Hi Sean,
The problem with feeding first-order program material into a third-order
decoder is that the per-degree max_rE gains will be wrong.
For 2D: 1, 0.707 vs. 1, 0.924 (, 0.707, 0.383)
For 3D: 1, 0.577 vs. 1, 0.861 (, 0.612, 0.305)
I'll also point out that for first-order program material, listening tests
show that dual-band decoding and NFC filters make a substantial difference.
Still important at third-order, less so for fifth-order and above. See
http://www.ai.sri.com/~heller/ for further details.
We're planning a new set of HOA listening tests on CCRMA's new 56-speaker
array.
Aaron Heller (hel...@ai.sri.com)
Menlo Park, CA US
On Tue, May 14, 2019 at 12:51 PM Sean Devonport <rsdevonport1...@gmail.com>
wrote:
>
> Hey there everyone,
>
> Want to ask if anyone has any thoughts on decoding first order ambisonics
> to higher order decoders?
>
> I've been experimenting with decoding first order on third order decoders
> and I still feel like they work relatively well in my setting (a
> hemispherical dome-like configuration of 14 speakers using AllRAD maxRE
> decoders).
>
> I do know there is some upmixing software in the works (
> http://research.spa.aalto.fi/projects/compass_vsts/), but so far,
> unfortunately, I haven't been too happy with the quality of it (however I
> do really like the other plugins in SPARTA). Maybe I'm not using it
> correctly but I find the upmix generally comes out too sharp.
>
> I'm hoping someone may have experimented a bit more with this and could
> give me their opinions, tips, tricks, or point me in the direction of some
> research that could give me a solid answer.
>
> Many thanks in advance!
>
> --
> Sean Devonport
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