[vorbis-dev] testing Vorbis

[Marcin Flegier]

Hi there

If I correctly understood, Vorbis files have zero padding samples at the
beginning and at the end. Although someone fixed this bug, which added
some silence, sometimes the silence is still added at the end of files
(~0.01s), but only if the song doesn't end with silence.

Second, I tested encoding with simple 100Hz sine wave generated by cooledit
with peak set to -0.6dB. After decoding, the sine wave isn't any longer sine
wave. I don't know why clipping appeared in almost every frame (peak was -0.6dB)
and some peaks were louder (a little), some were softer (a little), and the 
sine sounded very distorted (of course, 0.01s of padding were added at the end).

Third, (I know it's all under heavy development yet, but) frequencies over
~16.5kHz are very attenuated just like in mp3 files. Maybe the psychoacoustic
works this way, I don't know, but if not, I think it should be fixed.

Thanks for replying and I apologize if I don't understand some basic rules of
compressing sound. I'm only a music lover :)

I used yesterday's CVS version for testing.

                                Sathan Inc.

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