I'm finished with my comparison of the 64 kbps c't samples with different encodings of AACEnc v2.15. If some of you are interested, I can upload them to my homepage and host them for a while, because I have about 15 MB of free webspace at the moment. But this means I have to choose which ones would make sense and/or include those that interest you most. I would suggest to pack at least the reference.wav, FhG AAC, PsyTEL, WMA9 and mp3PRO into one huge SFX-RAR archive and rename them, so that you won't know which is which. If you would prefer another procedure, just let me know.