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Thread

High-Frequency Content of Mono/Poly

2013-02-22 by chipaudette

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

Re: High-Frequency Content of Mono/Poly

2013-03-30 by chipaudette

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:

Show quoted textHide quoted text

>
> 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
>

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

2013-03-30 by Florian Anwander

Hello Chip

> http://synthhacker.blogspot.com/2013/03/monopoly-treble-boosting-sizzle-mod.html
I have to try this. Looks promising. Did you do some audio examples?

Florian

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

2013-03-30 by Laszlo Kovari

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

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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"; 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
>

Re: High-Frequency Content of Mono/Poly

2013-04-01 by chipaudette

Hi Florian,

Here's the audio comparison that you requested.  Hopefully the YouTube audio has sufficient quality for you to hear the difference in the very high frequencies...

http://synthhacker.blogspot.com/2013/03/monopoly-audio-of-sizzle-mod.html

Chip

--- In korg_mono-poly@yahoogroups.com, Florian Anwander <fanwander@...> wrote:

Show quoted textHide quoted text

>
> Hello Chip
> 
> > http://synthhacker.blogspot.com/2013/03/monopoly-treble-boosting-sizzle-mod.html
> I have to try this. Looks promising. Did you do some audio examples?
> 
> Florian
>