alt-preset standard problem samples, with Lame 3.93.1 and before. Options

[JohnV]

There are lots of cases when alt-presets or any mp3 are not transparent, but I gather few "easy" but distorted cases which should be used to further tweak and check alt-preset standard quality.

I'll put more samples here in the future so that those are easier to find and can be found from the same place.
My intention is not to list clips with very hard attacks, other known extreme clips or clips which cause great trouble for every codec.
More like "easier" cases which in my opinion should be handled better by alt-preset standard.

http://static.hydrogenaudio.org/extra/samp...es/sophia2.flac
Clip found by Wombat. Introduces added noise from 1.2-2sec and 4-6sec.

http://static.hydrogenaudio.org/extra/samp.../vangelis1.flac
Although soft attacks, still introduces pre-echo hiss (most noticeable in the beginning).

http://static.hydrogenaudio.org/extra/samp...dogwhistle.flac
Dogwhistle is chirping.

http://static.hydrogenaudio.org/extra/samp.../liebestod.flac
Audible distortion in the background.

http://static.hydrogenaudio.org/extra/samp...ples/birds.flac
In all 4 vbr presets distortion is added, mostly with the "e" when she sings "become".

http://static.hydrogenaudio.org/extra/samp...mples/erhu.flac
Very bad distortion at about 3.5 sec.

This post has been edited by JohnV: Dec 5 2002, 09:22

[Wombat]

Hi all!

Thanks for testing this ff! No one seemed to be interested otherwise!

Dibrom you´re right! -Z makes it even better than only nsbass -8 but
also bigger.

Is there an easy way to test around with nspsy2? The last time i did i
had to do everything in two passes. Also it doesn´t make much sense to test
nspsy improvements with standard switches. The produced nspsy2 files should
at least implement the more tuned short block allocation from the alt presets
to have a fair compare, or does nspsy2 implement this?


regards

Wombat