> > 1) Leonid\\\'s fix
> >
> > Twinkling artifacts don\\\'t gone, but sound a little bit different.
> >
> > Some time ago I tried -Y option and it produced sometimes really bad
> > twinkling. With Leonid\\\'s fix -Y option significantly reduces
> > artifacts, but only when used with -X1.
> >
> > Resume: I think Leonid\\\'s fix is right and with -Y -X1 it produces
> > nice results (sometimes I got better results than Fraunhoffer).
> >
>
> I finally got my sound card working and tried out main_theme.wav
> tonight. I was also disapointed that Leonid\'s fix didn\'t remove
> that artificial twinkling that pans from right to left. I haven\'t
> tried any of the other options, but the -Y option (in some form or another)
> should eventually help. It lets LAME try out different values
> of the scalefactor multiplier.
>
I think -Y option should be default on. My additional tests show that it never
decreases quality (after Leonid\'s fix) but increases it often.
> > 3) Decoders - I tried winamp2.5, MS Media Player and mpg123
> > 0.59q. Each decoder sounded another way (and produces another kind
> > of artifacts). Winamp is buggy/broken (I\\\'m sure about it, with
> > joe sat. it produces artifacts in left channel regardless I tried
> > to swap chanels in original wav and reencoded it - again artifacts
> > in left channel). Best results I get with mpg123 but I can\\\'t
> > listen under Linux (damned Li(v || f)e!).
> >
>
> Why doesn\'t mpg123 work under Linux? You could also try xmms - I think
> it was originaly based on mpg123.
>
mpg123 works fine under Linux, but I can\'t listen - I can only decode to wav and
switch to windoze. Damned Creative Labs, there are no working drivers for SB Live! for
latest kernel.
>
> 20 is not so bad: 10*log10(20)=13db, so it lowers the ATH normalization
> by 13db. The uncertainty in if we should use max_energy or ave_energy
> for the normalization is already +/- 5db. I will make this the default
> in the next version.
>
In case you didn\'t noticed:
at 1999-09-16 Robert wrote:
> I don\'t know if you know Bosse Lincolns Paper:
> \"An Experimental High Fidelity Perceptual Audio Coder
> Project in MUS420 Win 97\"
> There you can read, that after some listening tests the \"setting
> didn\'t seem to keep high enough frequencies for transient sounds\".
> And it\'s supposed to replace the MDCT scaling in ATHformula
> ath-=96;
> with
> ath-=114;
> Further in calc_xmin, I think we have to multiply enmax with
its appropriate ratio, but I\'m not sure about that.
> Robert
So I think this (-114dB) should be default in next version.
macik
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