Bach Note Transition Frequency “Music”

What are the note frequencies of music by Bach?  That is, “How often does an F follow a C?” etc.  What does it sound like if you “reconstruct” playable music from these frequencies? Let’s see! First, we find some Bach MIDI.  I chose Jesu Joy of Mans Desiring. Next, we feed that to my note-transition […]

Bach Chorale Diversity

What is the relative statistical diversity of Bach chorale harmonisations? Ever since I stumbled upon this Bach Choral Harmony Data Set I’ve been wanting ways to analyze it! So I set out to do just that today with the Shannon Diversity Index with this handy perl code:

First off (above), is the standard perl […]

Visualization of Led Zeppelin Lyrics with R

What can be known about Led Zeppelin lyrics from the standpoint of a computer geek? First, I collected and properly named every song with lyrics, with the power of perl and persistence. Then I found/crafted some R code to process these into a few graphics.

Weighted Graph “Music”

Code: synch-weighted-randomized   This piece was constructed in 4-bar increments by running the above code and importing the generated phrases (MIDI file) into my DAW (Apple Logic).  I then gave the patterns “better” patches, used layers and added a drum track for continuity. The code uses randomly generated weighted graphs to build up a melody […]

Musical Random Walks Over Weighted Graphs

tl;dr: https://github.com/ology/Music/blob/master/random-walk In this post, I illustrate a simple technique in Perl 5 to perform random walks over (node-edge) graphs, adding the named, “semantic” vertices to a MIDI score. The image on the left is not generated by the random-walk program, but is just a related illustration. :-) OK – on with the code! First, there […]

Growing Melodies

Ever since I heard about evolutionary programming, I’ve wanted to try it with music.  On a recent weekend, I finally did just that! Some generated melodies are lovely in spurts but betray their purposlessness.  …Some just sound like Metroid on drugs. The code is here: https://github.com/ology/Music/blob/master/bitstring-fitness Update with less dependencies: https://github.com/ology/Music/blob/master/ai-genetic

Musical Deltahedra

One day I became curious about musical triads (three note chords) as geometric triangles. I speculated about the actual sizes of the sides, given the intervals between the notes at the corners. Then, in no time, I was off day-dreaming about wobbling, vibrating triangles and string theory…