Re: Digital Compression - was New SSM

["Scott Fraser" scottbfraser]

< If anyone is interested in the result of inverting audio files, below is =
a demo.
This is part of a recording I made a few months ago with the Unley Symphony=
 Orchestra. (Schoeps CCM4Lg in ORTF directly into a Sound Devices 702 at 24=
/96)
The first 20 seconds are the correct audio. 20 - 25 seconds is with the ori=
ginal wav file inverted (hence no output). 25 - 30 is back to the origiinal=
 audio. 30 seconds to the end is with and MP3 version of the file inverted.
What you hear in the last part of the file is the audio that hasn't been ca=
ncelled out by inverting the phase. In other words, audio that was left out=
 of the MP3 conversion. >

Did you time slip the mp3 to make it phase coherent with the WAV? Mp3 codec=
s add some frames at the beginning of the file, & different codecs add diff=
ering numbers of frames, so if the mp3 was not manually realigned with the =
WAV, the test is invalid.

Scott Fraser