On Thursday 26 July 2012 13:37:45 Julien Claassen did opine: > Hello again! > So the very short answer would be: It's not been done inany Linux > software yet. > Thanks for the explanations. I have thought a little too simple it > seems and the outcome is what I originally expected. No go. :-) > Kindly yours > Julien
Speaking as a bit of an engineer, to do a Leslie simulation would require that something like a bucket brigade be done with the digital data once decoded, then setup a pair of taps that would sample the digital from the brigade , advancing the signal in time for the speaker nearest the listener, and delaying the other half of the mix equally. Then combine it, and send it on down the path to the speakers, or perhaps to 2 separate speakers, but the 2 speaker approach would add its own artifacts. What you are then building is in essence similar to a comb filter with a variable clock speed. And this effect would only be valid for a stationary listener, because the bucket-brigade would have to get longer for the angle being synthesized according to where the listener is. The farther off the centerline, the longer the brigade, up to the time lag representing the maximum separation of the actual speakers on the Leslies rotating board. I'm sure some curious coder could work out the math, but the bucket-brigade would probably have to be done in hardware. Such IC's are (or were a decade ago) available. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! Most of our lives are about proving something, either to ourselves or to someone else. _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
