Here are three options that i know of:
1. If you have Apple's Impulse Response Utility
(http://documentation.apple.com/en/impulseresponseutility/usermanual/) which is
bundled with LogicPro, you can access the underlying .aif files that make up
the .SDIRproj files by right-clicking the file and choosing "Show Package
Contents" (or you can view the files directly on a PC...). The bformat IRs
included with the software have either "OBF" or "CBF" in their filenames.
2. The set that Eric mentioned: "Collection of room impulse responses measured
in the Great Hall, the Octagon, and a classroom at the Mile End campus of Queen
Mary, University of London in 2008. The measurements were created using the
sine sweep technique with a Genelec 8250A loudspeaker and two microphones, an
omnidirectional DPA 4006 and a B-format Soundfield SPS422B":
http://isophonics.net/content/room-impulse-response-data-set
3. Download site for a set of concert hall impulse responses measured in the
Promenadikeskus concert hall in Pori, Finland. The responses are provided free
for noncommercial purposes: http://www.acoustics.hut.fi/projects/poririrs/
Additionally, it looks like IRs might be available at some point associated
with this project: http://www.notam02.no/web/2011/01/impulse-responses/?lang=en
Cheers,
Joseph Digerness
Consultant | Acoustics and Audiovisual
Arup
77 Water Street New York NY 10005 USA
t +1 212 896 3000 d +1 212 897 1574
www.arup.com
_________
Eric Carmichel (eric at elcaudio.com) / Wed Dec 19 12:28:56 EST 2012:
Hello Toni,
You're correct about Waves--no x, y, z files--just surround on their
Acoustics.net website and IR bundles (I have the Waves Mercury bundle).
www.openairorg.net is the only remaining Ambisonic IR library that I can find.
There has been updated info to the site since I first "discovered" it months
ago.
Although a second website now seems to have vanished, there was a site that
hosted the Ambisonic IRs for a classroom, Great Hall, and Octagon. They even
included detailed floor plans for the three spaces, showing the various mic
locations (00x00y to whatever in 1 meter increments). I had downloaded the zip
files while they existed; however, I hesitate to upload these to my own site
because the files may have been copyrighted (e.g., leaked Waves raw files). If
anybody else can shed light on the site, I don't mind hosting the zip files. I
believe each space had about 300 MB of wav files and info available in zipped
form. As with OpenAir, the IRs were 24 bit res, 96 kHz sample rate.
I've been recording my own IRs, but so far it's hard to get noise out of
recordings. I believe any anomolies or noise in the IRs and/or the dry
recordings manifest themselves in audible and deleterious ways after
processing. Fons A. had pointed out that dc offsets, to include unnatural
waveforms resulting from the joining/splicing of files could create unwanted
artifacts, too. I always use zero-crossing fades when editing material for my
work, but it might also be an advantage to remove very low frequency
(infrasonic) content.
Kind regards,
Eric C.
________________________________
-----Original Message-----
From: Toni Mateos [mailto:[email protected]]
Sent: December 19, 2012 04:15
To: [email protected]
Subject: [Sursound] any library of B-format reverbs ?
Hi all,
Apologies if this has already been asked in this list, but:
** does anybody know of one (or more) library of reverbs in B-format? I'm
interested in all possibilities: either as separate downloadable IRs, or as
convolution plug-ins, etc.
I'm not interested in the decoding of the B-format return to whatever
loudspeaker system; only in being able to play myself with the B-format return.
Thanks a lot!
Toni
PS: I guess that Waves actually has one such library, but they only provide the
decoded 5.1 returns, thus not exposing the B-format intermediate feeds.
So this doesn't count.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://mail.music.vt.edu/mailman/private/sursound/attachments/20121219/100a0478/attachment.html>
____________________________________________________________
Electronic mail messages entering and leaving Arup business
systems are scanned for acceptability of content and viruses
_______________________________________________
Sursound mailing list
[email protected]
https://mail.music.vt.edu/mailman/listinfo/sursound
