Hi, FWIW passing along an idea, perhaps someone has already thought of it. ;-)
Have been trying to develop a realistic rendition of engine sounds for my 737 cockpit; in particular, the fading of the engine noise as airspeed and altitude increase from takeoff to altitude and the roar when reverse thrust is applied during landing or perhaps a change in noise level when the cockpit window is slid shut. while the built-in sound factors ( ln, log, lin, etc ) and wave files do an okay job I wanted a single continuous sound spectrum from engine start to max rpm without having to "stitch" segments of wave files. For fan and turbine whine the ln factor work pretty well, but thrust noise needed some help with fading. One trick to help the sound system is to define a function ( f( of some variables) ) in the source, in this case, the thrust as a function of airspeed, altitude, actual thrust, etc and bind it to a new property and use that property. In this way, you could define a fairly complex polynomial to catch all the acoustic nuances your little heart desires. So you would build a realistic, accurate acoustic model; use whatever the existing sound system provides and tailor the rest in the source. Don't think this is something we would want to include as part of the baseline or expand the built-in functions, but for the code-capable types something to consider if you want to refine the existing sound system. Just my $0.02 John ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/22/13. http://pubads.g.doubleclick.net/gampad/clk?id=64545871&iu=/4140/ostg.clktrk _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
