We're very interested, JH. We have several upcoming applications for
this in my recordings next year. So we hope it manifasts soonish <g>.
Thanks. Bill (and Will)
--- In motm@yahoogroups.com, "JH." <jhaible@...> wrote:
>
> Thinking about future pcb projects ...
>
> One thing I wanted to do for a long time is a stereo chorus based on my
> electronic emulation of the Hammond Scanner Vibrato.
>
> I've built something like that a few years ago:
>
> http://jhaible.heim.at/scanner_vibrato/jh_scanner_vibrato.html
>
> This was purely intended to be an emulation of the Hammond
Chorus/Vibrato
> effect, but I always thought it would also make an interesting, more
> general, and stereo, chorus device.
>
> That would be a "true analogue" chorus in a different sense than the
> BBD-based effects, because the signal is not sampled.
>
> It's not free of side effects, thou. It has a somewhat rough modulation
> waveform, as instead of changing a delay time continuously, it
interpolates
> between 9 taps of a 1ms analogue delay line. It's a linear
interpolation,
> not a switching - best thing is you listen to the sound samples and
decide
> for yourself. It's very rough (in a Hammond-ish way!) for vibrato, and
> increasingly smoother when the dry signal is mixed in for chorus.
>
> It's a quite complicated method to crate a simple chorus, compared
to a BBD
> circuit. It requires a 50-pole (fifty!) low pass filter, but that
can easily
> be built from 25 cheap inductors (less than a dollar per piece at
Mouser)
> and 25 capacitors.
>
> On the positive side, it's a lot more "direct" sounding than a
BBD-based (or
> digital delay based) chorus, as the maximum delay time thru the whole
> circuit is only 1ms. (Speak of latency ...)
>
> If there's enough interest, this could be a project for a future PCB
> development. I wouldn't restrict this to Hammond emulation, but make a
> mono-in / stereo out device in the fashion of many Roland / Boss
dual-BBD
> chorus circuits. Just without BBD. Let me know what you think ...
>
> JH.
>
> PS: this is not to be confused with my Interpolating Scanner, which is
> planned to be a future MOTM module.
>