On 2011-12-17, Gerard Lardner wrote:
BLaH4, Design of Ambisonic Decoders for Irregular Arrays of
Loudspeakers by Non- Linear Optimization Heller et al, preprint 8243
AES San Francisco nov10, discusses the various trade-offs and
presents our favoured method.
Is BLaH4 available anywhere apart
On Fri, Dec 16, 2011 at 09:34:04AM -, Richard Lee wrote:
Does anyone have Fons' 5.1 matrices handy that they could
send me? I can't promise anything quick as its 35C in the
shade and 100% RH in Cooktown and my small brain is boiling.
Here (Parma) it's around 3C and 100% RH (thick mist)
On Fri, Dec 16, 2011 at 3:33 AM, Fons Adriaensen f...@linuxaudio.org wrote:
The matrix columns are W,X,Y.
I gather that Ambdec version 3 files (v. 0.5.1) use ACN for the
coefficient ordering, which would make it W, Y, X.
For example the LF coefficients you give for the CE speaker (dir=[1,0,0])
On 16/12/11 17:48, Aaron Heller wrote:
It's in the high-50s (F) and about 40% RH here in Menlo Park
It zero degrees here at Hest Bank on the edge of Morecambe Bay in the
north of England and the water in the air has turned solid.
I will need some time to digest all this information.
It
Is BLaH4 available anywhere apart from the AES site? I am not a member,
only curious.
Gerard Lardner
On 16/12/2011 09:34, Richard Lee wrote:
BLaH4, Design of Ambisonic Decoders for Irregular Arrays of
Loudspeakers by Non- Linear Optimization Heller et al, preprint 8243
AES San Francisco
http://ambisonic.info/info/ricardo/shelfs.html
This is now only of historical interest. My latest thinking on Shelf Filters
is encapsulated in BLaH3 Is my decoder Ambisonic? where Aaron's clarity puts
me to shame and explains why I'm still a beach bum.
The only useful info there which isn't
Now, if someone has thoughts on shelf filters for higher orders...there is some stuff in Daniel's
PhD thesis, but...
On 15/12/2011 19:19, Richard Lee wrote:
http://ambisonic.info/info/ricardo/shelfs.html
This is now only of historical interest. My latest thinking on Shelf Filters is
The actual shelf gains (the difference between LF and HF gain for any
component) don't tell the real story. Changing the LF or HF gain for all
components by the same amount doesn't modify the decoding, it just results in
some EQ.
Du...uh! I stand corrected. Shelf filters change the ratio
The best references for stuff on the shelf filters is probably the BLaH Trilogy at
http://www.ai.sri.com/ajh/ambisonics/BLaH.html
Dave
On 14/12/2011 10:46, Roger James wrote:
Hi Fons,
Thank you for your comprehensive response.
On 13/12/11 22:31, Fons Adriaensen wrote:
On Tue, Dec 13,
Hi,
I am once again doing some experiments decoding UHJ source material to
ITU standard domestic surround sound speaker layouts and re-encoding the
results into AC3. I keep seeing in the Ambisonic literature on the web
references to the use of shelf filters in the decoding process and the
On Tue, Dec 13, 2011 at 09:31:27PM +, Roger James wrote:
My current decoding workflow is as follows.
1. Recover B format from UHJ using convolvers and the impulse responses
provided by Angelo Farina.
You could also use jconvolver / fconvolver. An UHJ decoder preset
is provided.
2.
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