This was a good question. I finally had a chance to hook up my NTO to an
oscilloscope to resolve it. This is not a mixer or interpolating
scanner. It does some sort of wave transformation as Ken had originally
questioned. None of the waveforms are accurate, saw, sine, narrow pulse
or square, in terms of pure synthesizer waveforms. The sawtooth is
concave in shape. The pulse and square have some rounded edges. When
changing from sine to narrow pulse, a simple mixer would show stair
stepping as more pulse was added. In the NTO the sine wave transforms
into a trapezoidal waveform and then into a semi-pulse. From pulse to
square the symmetry changes from 90/10 to 40/60. So definitely some
sort of wave multiplication is occurring in the NTO.
John Loffink
jloffink@...
oscilloscope to resolve it. This is not a mixer or interpolating
scanner. It does some sort of wave transformation as Ken had originally
questioned. None of the waveforms are accurate, saw, sine, narrow pulse
or square, in terms of pure synthesizer waveforms. The sawtooth is
concave in shape. The pulse and square have some rounded edges. When
changing from sine to narrow pulse, a simple mixer would show stair
stepping as more pulse was added. In the NTO the sine wave transforms
into a trapezoidal waveform and then into a semi-pulse. From pulse to
square the symmetry changes from 90/10 to 40/60. So definitely some
sort of wave multiplication is occurring in the NTO.
John Loffink
jloffink@...
> -----Original Message-----"waveforms
> From: sasami@... [mailto:sasami@...]
> Sent: Thursday, September 05, 2002 5:46 PM
> To: SergeModular@yahoogroups.com
> Subject: [SergeModular] Re: NTO question
>
> John DuVal wrote:
>
> >I think the catalogs are pretty clear on this, but to answer, it's a
> voltage
> >sweepable waveform selector ...kinda... The wave mulitplication is a
> >differenct modual.
> > It's a great tone shifter.. gives those thick pads a nice evolving
> effect.
> >But you knew that right??
>
> I kinda figured this, but since the catalog does go on about
> not_______________________________________________________________________
> available on any other synth" from the NTO, it implied soemthing more.
> What
> this means is the NTO basically contains what Jurgen Haible calls an
> interpolating scanner.
>
> Thanks,
>
> Ken
>
> Ken Stone sasami@...<http://www.blaze.net.au/~sasami/>
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies
>