[sdiy] NJM-2069 internals. Was: Re: SSM2040

[bayne d'artagnan]

On 11/5/07, Bob Weigel <sounddoctorin at imt.net> wrote:
> Right.  The 2044 has the most similar to moog character of the chips I
> think.  The 2069 is hooked up like an OTA based chip as I recall.  It's
> more similar to the Roland filters I think but the NJM unit sounds
> less...I dunno plastic isn't the word I want but there's just a certain
> sonic character in the 3109 and it's ...it's almost like a person with
> multiple personalities or something :-).

Plastic is the word. It sounds great to me, nice and plasticky! But I
agree, the NJM sounds better.

> And there's a different
> variation of it in the newer gear with the 3R05 and it's less blatant
> maybe in it's version of that 'character' but also less ominous sounding
>  Whereas the later ones sound less vast and have a kind of
> 'artificial' rub but it's not shrouded maybe with this vastness so that
> it works in certain sounds and sucks on others.

Yeah, I don't like the I3R05. I've been meaning to proto up a board so
I can try one in my modular and see if I like it better in a different
setting.

> Anyway the 2069 has some similar attributes to the Rolands I think but
> it just sounds more 'wet' and doesn't make those goofy sounds really as
> much but rather is useful for more very ominous sounds.

Right so I'm curious if anyone has any insight about the internals of
the 2069? It's believed that both the Roland filters are essentially
variations on the BA-662.