[sdiy] New Scanner Vibrato demo

[JH.]

Hi Ingo, and diy-list,

>I'd love to hear a demo of your Interpolating Scanner with both the
>processed and the dry signal recorded at the same time. This way it
>could be compared to a mechanical or even a digital scanner vibrato.

I have such samples on my page
http://www.jhaible.heim.at/interpolating_scanner_and_scanvib/jh_interpolating_scanner_and_scanvib.html

Unfortunately not with a real Hammond signal, but just with a CX-3 - but 
that should do for a comparison when running the dry sample thru something 
else.
Yes, it's from an older Version of my Scanner, but the Signal path is barely 
changed, nor the scan function - it's just a different implementation of the 
crossfadings.


>I remember myself trying to recreate a scanner vibrato demo of yours
>on a Hammond organ years ago. I wasn't very sucessful - the vibratos
>were too different (mine was from a M100 organ) but I learned a lot
>about the differences between a Hammond and a Korg CX3 ;-)

Oh, and I even bought a complete BX-3 effect board from Korg once (those 
were the days!), because I thought their vibrato was nice, and the 1-manual 
CX-3 didn't have it. I still think it's a nice vibrato, but far from a 
scanner.

BTW, I don't expect _my_ Scanner Vibrato to be the same in an A/B test with 
any Hammond organ picked at random.
There are too many parameters that can vary, and age. Capacitors changing 
their values - whatever.
But the circuit topology should be able to cover such variations to a high 
degree, because it's a "physical model" of the process that makes the effect 
in the original. But that still means you'd have to tweak (or have th e 
opportunity to tweak) some component values to get closer to a specific 
Hammond you want to emulate.
And finally, my Delay Line is a 25-Inductor version, as used in very early 
Hammond organs. Later models had a 18-Inductor line, where the Inductors 
were loosely coupled. But Hammond's goal certainly was to get the same 
effect with less expensive means, so "25-L" and "18-L+M" versions should be 
quite similar in how they sound.

JH.