>
> Hi All-
>
> I've been playing around with the latest version of GoGo-no-Coda. In the
> setup portion of the program the user can disable psycho-acoustics. The
> program says that when encoding at < 128 kbs, quality of encoding is
> improved with psycho-acoustics enabled. The implication given is that
> enabling psycho-acoustics offers little or no benefit when encoding at bit
> rates >= 128 kbs.
>
> Is there general agreement on this? Does this apply to LAME as well? If
> so, I'm wasting a lot time since the encoding is of course much faster with
> psycho-acoustics disabled.
>
> How does one do this with LAME? At the beginning of the usage file that
> comes with LAME it says that when using -f there are no psycho-acoustics,
> but later on it says that -f disables noise shaping and that
> psycho-acoustics are computed.
> --
> MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
>
That inconsistency is a typo - I will fix it. -f used to disable all
psycho acoustics. But now, with '-f' LAME will still compute the
psycho acoustic information (to determine if short blocks should be
used, and if extra bits from the reservoir should be used), but will
disable the noise shaping. (all scalefactors = 0)
At 128kbs, -f makes a slight, but easily detactable reduction in quality.
As the bitrate increases, this reduction in quality should go
to 0.
Mark
--
MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
