Re_Mole_10, October 26, Reaktor

(S)Low Frequency Orchestra together with Wolfgang Mitterer and Jérôme Noetinger

REAKTOR, Geblergasse 40, 1170 Wien, Austria
26.10.2020, 19:30

Zehn Jahre zu spät feiern wir die Veröffentlichung unseres Albums “Mole” und unterziehen es dabei einer Neubetrachtung.

“Mole” ist aus einer improvisatorischen “Kollision” hervorgegangen, einem ungeprobten und dennoch bühnenöffentlichen Aufeinandertreffen des Low Frequency Orchestra mit Wolfgang Mitterer. Über die Jahre seither blieben manche Eindrücke und Klänge in Erinnerung, vieles wurde vergessen, weiterentwickelt, abgerieben. Im REAKTOR nehmen wir den Faden wieder auf. Wieder wird die Aufführung als Kollision angelegt sein, mit einem weiteren Akteur, dem Tape-Künstler Jérôme Noetinger.

Das Neue ist auch immer ein Produkt des Alten.

artwork by Maja Osojnik

A cooperation between SKE, REAKTOR and Rotting sounds.

Low Frequency Orchestra
Angélica Castelló — Paetzold, tapes, radios
Maja Osojnik — Voice, Paetzold, electronics
Matija Schellander — Kontrabass
Thomas Grill — Electronics
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Wolfgang Mitterer — Electronics
Jérôme Noetinger — Revox, tapes, electronics

Panel discussion, musikprotokoll 2020 festival

Thomas Grill was invited to take part in a panel discussion together with Reni Hofmüller, Christina Kubisch and Fränk Zimmer, presented by Susanna Niedermayr (ORF Ö1 Zeit-Ton) and hosted by esc medien kunst labor. The festival theme “Hidden sounds” was illuminated from different directions, in our case in the context of the rotting sounds project and the acousmatic composition noise shaping Thomas has presented at the festival the day before.

“Noise Shaping” at Musikprotokoll festival, October 8, Graz

Aloïs Yang & Andreas Trobollowitsch / Rojin Sharafi / Thomas Grill @ Hidden Dome

Thomas Grill gibt mit Noise Shaping einen Einblick in das Forschungsprojekt rotting sounds, das sich mit der Vergänglichkeit von digitalem Klang im sozialen, technologischen und zeitlichen Kontext beschäftigt. Ein zentraler Forschungsgegenstand ist die Repräsentation von Klang als 1-bit-Datenstrom, der die Brücke zwischen digitalen und analogen Signalen schlägt. Der Begriff Noise Shaping steht dabei für den voluminösen Rauschhintergrund, der als Träger der darin verborgenen Klänge verwendet wird. Aloïs Yang and Andreas Trobollowitsch spannen mechanisch erzeugte Klänge in ein komplexes digitales Feedback-System ein; found objects kommen ebenso zum Einsatz wie natürliche Substanzen und performative Raumvermessungen. Und Rojin Sharafi, die ursprünglich aus dem Iran kommt und seit einigen Jahren in Österreich lebt, widmet sich in ihrem Stück der „kulturellen Hegemonie, kulturellen Hybridität und dem kulturellen Überleben“, jenen Stimmen also, die im Kampf um die kulturelle Vorherrschaft gezielt unterdrückt werden. Für ein immersives Klangerlebnis bei Hidden Dome sorgt die 50-Kanal Ambisonics Audioanlage des Dom im Berg, für die die drei Auftragswerke konzipiert wurden.

October 8, 19:30pm
Dom im Berg, Schloßbergplatz, A-8010 Graz

paper at IFC 2020

We will be presenting our work on 1-bit audio at the International Faust Conference 2020 taking place on 1.12.2020 and 2.12.2020 at the Maison des Sciences de l’Homme Paris Nord. Our presentation will be about the bitDSP faust library developed by Till Bovermann and Dario SanFilippo.

Performance at Sound Campus, Ars Electronica Festival Linz, September 11

Thomas Grill, Till Bovermann and Kathrin Hunze will perform “merge and dissolve”, an audiovisual performance concept in the SOUND CAMPUS program, part of the Ars Electronica Festival 2020.

This performance involves three interactants, two predominantly working in the audio domain (Thomas Grill and Till Bovermann) and one focusing on a visual counterpart (Kathrin Hunze). We generate and exchange streams of 1-bit audio, a signal representation with properties of both the digital and analog domain that we have already been investigating in the artistic research project “Rotting sounds – Embracing the temporal deterioration of digital audio” (FWF PEEK AR445-G24). With simple switchboard matrix devices, we channel such bit streams between the individual performers and through simple processing modules, like delays, logical operators, etc., generating feedback and interferences on the way. These phenomena are made audible and are also mirrored by a visual representation of particle streams, forming directed jets and point cloud aggregations.

11. September 2020 – 20:10 – 20:35
Hauptplatz 6, Glashörsaal D (H6.DG.04)
4020 Linz, Austria

1-bit audio: Testing audio hardware

For an upcoming performance at the Ars Electronica Festival 2020 SOUND CAMPUS, we are testing hardware to interconnect 1-bit audio streams.

For that purpose, we are using an STM32F4 Discovery Board to generate 1-bit audio streams, sent through a Future Sound Systems MTX9 point pin matrix (Figure 1) as often found in modular synthesis systems.

The software used on the STM board to efficiently generate 1-bit audio streams using DMA transfer over an SPI interface is an offspring of our DADA hardware development efforts.

Figure 1: Testing Future Sound Systems MTX9 with high-bandwidth audio signals

The FSS MTX9 can be used as passive hardware (only 1-to-1 connections), or using the MTX9A buffer board to sum over input busses.

In passive mode (Figure 2), the bandwidth is sufficient to come close to 1 MHz bit rate which allows 32-fold oversampling at usable PCM audio rates.

Figure 2: Oscilloscope screenshot of MTX9 output (purple) against 1-bit audio input (turquoise) at around 500 kHz bit rate

For active mode (using the buffer board MTX9A, Figure 3), the hardware introduces low-pass filtering, reducing the audio bandwidth to around 100 kHz. This is good enough for high quality analog audio, but not for 1-bit digital audio at high bit rates.

Figure 3: Oscilloscope screenshot of MTX9A output (purple) against 1-bit audio input (turquoise) at around 100 kHz bit rate

Clearly, it must be noted that the summing function over inputs is not strictly meaningful for 1-bit signals, where some kind of post-processing needs to bit applied to return to single bits.

Dust a bit – recordings

The audio-laser installation dust a bit by Klaus Filip is the first of our installations, which – over the duration of more than a year – has eroded to a state which would be commonly described as “broken”, at least from the standpoint of the original concept.
The audio signal is not modulated onto the laser any more, as intended – what is heard is purely collected, amplified noise.

At this point, we will not attempt to repair it because it is already scheduled to upgrade the installation to a fully digital version on the basis of our custom 1-bit audio hardware DADA. We expect this to happen at the end of June 2020.

In the last year, the installation has been restarted a couple of times because the carefully calibrated laser beam tends to wander out of focus by the time. This is most probably due to temperature changes and/or vibrations, causing the mirrors to lose their precise adjustment.

We have prepared timelapse recordings of the sonic developments of the several installation runs – every time several weeks of collecting “dust”. One minute of a time lapse corresponds to a day of operation. Technically, the recordings are concatenated (and cross-faded) 1-minute snapshots taken every 12 hours. The naming of the recordings corresponds to their starting date. Enjoy!

2019-05-07 2019-08-21 2019-09-20 2019-11-07

“gestern-heute-morgen in der Konservierung” – Verrottende Klänge bei der Tagung des Österreichischen Restauratorenverbandes

At the annual conference of the austrian restorers association the rotting sounds were represented by Almut Schilling, discussing the <patina> as fundamental part of all preservation processes and opens valuable points of views to think about digital aesthetics of temporal deterioration.

6.-7.03.2020 Salzburg

do trans-Art_44 performance, February 13

Rotting sounds will be guest at the trans-Art series organized by Astrid Rieder. Thomas Grill will perform “musical materials”, in this case a worn concert zither explored with digital music signals.

trans-Art is a real-time dialogue between two or more artists. It breaks through conventional boundaries between different genres of art and enables a deeper understanding and reception of abstract art on several layers. (Astrid Rieder)

Thursday, February 13th at 7:30pm
studio Bundesstraße 37, in Wals-Siezenheim.

Art’s birthday 2020

We had a great evening at the Kunstradio Art’s Birthday Party! The audio CDs we produced live were given away as presents to the audience, hopefully delighting Art too.

Our performance is aired on Kunstradio-Radiokunst, radio ORF Ö1 on February 26 2020 11pm.