On Wed, Feb 02, 2005 at 12:33:17 -0800, davidrclark@xxxxxxxxxxxxx wrote: > Hi Steve, > > Thanks for your comments on impulses, etc. > > My main concern was that, and I'm sure you know this perfectly well, that > mathematical physicists are fond of saying about impulses, in the context > of integration, that the shape of the impulse doesn't matter too much. > It's a handy way to sweep away a difficult derivation! Sure. They can still sound good though, and thats what were after, right? Obviously its goo to have other techniques too. > (The following is more specific, hopefully of interest to at least some > LAUer's.) > > On my web page is a song "latest" that uses calculated IR's. Some software > is there to produce them, also. But I know you're a busy guy! The song > "latest" is for headphones, as usual. Long ago you and some others > encouraged me to post the IR generators. They were so user unfriendly > that I took some time to "put some lipstick" on them. Hopefully they're > not too bad now. I havent looked at your software yet, but I'l download it and give it a go when I have time. You didnt post your URL BTW :) > Regarding synthetic space --- ironically a problem with the Green's function > technique that I'm using, the calculated IR's are a little too accurate. > They have extremely sharp spikes, and the timing is very accurate. You can > hear echos where you might actually hear more of a reverb (with actual > diffuse reflections). Amplitudes can also become very large, yet the > sound have very little power. Here again, I think that diffusion and diffuse > reflections need to be incorporated, or something mimicing them. However, > this accuracy produces crystal clear sound, and I find more and more that > I like it compared to the mushy sound that a lot of audio software produces. > Some reverb models sound hilarious to me because they're so physically > erroneous. I can't hear the music over the sound of my own laughter. Reverb is largly a matter of taste I think. > I'm not a big fan of ray-tracing at this time. It just seems to me that > it's equivalent to a sparse grid without some sort of optimization or > pruning method. But I have no experience other than reading technical > articles. I've not heard to output of ray traced impulses, it just seemed like an interesting method. - Steve
