Doepfer

hello dieter,

i believe that there are copyrights on the wavetables,
but i'm not 100% sure. maybe it is a good idea to ask
waldorf. since this year they are back in the business,
maybe they have a simple answer to the copyright question.

best wishes

ingo



--- In Doepfer_a100@yahoogroups.com, <hardware@...> wrote:
>
> > Is there a way to add the non-linear transfer function as an add-
on
> module?
> 
> The miniwave module does the non-linear transfer. And that's how 
it's
> working.
> 
> Analog Input #1 is converted by a 6 bit ADC (analog-to-digital 
converter)
> into a six bit "word" (range 0...63, the PPG waveforms were only 64 
in
> length). This is used to address the first 6 address inputs of a 
memory
> (normally a ROM or EPROM). If a standard sawtooth wave is used and 
the
> offset and amplification adusted accordingly one obtains the 
standard
> wavetable synthesis. But even other waveforms or not an accordingly 
adjusted
> sawtooth may be used to obtain special effects (e.g. picking out 
only a
> fraction of the complete wave). A second ADC (normally controlled 
by a
> modulation signal, e.g. from an ADSR or LFO or ...) is used to 
generate the
> higher addresses for the EPROM. This control voltage is used to 
scan through
> the different waves. Switching from one wave to the next can be 
independent
> from ADC#1 or triggered by ADC#1 (e.g. waveform switching is 
allowed only at
> the maximum or minimum value 0/63). In the first case the wave can 
be
> altered even in the middle of a waveform. In the second case the 
end of the
> wave has to be reached to allow the switching to a new wave.
> Finally a rotary switch (e.g. with 16 positions) can be used to 
select a
> waveform set.
> 
> The module could be used also as a CV processor if ADC#1 is fed not 
with an
> audio signal (e.g. sawtooth) but a slowly changing control voltage 
(e.g.
> ADSR or LFO).
> 
> As said before: not very complicated from the technical point of 
view. But
> without good wavetables it's nothing ...
> And we do not want to get troubles with wavetable copyrights 
(provided that
> there are copyright)
> 
> Best wishes
> Dieter Doepfer
> 
> (P.S. Maybe we have a lawyer in the group who knows details)
>