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Subject: Re: [motm] Re: yamaha filter question

From: Richard Brewster <pugix@...>
Date: 2004-12-18

That's interesting! Now that I know this about the MOTM-480, I may have
to buy a kit and put a custom panel on it.

-Richard Brewster (buying a bigger house to make more room for MOTM)

The Old Crow wrote:

> An MOTM-480 is two 12dB/octave filters with HP/BP/LP simultaneously
>available internally, and with a spare 1U module panel and several 1/4"
>jacks the remaining ones could be brought out.
>
> 480 is like this:
>
> +---> BP out
> |
> (HPF) | (LPF) (HPF) LPF
> inputs--+---+---+ /---+---+---+---> LP out
> | BPF | (BPF)
> | |
> +-----------/
>
> (filter #1) (filter #2)
>
>
> The "BP out" isn't on a CS-80 voice, it was added because there was
>panel space and it is a useful signal. However, it is simple enough to
>bring the four remaining (HPF#1)(LPF#1)(HPF#2)(BPF#2) signals out to
>jacks, and it is also (relatively) easy to use a switched jack to break
>the filter#1->filter#2 path for both audio in and CV in, creating two
>completely independent filters.
>
>Crow
>
>
>
>