[sdiy] ot: rotating speaker simulation or stupid approach

[Czech Martin]

Juergen,

I just started from the point, that usual convolution
can not reproduce time variant systems.
Then I thought about the "snapshot" idea & interpolation.

As test case I thought a rotating speaker (what ever this means)
would perhaps be a good staring point.

Of course, back in my head it rings "Leslie".
I know that the cabinet reflexions are important.

But I thought that I should go from the easier to the
difficult.

And why not try a "Leslie" without distortion, without horn
artefacts, without cabinet artefacts? Perhaps something funny
will come out.

But your comments are very much apreciated and I certainly think
and act in that direction, too.

As it hapens, one room in my flat has a 1mx1m three sided
"apsis" which could be used for a first starting point
of early reflexions.


m.c.

-----Original Message-----
From: jhaible [mailto:jhaible at debitel.net]
Sent: Donnerstag, 3. Juli 2003 11:24
To: Czech Martin
Cc: Sdiy (E-mail)
Subject: Re: [sdiy] ot: rotating speaker simulation or stupid approach



> Hey, I didn't say *Leslie* !

Ooops - I thought you were after the rotating speaker sound
inside an enclosure. Weren't you speaking of reflections?

>The sound of the real Leslie has also distortion
>components

... and noise from the mechanical rotation, sure.

>But if I'm not absolutely way off, all reflexions should
>be there (i.e. the linear part of the stuff).

I'm puzzled. If your goal isn't to emulate a cabinet (Leslie
or whatever), then which reflections do you mean?

The walls of the *room* should be distant enough to
just emulate the rotation and run the output of this
into a room simulation. (Separating the problem.)
But if you have a Horn rotating inside an almost
closed cabinet, the location inside this tiny "room"
will vary dramatically, so you cannot separate
the rotation and the reflections. I really thought
this was what you're after, and this would certainly
be the interesting stuff.

JH.