[sdiy] Korg Monotron... Korg 35 chip?

[HOSHUYAMA]

Hello Richard,

I agree with you.  Making a Korg 35 style filter will be easier
than modifying a monotron to a HPF.

Sam HOSHUYAMA
Saitama, JAPAN

Richard Atkinson wrote:
> Hajimemashite Sam-san,
> 
> Maybe a better thing to do is to add in an effect loop after the low pass 
> filter and construct a separate Korg35 style high pass filter using a few 
> transistors and a few resistors. That would give a LPF into HPF style 
> architecture rather than the HPF into LPF architecture of the MS20, but 
> there may be some advantages to this approach.
> 
> The Yamaha SY-1, SY-2, CSY-1, CSY-2A and the solo manual of the D85 organ 
> all use LPF into HPF, whereas the CS-50 / 60 / 80 and Korg 700S, MS20 use 
> HPF into LPF. Non-linear filters such as the Korg35 and diode bridge 
> designs are not commutative; i.e. they give a different result depending on 
> which way round they are connected.
> 
> Richard ATKINSON
> Cambridge, UK
>