From Goran Finnberg: "... 3. The problems we found occur at staggeringly
high rates -- above 85% of all files failed bit-level certification..."
Testing bit-accuracy doesn't require rocket science but it is amazing how
many developers seem to skip even the simplest of tests. Last year we did a
demo of some test gear at an AES meeting only to discover that the
combination of Adobe Audition and the little M-Audio Transit interface we
were using was not bit accurate. Further investigation determined that the
$79 interface really was bit-accurate but that Adobe Audition was shifting
the level a few tenths of a dB thus generating an unexpected 32 bit floating
point output with the possibility of truncation distortion if one were to
assume 16 bits in could be written unchanged to a 16 bit file!
Bob Olhsson Audio Mastery, Nashville TN
Mastering, Audio for Picture, Mix Evaluation and Quality Control
Over 40 years making people sound better than they ever imagined!
615.385.8051 http://www.hyperback.com http://www.thewombforums.com