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Subject: Re: [korg_mono-poly] Re: High-Frequency Content of Mono/Poly

From: Laszlo Kovari <friendomatic@gmail.com>
Date: 2013-03-30

Hi,
It would be interesting to hunt dowm the treble loss. 
Is it in the VCF or the VCA?
I noticed you posted the schematic of the first revision with the digital noise generator.
The VCA circuit is different in the later revision, maybe it makes a difference in the treble.
I replaced the VCA in my late revision MP for an SSM2164 and I noticed change in the sound.
Less non-linear transistor distortion, more crisp, less noise. 

Laszlo


On Sat, Mar 30, 2013 at 2:50 AM, chipaudette <chipaudette@yahoo.com> wrote:
 

Hi All,

Previously, I did some work trying exploring my perception that my Mono/Poly doesn't have quite enough "sizzle" for my tastes. I partially isolated the loss of the highest frequencies to, probably, in the VCA somewhere.

Well, I finally got out the soldering iron and did made up a "Sizzle Mod" to boost the high-treble to make up for the roll-off in the VCA. If you're interested, check out:

http://synthhacker.blogspot.com/2013/03/monopoly-treble-boosting-sizzle-mod.html

Chip



--- In korg_mono-poly@yahoogroups.com, "chipaudette" <chipaudette@...> wrote:
>
> Hi All,
>
> I've been doing some detailed comparisons of the frequency content of my Korg Mono/Poly to my Korg Polysix. You may be interested to see some of my detailed results...
>
> http://www.blogger.com/blogger.g?blogID=1249615655314260587#overview/postNum=3
>
> My investigation continues specifically for the Mono/Poly at...
>
> http://synthhacker.blogspot.com/2013/02/high-frequencies-monopoly-filter.html
>
> Has anyone explored the signals after the VCF and then through the VCA? Is there anyway to get that missing high frequencies back?
>
> Chip
>