What exactly is PRaT???


Ok, it’s like this thing and is associated with “toe tapping” and such.  I confess, I don’t get it.  Apparently companies like Linn and Naim get it, and I don’t and find it a bit frustrating.  What am I missing?  I’m a drummer and am as sensitive as anyone to timing and beats, so why don’t I perceive this PRaT thing that many of you obviously do and prize as it occurs in stereo systems?  When I read many Brit reviews a lot of attention goes to “rhythm” and “timing” and it’s useless to me and I just don’t get it.  If someone can give me a concrete example of what the hell I’m not getting I’d sincerely be most appreciative.  To be clear, enough people I greatly respect consider it a thing so objectively speaking it’s either something I can’t hear or maybe just don’t care about — or both.  Can someone finally define this “thing” for me cause I seriously wanna learn something I clearly don’t know or understand.  

soix

Typical loudspeaker step response:

TAD Micro Evolution One loudspeaker

The tweeter’s output leads that of the midrange, which in turn leads that of the woofer. How the heck do you think you will hear PRAT when all three driver’s are out of sync? And this speaker ain’t cheap . . . . .

@soix as a musician, do you feel comfortable with and understand “swing” as it it pertains to music?

Swing: ±music: to produce a bouncy, uneven rhythm - Wikionary

I intuit that PRaT and “swing” are related.  A hifi system that provides insight into music where swing is an essential element, like David Grisman’s bands of the late 70s and early 80s, or almost anything coming of New Orleans, would be considered to be good at reproducing PRaT.

kn

This could be why Sonus Faber speakers have PRAT and others do not:

Sonus faber Lumina II Amator Bookshelf Speakers: Crossover: Optimized amplitude/phase response for optimal space/time performance.

Optimized amplitude/phase response for optimal space/time performance Hybrid IFF-Paracross solution.

The IFF circuitry and the phase coherent philosophy ensure perfect rendering of the virtual sound stage in three dimensions. The new filters also offer greater resolution and more rigorous and coherent reproduction.