Yeah, I was planning on trying this out myself, but in a slightly different
manner: I've already got a 1/4" jack mounted on the right side that can already
route an external signal through the chorus unit, with a switch to send the
signal to the vcf instead, though I haven't connected that part yet.
Here's some fun to try yourself: take the output of the chorus's delay line,
buffer it with an op-amp and an attenuator, put it back in near the input.
I'm don't remember offhand which point is which but use the postive side
of c15 and c23.
Now Switch on your Poly, change the attenuator's knob, and... hey... is
that a flanger I hear?
I've got more where that came from, a detailed web page is in the works.
On Wed, Jul 17, 2002 at 08:53:32AM -0000, plutoniq9 wrote:
> I completed another smooth mod 4 the poly800. I used a normally-closed 1/8"
> jack to cut the noise source and allow you to send an external audio source
> through the noise VCA->VCF. Also, the onboard chorus can then effect the
> ext. audio signal..nice
>
> I tapped the audio input at the "+ input" of capacitor C24. Basically, I
> desolderer the "+" lead of C24 from the circuit board. I ran a wire from the
> now-desoldered "+" lead to the "tip" solder lug of a 1/8" phono plug. The hole
> that the "+" lead of C24 was removed from, i soldered a second wire from this
> to the "Normaly-closed" lug of the phono jack. Finally, a third wire from the
> "ground" lug of the phono jack to a suitable "ground" point inside the poly800.
> The input is suitable for line-level audio signals. The poly800 has one hell of a
> nice sounding VCF filter. In the absence of a jack being plugged into the
> phono jack, the noise source is processed through the poly800 in normal
> fashion.
>
> Enjoy...use caution & mod at ya own risk buckeroo!
>
> P9
>
>
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