[sdiy] Does anyone have the Roland IR3109 datasheet? (looking into sh-101 filter modification)

[Samppa Tolvanen]

On Sat, Oct 18, 2008 at 9:09 PM, Julian <julian at port23.co.uk> wrote:
> Or even some decent jupiter 8 schematics?
>
> Or... ; )
>
> What im trying to do is work out if the sh-101s IR3109 can be switched into highpass.  I know the jp8 has highpass, and uses the
> IR3109 filter chip, but i think it uses some other filter ICs also.
>
> Does anyone have any of the literature, of has considered this before?
>

What if You fed pre- and post-filter signal to a differential
amplifier (with a phase and level considerations)?

Samppa