1 Oct
2014
1 Oct
'14
7:09 p.m.
On 10/1/14, Philipp Überbacher <murks(a)tuxfamily.org> wrote:
Hi Egor,
Hi Philipp and all the folks that have provided input on the subject.
It is all very informative.
once upon a time I read a lot about audio codecs on
http://www.hydrogenaud.io/forums/. Note that this is a codec focused
forum, not a free software focused one, but people like the lame and
ogg developers do (or used to) read and write at those forums AFAIK. I
also remember that there was some windows tool for the purpose you
describe but I can't recall the name. Anyway, AFAIR it used the
techniques already described, spectral analysis to detect lowpass
filtering.
Great, it will be a good exercise for me, and I will try out this method.
There are some artifacts of the mp3 codec that allow
for rather
reliable detection, pre-echos come to mind. You are likely able to
train yourself to listen for these artifacts, but you may not be able
to un-train yourself ;)
Haha, ok, this is usefull, too!
You guys are great!