[Speex-dev] Quality degradation on new versions

[Aviv Tamar]

Hi,
I have been using speex version 1.0.5 on a text-to-speech program. Recently
I upgraded to version 1.2beta1
and noticed that the waveform the I got after encoding and decoding on the
new versions (beta1,beta2) is much
more different than the original than on version 1.0.5. I also ran a PESQ
comparison test on 700 voice samples
and got better results in the older version  (I used quality 9, and
disabled perceptual enhancement).
Do you know what can cause these changes?
My application requires the waveform after decoding to be as similar in
shape to the original, so if the difference
is the result of some new addition to the encoder i would like to know how
to turn it off.
Thanks,

Aviv