QUOTE
Originally posted by fewtch
I've never heard any ringing with Producer Pro files (that I can remember). In fact, I remember more ringing with earlier iterations of Lame, before the --alt-preset switches.
from ff123 web site:
Fraunhofer (Opticom) Producer Pro, AudioActive, or Radium hack of this codec: Some people swear by this codec, but I think that at CBR 128 it pays too much attention to frequencies greater than 16 kHz at the expense of more critical lower frequencies. In addition, on certain musical selections which contain lots of out-of-phase information (I don't know how rare this is), this codec may produce unlistenable results (see my page "Out of Phase Quirk in FhG 1.0/1.2 build 63i Codec",
http://ff123.net/outofphase.html). In addition, bAdDuDeX has heard pre-echo problems with this codec on castanets.wav (see his comment on my listening test of castanets.wav,
http://ff123.net/preecho.html).