've recently had a pretty big change at work, moving into the role of software architect. This means I spend a lot more time in meetings and way less time actually in the driver seat doing some coding.

### Compile-time git version info using CMake

-- Apr 6, 2023

I recently found myself wanting to get some insight into what exactly went into
a given binary that we deployed on an embedded system. As a first step I wanted
to get the commit hash for the `HEAD`

of the branch from which it was built.