[Mp4-tech] [audio] Coded/Decoded MPEG-4 AAC Signals

["Sergio G. Rodríguez Soria"]

Dear list,
Is there any database of audio signals (in any Raw Format) previously
coded/decoded by an MPEG-4 AAC  Codec in 5.1 and stereo format?? We are
looking for audio signals of this  kind in order to perform listening
tests with several matrixed/spatial audio coding techniques
independently  from the bit-reduction scheme.
Thanks in advance,
Sergio
Sergio R. Soria
LSI-EPUSP
SBTVD Program
SP-Brazil