Cheap speakers for ambisonics

you wouldn't want to do this. the whole point of ambisonics is full range similar/identical speakers in arbitrary positions. about the opposite of 5.1
imo better get less and better speakers.

Hi,

Externals, try these:

http://www.icst.net/index.php?show=137

About the speakers (cheap ones):

Wharfedale Diamond, Infinity, Behringer.

There's a mailing list here:

https://mail.music.vt.edu/mailman/listinfo/sursound

All the best

Alessandro Fogar

2007/2/7, Miguel Negrão :
>
> Well, the minimum for 2nd order ambisonics is 9 speakers (2+1)^2 and 9 good speakers cost a lot of money, so that is not an option. I could use 1st order, which requires 4 speakers, but i'm not sure 4 speakers would give a good spatial image for complete 3d sound.
> I'm aware of course that i should get good speakers... that's not the point, the point was if it would be possible to still reproduce ambisonics in cheap surround speakers (9 for exemple). But I'm inclined to think it is not because of the lack of low frequencies.
>
> By the way is there a forum somewhere dedicated to ambisonics ?
> Does anyone know of a external, patch or plug-in for ambisonics reverb ?
>
> Thanks
>
> Miguel Negrão
>
>
>

>
> Externals, try these:
>
> http://www.icst.net/index.php?show=137

Or as an alternative, try these:

http://www.maxobjects.com/?
v=libraries&id_library=89&requested=ambisonic&operateur=AND&id_plateform
e=4

For reverb, I have generally been using standard reverbs in MSP
(freeverb, gigaverb, yafr etc) and mixing the output signals directly
into the Ambisonic domain signals (usually x, y and sometimes z is
convincing enough). All sources can share the same reverb busses,
since late reflections are mostly directionless.

Early reflection differences can be achieved using simple delays or
combs, depending on how realistic your room simulation and distance
cues need to be. Reverb send mix per source can be dependent upon
the object distance, and optionally the object's own direction and
diffusion pattern, if you're going for that level of realism.

Someday soon I should be able to put together a demo patch for simple
distance cues with Ambisonics; including distance amplitude
attenuation, distance filtering, simple object radiation patterns and
reverberation. Someday when I'm not busy...

Quote: lists@grahamwakefield wrote on Wed, 07 February 2007 18:24
----------------------------------------------------
> >
> > Externals, try these:
> >
> > http://www.icst.net/index.php?show=137
>
> Or as an alternative, try these:
>
> http://www.maxobjects.com/?
> v=libraries&id_library=89&requested=ambisonic&operateur=AND&id_plateform
> e=4
>
>
> For reverb, I have generally been using standard reverbs in MSP
> (freeverb, gigaverb, yafr etc) and mixing the output signals directly
> into the Ambisonic domain signals (usually x, y and sometimes z is
> convincing enough). All sources can share the same reverb busses,
> since late reflections are mostly directionless.
>
> Early reflection differences can be achieved using simple delays or
> combs, depending on how realistic your room simulation and distance
> cues need to be. Reverb send mix per source can be dependent upon
> the object distance, and optionally the object's own direction and
> diffusion pattern, if you're going for that level of realism.
>
> Someday soon I should be able to put together a demo patch for simple
> distance cues with Ambisonics; including distance amplitude
> attenuation, distance filtering, simple object radiation patterns and
> reverberation. Someday when I'm not busy...
>
>
----------------------------------------------------

I'm not sure from your user name if you are Graham Wakefield, but if that is the case the best ambisonics reverb patch i saw was indeed an example in your set of ambisonics objects. But it was a reverb based on just two oposing walls.
Does this mean that ambisonics reverb is still such an unexplored thing that there aren't a lot of papers written about it or software available ? It is true that in ambisonics it's hard to tell apart the spatialization part from the reverb part because they must are both part of the process of putting a source in a virutal 3d environment, maybe an ambisonics reverb vst or external will have to be also encoder, so that it receives a mono input and as output it gives an encoded ambisonics signal.
Anyway i will try your aproach.

Hi,

> Yes, I'm using those, they are quite nice, But I was asking for ambisonics Reverb externals or vsts. Designing a ambisonics reverb with raytracing and all thar seems to be a lot of work, if someone as done it allready it would be great, if not, no choice but to do it myself...

It's not for Max/Msp but for Supercollider, look (only for inspiration) at:

http://sonenvir.at/downloads/sc3/ambiem/

If you have access to Ircam Forum software there is the Spat library.

All the best

Alessandro Fogar

You could always just buy the speakers and return them if they're too junky ;)