MOTM

Count Will and I in.  Bill and Will


--- In motm@yahoogroups.com, "JH." <jhaible@...> wrote:
>
> Hi,
> 
> Here's an idea how I could possibly resurrect my Scanner Vibrato
project.
> 
> Instead of taking another go on a dedicated chorus / vibrato module,
I could 
> offer a full-fledged Interpolating Scanner with 9 stages, with an
option to 
> have the inductors on the PCB to turn it into a Hammond Chorus/Vibrato.
> 
> That way, the PCB can be used by both, Modular Synth users, and
those who 
> are looking for a good Hammond Vibrato emulation.
> 
> My original Interpolating Scanner is described here (8-stage version):
> http://jhaible.heim.at/tonline_stuff/jh_ipscan.html
> 
> and the Hammond Vibrato Emulation is here:
> http://jhaible.heim.at/scanner_vibrato/jh_scanner_vibrato.html
> 
> So the idea is to combine the two projects, hoping there will be enough 
> demand for such a PCB to make it a project to be in the black,
commercially.
> 
> The new version would have 9 stages of linear scanning (to fully
cover the 
> 16 positions of the mechanical rotary Hammond scanner). The scan can be 
> performed by *any* modulation source (LFO, envelopes, audio rate,
you name 
> it) - not just with a LFO as in my earlier scanner vibrato.
> All the audio waveshaping capabilities of the Interpolating Scanner
would be 
> preseved, as well. (Piecewise linear interpolation of fixed, or
modulated, 
> breakpoints).
> 
> The pcb would also include the footprint for 25 inexpensive
inductors, plus 
> the buffer stages for makeup gain (required with cheap inductors;
unlike the 
> original Hammond Line Box)
> 
> All the interconnections between this inductor delay line and the
Scanner 
> part would be done mechanically, with switches, just like the real
Hammond. 
> (No more CMOS switch matrix.)
> This also allows to use the board for a generic interpolating
scanner with a 
> jack for each stage's audio or CV input - with these inputs
normalized to 
> the Inductor delay line's taps.
> 
> No more SSM chips in the new version, either. VCAs will all be
discrete, 
> built from transistor pairs. (9 transistor pairs like LM394 or similar 
> required)
> 
> Would this be an interesting project?
> 
> JH.
>