Archive for December, 2013

Spectrograms with Overtone

Posted: December 22, 2013 in Uncategorized

spectrograms are fascinating: the ability to visualise sound in terms of its constituent frequencies. I’ve been playing with Overtone lately, so decided to create a mini-library to produce spectrograms from Overtone buffers.

Here’s a sample output:


This particular image is a visualisation of part of a trumpet fanfare. I like it because you can clearly see the punctuation of the different notes, and the range of strong harmonics above the base note. Read on for some more details on how this works.


Enter The Matrix

Posted: December 7, 2013 in matrix
Tags: , , , ,

This was a presentation I gave at the 2013 Clojure Conj, focusing on core.matrix and related libraries.