PLAN B analog blog

Thanks Peter, for clarifying this!

So, if I understand it right, then the model 30 is much further from 
the DX7 than I would have thought. The whole point of the DX7 is to 
dynamically alter the FM indexes which, if I have it right, is not 
possible on the model 30 (since the VCA's come after the FM-processing, 
in the FM-modes)?

So the way to approach the model 30 is to choose a particular patch and 
then to alter the waveshapes of the three VCO's to attain timbrel 
variations? So in some sense, the waveshapers of the model 30 have 
taken the place of the FM-indexes of the DX7.

This is very cool. I just tried to do something like this on the Nord 
Modular G2 demo I have on my Mac: two oscillators with continuously 
variable waveshapes, one frequency modulating the other with a fixed 
index (and in a second example, one 'ring modulating' the other), and 
then modulating the oscillator waveshapes with an envelope. It sounded 
great!

Btw. what is the use of the select buttens? Maybe this is to select 
which of the VCO's will be affected by the waveshape CV in?

Thanks!

Tomas.

Btw. It is of course no big deal if the model 30 doesn't do frequency 
shifting of external signals perfectly, since it is clearly designed as 
a sound source, rather than a processor...


On 24 Apr 2008, at 01:12, (i think you can figure that out) wrote:

> You're welcome, Tom! Thanks for the support.
>
>  Your conjecture on replicating the overtone structure of an external
>  audio band ac signal is spot on, however won't do the trick here.
>  Once you see the basic flow of the M30 you'll see the VCAs come after
>  the processing. SO while you could get a digitized rendering if you
>  will of an external waveform that way, it would come after the
>  Frequency Shifter. Here is the basic M30 flow diagram, it'll make it
>  much clearer:
>
> http://www.ear-group.net/m30block.jpg
>
>  SO the only way to do it is how I mentioned earlier, and yes there
>  will be some harmonic distortion due to scaling of the VC Freq inputs.
>
>  in as far as M32, thanks for your enthusiasm. I will post some sound
>  samples which will explain how cool the Kinetic gates are. Until you
>  'see' them in action it's hard o put your arms around the concept.
>
>  - P