On Sat, Jan 19, 2013 at 12:34:57AM +0100, Jaromír Mikeš wrote: > "R/Haas Delay" time to 0-6 ms doing nice panning C -> R If 'panning' means 'to create an apparent source direction between two (or more) speakers', then whatever you obtain by using such small delays has nothing to do with the Haas effect. Using small delays (< 0.6 ms) works well for headphones, as can be expected - a real off-center source produces the same. It can produce some spatial effects on a speaker system iff the speakers are close to the listener, e.g. the typical multimedia pair sitting besides a computer monitor. But it doesn't scale to larger setups where most listeners can't be expected to be exactly on the center line. The Haas effect is a special case of the precedence effect, which means: * There is a small range of delays (from a few milliseconds up to a few tens of ms) for which 1. the apparent source direction is that of the first sound, but 2. the delayed sound is not perceived as a separate event (echo). The Haas effect means that this remains true even if the delayed sound is a few dB louder that the direct one, for a somewhat smaller range of delays. Both cases describe a 'snap to first' effect rather than one that creates a virtual source between two speakers. The precedence and Haas effects can be exploited to reinforce a sound using speakers in a different direction without changing the apparent direction of that sound. It can't be used for panning. Adding early reflections to a mix can improve the result, in some cases dramatically. But the apparent source direction will still be controlled by the amplitude panner used on the direct sound. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
