[ARSCLIST] Haas effect

[Marcos Sueiro <mls2137@xxxxxxxxxxxx>]

Hi, George,

I do not normally disagree with your posts, but I thought the Haas 
effect, strictly speaking, referred to localisation of a sound source; 
i.e., given a pair of sound sources A and B in different places but the 
same signal, the earlier (<40 ms) sound from A will determine the 
perceived overall location, even if the sound from point B is quite a 
bit louder. At delays > ~40 ms, the two sources start to be distinguishable.

I would think of what you describe more as a sort of masking effect.

Cheers,

marcos

George Brock-Nannestad wrote:
> From: Patent Tactics, George Brock-Nannestad
>
> Hello,
>
> Karl Miller commented on 
>
>
> > Don Cox <doncox@xxxxxxxxxxxxxx> wrote:
> >    
> > >   ****One major problem is that the various notes of a chord are played at
> > > different velocities (to use the MIDI term), in order to bring out the
> > > counterpoint. I think it would be very difficult to disentangle this from
> > > the noisy waveforms.
> >    
> >   Indeed, and with the reproducing piano roll this is a given limitation as
> > the keyboard is divided into a treble and bass range with one dynamic level
> > available for each.
> >    
> >   Karl
>
> ----- I have to confess that I do not know what "velocity" means in MIDI, but 
> in piano playing this means the speed with which the key is depressed, and 
> that determines the "strength" of the note sounded. However, it is the timing 
> of a note and not its strength that determines what is perceived - the 
> precedence effect (used to be called the Haas effect) says that the first 
> sound to arrive will determine the timing, and if the same sound is 
> reproduced stronger slightly later, it is still the first that determines the 
> perceived timing. And fortunately, timing is what a piano roll can provide, 
> although it cannot provide individual dynamics. I think that it is the 
> precise timing that actually makes the illusion created by piano rolls so 
> good.
>
> ----- in stating the above I will not say that the pianist does not think 
> that he regulates the dynamics for each individual note - he may or he may 
> not - but then the pianist also thinks that the feeling with which the key is 
> held down _after_ the sounding will influence the sound. It will influence 
> the pianist only (and perhaps an audience with eyes open to watch the 
> antics).
>
> Kind regards,
>
>
> George