Hi folks, Since the ASA nixed the idea of posting those papers on the web, I distilled out the raw masking curves. I also added in a few of the raw masking curves as published in "Paramaetric Bit Allocation in a Perceptual Audio Coder"; this paper only mentions in passing that Dolby distilled their masking data for AC-3 research from both the Ehmer papers I already mentioned and later research done by Loius Fielder. I have the Fielder papers on order... hopefully they'll arrive next week. In http://www.xiph.org/ogg/paper I've placed an .xcf file containing the graphs as overlays (this is a Gimp native file). Use the 'Layers and Channels' menu to make the desired layers visible. Monty --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/