There is two types of Synthesis Methods that grew from the Robert Moog (east) and Don Buchla(west).
Here is an explanation from the creator of the Wiard 300 Grant Richter.
It really starts with the concept of a patch. In the “East Coast” instruments (basically all synthesizer manufacturers except Wiard, Buchla and Serge) you have a subtractive synthesis patch entirely oriented towards the filter. This is your classic VCO-VCF-VCA connection with ADSR type envelopes. The envelopes generators typically have only a single output. The oscillators usually have very simple waveforms such as sawtooth and square wave. This is what most people are introduced to and why many people are puzzled by more complex instruments like the Wiard. This patch makes sense for playing with a black and white type keyboard. It produce a limited but pleasing range of timbres and is easy to operate and understand.
In the “West Coast” instruments, there are 3 possible synthesis modes. Additive, non-linear waveshaping and dynamic depth FM are the primary synthesis modes. “East Coast” subtractive synthesis is typically not DIRECTLY supported. It was not in the Buchla or Serge (no 24 dB/Oct. resonant filter). Good aproximations of subtractive synthesis can be patch on the Serge with cascaded filters. These instruments are oriented towards controlling with a multiple output sequencer or multiple output complex envelope generator instead of a black and white keyboard. They produce a larger and more importantly, different set of timbres than the simpler “East Coast” instruments.
The classic patch in a “West Coast” instrument involves two blocks. The first is a complex oscillator which supports both non-linear waveshaping and dynamic depth FM (Buchla 259 and Serge NTO). The second signal processor is a Lowpass Gate or “frequency and amplitude domain processor”. The primary timbre generation is done directly with the oscillator, and the Lowpass Gate just tweaks the amplitude and frequency character. These two blocks are designed to be controlled by one complex envelope generator with multiple outputs routed to all the timbre factors.
Once again this is a simplifed explaination to illustrate subtle points. Actual usage involves a combination of both techniques.
In the 1200 series we have the groundwork laid for a complex “West Coast” voice. The JAG will convert two simple ADSR envelopes into a multiple output complex envelope generator. The Boogie Filter can be used as a Lowpass Gate but also supports the “East Coast” Moog type subtractive character. The Borg 2 Filter is a classic Lowpass Gate that can also be used like the “East Coast” MS20 subtractive filter.
The icing on the cake is the complex oscillator. The Wiard Synthesizer Mini-Wave and VCO (manufactured under license by Blacet Research) is a type of complex oscillator and non- linear waveshaper already well established. A lot of good work has been done with these Wiard designs. Improving on such a solid base is no easy task.
It would be great if a complex oscillator could support as many timbre modes as possible. Simultaneous support for multiple non-linear waveshaping, dynamic depth PM and wavetable would be ideal. If each of these was independent, you could look at them like geometric axis. Modulating the timbre parameters then becomes a matter of “walking about” in a large timbre space with multiple dimensions of simultaneous control. This is true timbre morphing and not just simple crossfading between timbres (which is good too).
This is where my research is currently focused. Exactly when the complex oscillator will be finished depends upon sales of the existing 1200 series modules. If the public is not interested in the extra “West Coast” synthesis methodology, it would be foolish to waste time and money on products for that purpose.
“East Coast” designs are as common as dandelions, but I feel support for subtractive synthesis should be included in a complete instrument. That is why the Wiard designs support BOTH East and West Coast synthesis methods. For example, any Wiard complex VCO will include classic subtractive waveform outputs in addition to the complex outputs.
I think that I need to focus on education to promote the idea of the more complex synthesis “West Coast” style. I am going to try and write manuals for the Boogie and Borg 2 modules that cover the less obvious operating modes. For the short term, I will be concentrating on that.”——-Grant Richter