My BB opamps did help a lot, but there is still noise. You will be
able to add filters, that is interesting. Please tell us how it goes.
PM if you need any help with the schematics.


--- In k5synth@yahoogroups.com, Antoine Deschênes <antdes45@y...> wrote:
>
> Yeah, about your OPA4134 mod, I don't remember if you told the
> improvement was big or small.
>
> Since the free samples I've got from TI are SMD, I will have to
build an
> adapter. It's harder to solder, but I could put some filtering
> components on the adapter board. Yay!
>
> Also, something interesting to build would be one of the uCapps.de
> (MIDIBox) projects and control some filters with it. I wonder what a
> Moog filter on a K5 sounds??
>
> nelsonj_sce a écrit :
>
> >I recently got a Roland MKS70 and figured out how to mod it so I can
> >run (6) external signals through its filters/VCA/Chorus. I am
> >running the four outputs of the K5 through the MKS70 with the MKS70
> >in "mono mode" (Guitar synth mode). By filtering the K5 midi output
> >through my computer and MidiOX, I can send different parts of the K5
> >keyboard to different midi channels, and then on to the filter of my
> >choice in the MSK70.
> >
> >The result: Different notes on the K5 trigger their own filters. It
> >is a true 4-voice poly board. If I trigger more than four voices,
> >several notes go through the same filter in a paraphonic (?) mode.
> >
> >In my opinion it sounds fantastic!!! Just think about it, the K5
> >additive OSCs, stacked into multi layers, and then run through the
> >very decent ANALOG filters/VCA (and Chorus)of the MSK70 (filters are
> >24db with Resonance and self-oscillation). I can also add 2
> >additional DCOs (square/pulse/saw/noise) from the MKS70 - this helps
> >add some much needed low end to the K5, or whatever else I want (like
> >noise). Think PPG 2.3 and a very rich sound. The analog filters
> >just add so much life and beef to the K5 - I love it!
> >
> >I will try to record some MP3 (K5 solo, K5 with DCOs, K5 with
> >DCOs+Filters, K5 with DCOs+Filters+Chorus). Note that I upgraderthe
> >op-amps in my K5 to Burr/Brown, did the 147k resistor mod,and this
> >helps out also, but the filters are what really does the trick.
> >
> >I am in love with the sound and have spent hours and hours playing
> >with the K5 through the MKS70. My BCR2000 is programed to control
> >all the MKS70 settings so tweaking is very easy.
> >
> >I hope to post some sounds in a week or so. Stay tuned...
> >
> >
>