In november 2013 I was invited to participate into piksel fesival to do an audiovisual performance using exclusively the "raspberry pi" linux computer. When No-nerd friends heard that I was going to perform with a "raspberry pi" (think about the pronunciation now) they thought about something totally different....

This is the text I wrote for the catalog:

Screens have been associated to computers since quite some decades..
This made sense during long time due to the nature of the output from the computer process, that was usually a number, a text file, an image, a generated graphic, etc.

in the last decade most of us have experienced a big change in speed and affordability of the computers that brought together the possibility of performing audio and video in real time.
then, the output of the computing process stops being just something that you see in your personal screen and becomes something more physical, like sound or projected moving images (among many other things).

this performance focuses on how the lack of a screen in computer music, allows for a more natural and musical interaction with the systems. Sometimes it's nice to have some feedback. sometimes it's even necessary but when not. having to stare at a screen has totally negative effect over the performance. Also, just some pulsating leds can give enough feedback in most of the cases. Not having a screen. brings the performance closer to a real "concert" in which you are focusing on your instrument, the audience and in what you are hearing.

To complement this performance, real time, full-HD graphics will be generated in one of the boards.
Very simple moving graphics reacting to the audio will show this negative "mesmerizing" effects of bright lights in movement...

more info on how the looper works:
roll your own looper (link)