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Draw waveforms and hear them
Posted ten years ago
A while back I thought it would be interesting to be able to draw arbitrary waveforms and then listen to how they sound. I had an audio engine just laying around, so I whipped up a quick application to do that.
download WaveStudio.exe
Results
In theory, you can make any sound that you want. The results aren't very interesting. You can draw a sine wave and it sounds muffled. Add some jagged edges and the sound starts to sound more raw and high pitched. But it's okay to demonstrate what a sawtooth vs. sine vs. square wave sound like.
Future work
It would be a better to be able to draw in the time vs. frequency domain, using standard brush painting tools. Thay way you could come up with more interesting waveforms.
Fast and Easy Levenshtein distance using a Trie
If you have a web site with a search function, you will rapidly realize that most mortals are terrible typists. Many searches contain mispelled words, and users will expect these searches to magically work. This magic is often done using levenshtein distance. In this article, I'll compare two ways of finding the closest matching word in a large dictionary. I'll describe how I use it on rhymebrain.com
My favourite Google Cardboard Apps in 2017
I have never been a gamer. The most I've played was Super Mario Bros (the original). I then took a break for a decade or two and spent a few weeks with Simcity 4. All that changed when I got Google Cardboard.
The simple and obvious way to walk through a graph
At some point in your programming career you may have to go through
a graph of items and process them all exactly once. If you keep following neighbours, the path might loop back on itself, so you need to keep track of which ones have been processed already.
Five essential steps to prepare for your next programming interview
They put you in a room, give you a problem, and stare at you while you fumble around with markers on a whiteboard for 45 minutes. With a little preparation, you'll look like a pro.
Succinct Data Structures: Cramming 80,000 words into a Javascript file.
jQuery creator John Resig needs a little help storing lists of words in his side project. Let's go overkill and explore a little known branch of computer science called Succinct Data Structures.
Cell Phones on Airplanes
Much ink has been spilled about the use of cell phones on airplanes. Here's the truth, which will be disappointing to conspiracy theorists: Cell phone signals most definately have an effect on other electronic equipment. Read on for more.