I agree Dieter

cheapness is an important feature of this module

and I think LEDs and audio frequencies are very worthwhile features!

Richard


yahoo@... wrote:

>
>
>
> > the reason i think is that the triangle wave is much easier to
> > produce than the sine.
> >
> > correct me if i'm wrong, Dieter.
>
> Whenever one designs an oscillator one has to decide which is the core
> oscillator (e.g. sawtooth for A-110, triangle for A-111 and most of the
> LFOs, sine for A-143-9). The other waveforms have to be derived by waveform
> converters from the core waveform which always leads to imperfections
> (except rectangle which is easy to generate by a comparator). The A-143-4
> uses a triangle core. A voltage controlled oscillator with a perfect sine is
> already available: A-143-9
>
> If we expand the A-143-4 by everything that is available in other
> oscillators (additional waveforms, range or octave switches, hard sync, soft
> sync, linear FM, additional CV inputs, LED display ...) the front panel
> width and the price will increase and the advantage of a compact module with
> only the most important functions is lost. The problem is to find the right
> compromise between functions and price.
>
> Best wishes
> Dieter Doepfer
>
>