Tag Archives: supercollider

Re-interpreting history

A script for sniffing bits of supercollider code being broadcast as livecoding history over a network and re-interpreting them as objects in fluxus, written during an excellent workshop by Alberto de Campo and Julian Rohrhuber at /*VIVO*/ Mexico City.

(osc-source "57120")

(define (stringle str)
        (string->list str)))

;;(osc-destination "osc.udp:")
;;(osc-send "/vivo" "s" '("fluxus:hola"))

(define (safe l n)
    (list-ref l (modulo n (length l))))

(define (render arg)
    (let ((l (map (lambda (t) (/ t 255)) (stringle arg))))
            (scale (vector (safe l 0)
                    (safe l 1)
                    (safe l 2)))
            (rotate (vmul (vector (safe l 32)
                    (safe l 12)
                    (safe l 30)) 360))
            (colour (vector (safe l 0)
                    (safe l 3)
                    (safe l 4)))

            (build-torus 0.1 1 4 20))))

(scale 2)
;;(render "hello 343 323")

        (when (osc-msg "/hist")
            (printf "~a~n" (osc 1))
            (when (osc 1)
                (render (osc 1))))))

Mexican livecoding style

At only around 2 years old, the Mexican livecoding scene is pretty advanced. Here are images of (I think) all of the performances at /*vivo*/ (Simposio Internacional de Música y Código 2012) in Mexico City, which included lots of processing, fluxus, pure data and ATMEL processor bithop along with supercollider and plenty of non-digital techniques too. The from-scratch technique is considered important in Mexico, with most performances using this creative restriction to great effect. My comments below are firmly biased in favour of fluxus, not considering myself knowledgeable enough for thorough examinations of supercollider usage. Also there are probably mistakes and misappropriations – let me know!

Hernani Villaseñor, Julio Zaldívar (M0M0) – A performance of contrasts between Julio’s C coded 8bit-shifting ATMEL sounds and Hernani’s from scratch supercollider scripts, both building up in intensity through the performance, a great opener. A side effect of Julio using avrdude to upload code resulted in the periodic sonification of bytecode as it spilled into the digital to analogue converter during uploads. He was also using an oscilloscope to visualise the sound output, some of the code clearly designed for their visuals as well as crunchy sounds.

Mitzi Olvera and Alejandro Franco – I’d been aware of Mitzi’s work for a while from her fluxus videos online so it was great to see this performance, she made good use of the fluxus immediate mode primitives, and started off with restricting them to points mode only, while building up a complex set of recursive patterns and switching render hints to break the performance down into distinct sections. She neatly transitioned from the initial hard lines and shapes all the way to softened transparent clouds. Meanwhile Alejandro built up the mix and blasted us with Karplus Strong synthesis, eventually forcing scserver to it’s knees by flooding it with silent events.

Julian Rohrhuber, Alberto de Campo – A good chunk of powerbooks unplugged (plugged in) from Julian and Alberto, starting with a short improvisation before switching to a full composition explored within the republic framework, sharing code and blending their identities.

Martín Zumaya (Stereo Vision), José Carlos Hasbun (joseCaos) – It was good to see Processing in use for livecoding, and Martin improvised a broad range of material until concentrating on iconic minimal constructions that matched well with José’s sounds – a steady build up of dark poly-rhythmic beats with some crazy feedback filtering mapped to the mouse coordinates to keep things fluid and unpredictable.

IOhannes Zmölnig – pure data morse code livecoded in Braille. This was an experiment based on his talk earlier that day, a study in making the code as hard to read for the performer as the audience. In fact the resulting effect was beautiful, ending with the self modification of position and structure that IOhannes is famous for – leaving a very consistent audio/visual link to the driving monotonic morse bass, bleeps and white noise.

Radiad3or (Jaime Lobato, Alberto Cerro, Fernando Lomelí, Iván Esquinca y Mauro Herrera) – part 1 was human instruction, analogue performance as well as a comment at the inadequacy of livecoding for a computer, with commands like “changeTimbre” for the performers to interpret using their voices, a drumkit, flutes and a didgeridoo. Following this, part 2 was about driving the computer with these sounds, inverting it into a position alongside or following the performers rather than a mediator, being reprogrammed by the music. This performance pushed the concept of livecoding to new levels, leaving us in the dust still coming to terms with what we were trying to do in the first place!

Benoît and the Mandelbrots (live from Karlsruhe) – a remote performance from Germany, the Mandelbrots dispatched layers upon layers of synthesised texture, along with their trademark in-performance text chat, a kind of code unto itself and a view into their collective mind. The time lag issues involved with remote streaming, not knowing what/when they could see of us, added an element to this performance all of it’s own. As did the surprise appearance of various troublemakers into the live video stream…

Jorge Ramírez – another remote performance, this time from Beijing, China. Part grimy glitch and part sonification of firewalls and effects of imagined or real monitoring and censorship algorithms this was powerful, and included more temporal disparity – this time caused by the sound arriving some time before the code that described it.

Si, si, si (Ernesto Romero Mariscal Guasp y Luciana Renner Maceralli) – a narrative combination of Luciana’s performance art, tiny webcam augmented theatre sets, and Ernesto’s supercollider soundtrack. Livecoding hasn’t ventured into storytelling much yet, and this performance indicated that it should. Luciana’s inventive use of projection with liquids and transparent fibres reminded me of the early days of film effects and was a counterpoint to Ernesto’s synthesised ambience and storytelling audio.

Luis Navarro, Emilio Ocelotl – ambitious stuff this – dark dubsteppy sounds from Emilio, driving parameters of a from-scratch fluxus sierpinski fractal exploration from Luis. Similar to Mitzi’s performance, Luis limited his scene to immediate mode primitives, a ternary tree recursion forming the basis for constantly morphing structures.

Alexandra Cárdenas, Eduardo Obieta – Something very exciting I noticed was a tendency when working in sound/visual pairs such as Alexandra and Eduardo for the sounds to be designed with the visuals in mind – e.g. the use of contrasting frequencies that could be picked out well by fft algorithms. This demonstrated a good mutual understanding, as well as a challenge to the normal DJ/VJ hierarchy. Eduardo fully exercised the NURBS primitive (I remember it would hardly render at 10fps when I first added it to fluxus!) exploding it to the sound input before unleashing the self-test script to end the performance in style!

Eduardo Meléndez – one of the original Mexican livecoders, programming audio and visuals at the same time! Not only that – but text (supercollider) and visual programming (vvvvv) in one performance too. I would have liked to have paid closer attention to this one, but I was a bit nervous

Slub finished off the performances, but I’ll write more about that soon as material comes in (I didn’t have time to take any photos!).

SuperCollider Symposium

I had a great couple of days at the SuperCollider symposium, starting with a gameboy performance with Till Bovermann and ending with a talk on BetaBlocker with him and Tom Hall. As an outsider to the community (I have contributed code, but I’m not a regular user of Supercollider) it was interesting to pick up on the threads and burning issues of the scene.

Our performance went well, and I found it oddly satisfying to continually dismantle all repetitive dancable structures as they emerged in order to keep up with Till’s more fluid style. We were both running the Betablocker virtual machine, but using it in very different ways – I was running a single one at 4 or 5 cycles per second inside the DS, Till was running many at 44100 cycles per second inside Supercollider.

Photos by Steve Welburn

I also had a chance to experience Benoit and the Mandelbrots for the first time – both in livecoding performance and finding out more about their software during their talk. It seems that livecoding is very active with a lot of new approaches being tried – for example extensive use of text chat for communication during performances. Also I found out about BeeNoir an amazing hexagonal beehive sound installation made by the Mandelbrots which was inspired by Al Jazari!

One of the hightlights of the event was Takeko Akamatsu of CraftWife fame initiating a 5 minute code-off competition between Click Nilson, MCLD, redfrik and Juan Mandelbrot (including a fully loaded water pistol) during her keynote talk.

You can read about some of the other things at the conference on this BBC article. Thanks to Dan Stowell and the team for all the hard work putting on the symposium.

Betablocker @ SC2012 livecoding night

I’m travelling to London this weekend to appear as a guest performer with Till Bovermann at the SuperCollider Symposium livecoding night, alongside livecoding all stars Benoit and the Mandelbrots, Thor Magnusson, Alo Allik and Yota Morimoto.

Till and I will be collaboratively performing using the betablocker virtual machine, Till running it at audio rate inside Supercollider, while I’ll be livecoding it at much slower beat time on a GameBoy DS – projecting it’s screen via close up webcam.