Joy Division‘s first album Unknown Pleasures has long had one of the most iconic covers of the twentieth century. Serious JD fans know that Peter Saville designed the cover based on an image that Bernard Sumner had found in The Cambridge Encyclopaedia of Astronomy of radio waves from pulsar CP 1919.

Someone named Garrett Finucane has created an Unknown Pleasures waveform generator on Github. Here is some sample output:
 

 
You can clear it and make your own patterns on a field of more or less parallel horizontal lines, which will probably come out more unruly. I made one where the pattern resembles an upside-down cross:
 

 
Here’s the full album to listen to while you play with it:
 

 
via John Coulthart

Previously on Dangerous Minds:
‘Unknown Pleasures’: The story behind Joy Division’s iconic album cover