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alt-preset standard problem samples, with Lame 3.93.1 and before.
post Jan 19 2002, 11:23
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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.

Clip found by Wombat. Introduces added noise from 1.2-2sec and 4-6sec.

Although soft attacks, still introduces pre-echo hiss (most noticeable in the beginning).

Dogwhistle is chirping.

Audible distortion in the background.

In all 4 vbr presets distortion is added, mostly with the "e" when she sings "become".

Very bad distortion at about 3.5 sec.

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

Juha Laaksonheimo
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post Jan 22 2002, 00:20
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Just so everyone knows, I'm not going to have much time to look at these clips for awhile so modifications to alt-preset to help with these (if possible) may be a ways off. It is helpful to list the clips in this manner though so that they are easier to find in the future..
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