[sdiy] Scanner Vibrato emulation, first results

[jhaible]

Hi Scott,

I'm at home now, and could finally listen to your samples.
Thanks again for providing them - this is exactly what I needed!

My first impressions:

The modulation is "deeper" than on my emulation, probably
with a higher AM component.

Maybe I've done too much about compensating the voltage drop
along the delay line. The Hammond has rather coarse steps
from one attenuation factor to the following. I have a different
factor for each stage, so probably I've made it too even.

But it's really encouraging to see that I'm apparently on the right track.
I guess adding a higher AM component won't be much of a problem.

Which Hammond model did you play? My delay line is modelled after a
B2 (not B3) circuit.

Thanks again,

JH.


> Just for fun, I made a quick recording of my ham'n playing the same
> notes/stops through the same sequence: dry, C1, C2, C3, V1, V2, V3.
> If anything, the real thing sounds rougher (quite a bit more grundge):
>
> http://www.tellun.com/snd/hammond_chorus_vibrato.mp3
>
> Straight out, no leslie, no reverb, no synthesizers, no.
>
> At 4:18 AM +0200 2003/05/21, jhaible wrote:
> >The stops are 808808008, the chord is G3, C4, D4 (if I call the
> >lowest C on the keyboard "C1").
> >
> >I'm especially curious about the V3 setting, because it sounds
> >unexpectedly rough - is a Hammond V3 really like this?
> >
> >JH.
> >
> >
> >>  What notes and stops are you using on these? I'd like to compare with
> >>  my Hammond, it sounds pretty darn close as is.
> >>
> >>  >Here are some results, straight from the breadboard:
> >>  >
> >>  >http://www.oldcrows.net/~jhaible/mp3/scanner_vibrato/
> >>  >
> >>  >Short *.mp3 samples for an organ chord (old CX-3: no Hammond)
> >>  >
> >  > >dry, C1, C2, C3, V1, V2, V3
> >>
>
>