[tremor] Re: inline'd functions under MSVC and poor tremor output

[Dimitry Andric]

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On 2002-09-04 at 22:13:14 Jeff Pike wrote:

JP> Any word on why the tremor output differs significantly from the
JP> oggdec output?

Well, I just built the ivorbisfile example program, and I must say
that I don't hear much difference between its output and the normal
vorbis decoder output.

However, I tested this with a 44100 Hz, 16 bit stereo input file. For
a comparison, I made a screenshot of a spectral analysis of 3 test
files; see: http://www.xs4all.nl/~dim/pics/tremor_comparison.png
(warning, this is a 1.2 MB file). In the screenshot, Test0.wav is the
original wave, before Vorbis compression, TestF.wav is decoded using
the floating point decoder, and TestI.wav is decoded using Tremor.

I suspect that something is going wrong with the 11025 Hz sampling
rate, the single channel or the very low bitrate you have been
encoding at.

You could try:
- - Encoding a 44100 Hz, 16 bit stereo file, see if that makes any
difference for you
- - Encoding using 11025 Hz, however using -q 5 or something instead of
  using -b 20

Maybe this will enable you to narrow down the problem.

Cheers,
- --
Dimitry Andric <dim at xs4all.nl>
PGP Key: http://www.xs4all.nl/~dim/dim.asc
Fingerprint: 7AB462D2CE35FC6D42394FCDB05EA30A2E2096A3
Lbh ner abj va ivbyngvba bs gur QZPN

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