Hello Fons,
Thanks for writing.
I have recordings made in highly reverberant spaces--and no such artifact exist 
in those recordings. Yes, a reverb tail can be heard, but not a loud, distinct, 
"gunshot" sound anywhere in the recordings.
I will upload the 2 s IR for you (I can't go to ftp site from current coffee 
cafe at this moment). However, the same effect occurs with IRs downloaded from 
the Open Air Library--I tried them to see whether my recordings were to blame. 
My IRs were obtained using swept sine measurement and deconvolution, as per 
protocol outlined by Angelo Farina (by the way, did anyone ask if the Farina 
piezo-pinna transducer is related?).
What might be the problem is the software used to apply the IRs to dry 
recordings. In my uploaded example, Sony Sound Forge 10d and its built-in 
Acoustic Mirror was used. Perhaps I should be using Altiverb, Waves IR3, 
YouVerb (I made this up), etc. I'm no expert on IRs--just getting started aside 
from apply Waves' and Trillium Lane's reverbs to music.
Many thanks for help. Please listen to sample--it's more than a reverb 
tail--and pretty odd.
Best always,
Eric




________________________________
 From: Fons Adriaensen <f...@linuxaudio.org>
To: Eric Carmichel <e...@elcaudio.com>; Surround Sound discussion group 
<sursound@music.vt.edu> 
Sent: Saturday, December 15, 2012 9:51 AM
Subject: Re: [Sursound] Ghost in Machine
 
On Sat, Dec 15, 2012 at 08:20:49AM -0800, Eric Carmichel wrote:

> No, this isn't at all like playing speech from middle of a word
> or music. Certainly beginning a recording from a waveform that
> would have abrupt onset would result in a pop or click.

To me it sounds as the normal reverb tail. Which you don't notice 
when the sound that caused it is included, as it sounds natural
in that case.

There may be another issue, but to determine this I'd need the
2 seconds B-format room IR you used.

Ciao,

-- 
FA

A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
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