On 12/25/2010 12:49 PM, fons@xxxxxxxxxxxxxxx wrote: > On Fri, Dec 24, 2010 at 05:31:59PM +0100, Jörn Nettingsmeier wrote: > >> in a presentation i heard recently, the presenter played a metallica >> single, in direct comparison to pink noise at full scale. the metallica >> mix was significantly louder. go figure... > > That's cheating. Pink (or any color) noise doesn't have a defined > peak/RMS ratio. If it's Gaussian its peak value is unlimited. true. the fun thing was you could see his slide announcing the next demo snippets. imagine reading this: 1. peak-normalized metallica single 2. pink noise at full scale now when you frequently use your average run-of-the-mill pink noise generator at -20dBFS to test speaker arrays, you do have a gut feeling of how "loud" pink noise is. in fact, for reasonable time windows, you're pretty likely to get an average loudness - with JAPA's pink noise generator for instance, the loudness osciallates around a mean value such that if your meter integrates for longer than, say, a second, the reading will be pretty much constant. so the second line was enough to make me cringe and grope for my ear plugs. so it was quite a laugh when the perceived loudness was a lot lower than for the first example. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
