[Noisebridge-discuss] Ambisonic Sound at Noisebridge

Alexander Phleps alexander.phleps at mailbox.org
Tue Feb 2 23:06:13 UTC 2016


Hey Felipe,

yes I think so but the resolution depends on the about of speakers and the size of the room. 
If you want to reproduce exact positions of different sounds in space, you’d need a Wave Field Synthesis System ( https://en.wikipedia.org/wiki/Wave_field_synthesis <https://en.wikipedia.org/wiki/Wave_field_synthesis> ) in a small room. Some large rooms kind of disappoint in terms of resolution and they’re having up to 2700 speakers ( https://www.ak.tu-berlin.de/menue/research/wave_field_synthesis/parameter/en/ <https://www.ak.tu-berlin.de/menue/research/wave_field_synthesis/parameter/en/> ) - But it’s a different Technology so it’s probably not gonna be a DIY project.

But with Ambisonics it might be worth trying it with 4 speakers. If you have 8, even better. You can move sounds around in space.

Check out spatum by Rui Penha at http://spatium.ruipenha.pt <http://spatium.ruipenha.pt/>
It’s all the tools you need including papers on the topic, plugins and videos - Free and Open Source!



This is actually the stuff I’d be trying out first if I can build this at Noisebridge. If you’re interested and you’re currently in SF, I’m happy to collaborate. Just drop me an email.



Cheers,

Alex



> On 02 Feb 2016, at 13:07, Felipe Sanches <juca at members.fsf.org> wrote:
> 
> Wow!
> That sounds exciting!
>         // pun indented !
> 
> Would it work with sound-speakers installed in the top corners of a room? I was planning to install some of these at our hackerspace (in São Paulo, Brazil, not in Noisebridge, though...).
> 
> I wonder if the software tools that you employ are all libre software. Can you point me to the basic tools that I should be looking up if I were going to setup one of these volumetric audio installations?
> 
> happy hacking,
> Felipe "Juca" Sanches
> Garoa Hacker Clube
> São Paulo, Brazil
> 
> 
> 
> 
> 
> 
> On Tue, Feb 2, 2016 at 6:33 PM, Alexander Phleps <alexander.phleps at mailbox.org <mailto:alexander.phleps at mailbox.org>> wrote:
> Hey everyone,
> 
> I’m in the bay area for a month, hanging out at Noisebridge from time to time. One of the things I’m interested in is spatial sound, and especially the interaction with spatial sound. 
> 
> There are different technologies and different creative approaches to this. One example is the Audium here in SF ( audium.org <http://audium.org/> ). It uses 176 speakers but it is possible to build installations with less, say 8 speakers using a technology called Ambisonics. Obviously this would not be as precise but should be enough for simpler installations.
> 
> So I wanted to propose to build such a thing in Noisebridge. As I’m backpacking right now, I don’t have the necessary equipment to do that. So I wanted to ask if it’s possible to get access to a lot of small speakers and an audio interface with as many output channels as possible. I know these things are expensive but if anyone could spare one even for just a couple of hours, I promise to treat it well. Also, there is nothing that may damages the device. It will simply be used by a piece of software (the spatialization renderer) that sends audio to the various output channels.
> 
> Alternatively, it may be possible to to use a lot of two or four channel audio interfaces on a USB hub as an aggregated device (on a Mac). 
> 
> As for the speakers, if it’s not possible to find similar speakers, a bunch of old crappy different desktop computer speakers will do.
> 
> 
> 
> 
> Happy for any feedback.
> 
> Best,
> 
> Alex
> 
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