On my webpage there are 4 encoder (available for Linux IA32
and Windows). I'm interested in the sound quality of these
4 encoders labeled with A, B, C and D. Don't trust the
bitrate display, there're some fakes.

Differences may occure in high frequency encoding (17...19 kHz)
and in music with a lot of dynamic.

Choose useful examples and rate the encoders. Email me the
result and the name of the used samples.

URL: http://www.uni-jena.de/~pfk/mpp/#news

Will you be making you results public Frank? I'd be interested in reading about this experiment.

Yes, of cause.

I will made some deeper changes in the psycho acoustics in the
next time. After every change I need some tests by people with
good hearing to avoid optimizing the encoder for my ears only.

are the listeners supposed to concentrate on certain bitrate ranges / presets?

--standard or --radio

But tweaking listening tests should always be done
at something lower quality setting to get
significant results outside stochastic noise.

Results sent.