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2D triangulation-based spatialisation approach

2019-03-02

2D Delaunay spatialisation in Max from Trond Lossius on Vimeo.

This is a demo of some Java code I have been developing recently that offers an alternative spatialisation approach to DBAP for arbitrary 2D loudspeaker configurations. It is intended for installaiton setups with speakers distributed/scattered in ways that breaks with the common “sweet spot” assumption.

It uses Delaunay triangulation and distributes sound to the three speakers of the current triangle with constant amplitude. On the edges between triangles spatialisation folds down to standard constant intensity panning between the two speakers at the end points of the edge.

While DBAP uses all of the speakers all of the time, this approach uses only the three nearest speakers surrounding the source point.

Credits:

The idea for this implementation came up in a conversation I had with Ville Pullki some years ago in Helsinki. The java code is based the cataLib by Jão Menezes. His code is again based on earlier code by Yoshihito Yagi.

Testing Aalto COMPASS ambisonics decoder

2019-02-09

There has been quite a bit of development of higher-order ambisonics plugins in recent years. Today I have been testing the latest version of the COMPASS recorder that comes as part of the SPARTA plugins fro Aalto University. SPARTA is short for Coding and Multidirectional Parameterisation of Ambisonic Sound Scenes, a somewhat similar approach to the Harpex plugin.

Below is a binaural rendition of some tests I have done today.

I have a mono source (Butterfly by Grieg) encoded using Blue Ripple the Shoebox. Thjis encodes with distance clues and early reflextions emulations within a shoebox space. In addition I am using the BlueRipple Reverb, but with early reflextions disabled (as they are already taken care opf by Shoebox).

Decoding is done using COMPASS. I have set it up to work with 16 speakers according to the setup at my studio, and here I’m doing a virtual binaural endition of what it sounds like over those 16 speakers.

Please listen using headphones. I am continuously moving the sourcve around within the shoebox space as can e seen in the purple plugin interface at bottom left.

The Atmospherics at Entrée

2019-02-07

A-7

Trond Lossius & Jeremy Welsh
The Atmospherics – River deep, mountain high
Entrée Gallery, Bergen-

February 7 – 17 2019
Thursday – Sunday
open: 5 – 8.30pm (loop)

The Atmospherics is one of the ongoing collaborative projects of Trond Lossius and Jeremy Welsh. Through field recordings they capture unique qualities from different natural landscapes and urban areas. The recorded audio and video material is then filtered, edited, modified and mixed to highlight some characters or to mute others. The intention is not to document the sites, but rather to build a database of audiovisual material that is combined in different ways in their installations, where each assembly becomes a “temporary place”, constructed of impulses from different geographical areas.

Since 2014, the project has moved from Bergen, Trondheim, Arendal, Førde, Utne and Campania, Italy, where it has been presented in various installations with multi-screen video and multi-channel audio. The new video adapted to the cinema format, which premieres at Entrée, summarizes this entire project, and combines material from all the different phases and parts of the country.

Multichannel audio signals in Max - part II

2018-09-25

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Back in 2006 I came up with an idea for how to make audio signal patch chords in Max have multiple channels.

A few years later I discussed the idea with Timothy Place and other Jamoma developers during a developer workshop at the fourMs lab at University of Oslo. I managed to secure some funding from the Municipality of Bergen for development, and Tim, me and Nils peters started developinbg Jamoma AudioGraph. Initially AudioGraph was called “multibær”, inspired by a dessert at a restaurant up in Holmenkollen. That name was Tim’s idea…

Jamoma AudioGraph was kind of nice, and the three of us submitted a paper for DAFx 2010 on it. However, it was CPU-innefficient and prone to crashing. Jamoma AudioGraph never became more than a proof of concept, but I’d say that the concept itself was thoroughly proven.

Today Max 8 has been released, and the Cycling’74 fairies have been delivering the feature request wish that I have been nagging tham with for the past ten years. The new set of mc multichannel objects is all that I have been dreaming for.

Now, if Ableton Live 10 now can be extended to support multichannel on its tracks in a similar way to Reaper, that would be awsome! But regardless, Xmas came early this year!

New Reaper forum for Ambisonic and 3D audio

2018-08-26

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Cockos has recently set up a dedicated Reaper forum for discussions relating to Ambisonic and 3D positional audio. Cool!

 
 
 

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