Doepfer

Many thanks Florian !

This is a very clear explanation to me.

So for a 6 bit buffer, 32 adresses would be scanned an their order
could be remapped according to a certain control voltage ?
Reminds me of a wavetable.
Instead of the usual up/down/up+down order, this would mean an almost
infinite number of patterns (that is, if all 32 adresses are filled)
Probably 4 bit (8 notes ?) should be enough and would keep this
feasible regarding the number of possible sequences.

I think this could be a very interesting & exciting concept for a module.

Best regards
Joost




--- In Doepfer_a100@yahoogroups.com, Florian Anwander
<Florian.Anwander@...> wrote:
>
> Hi Levka
> 
> > I do not yet understand completely what Florian means by this;
> > Florian; Could you perhaps elaborate a little on this ? 
> Ok, but it will be a little bit longish...
> 
> Originally an arpeggiator as in Roland Jupiter Series, in SH101 or in 
> the Korg Monopoly/Polysix was a simply "misusage" of the keyboard 
> scanning electronics. The keyboard of these synths is like a matrix 
> scanner. The electronics send addresses (usally 6Bit) in a certain
order 
> to this matrix, read the data (=pressed keys) from this matrix into a 
> buffer, and distribute these (key-)data from the buffer to the sound 
> generation.
> 
> Usually this reading from the buffer is very(!) fast (at some hundered 
> kHz rate). For arpeggiating the buffer is simply read slowly at the
rate 
> of the (internal or external) clock of the arpeggio.
> So at each trigger of the clocksignal provides the next key data to the 
> sound generation.
> 
> For up, down, up/down arpeggios you simply change the way the matrix of 
> the keyboard is addressed. whether the adresses are counted up or down 
> or....
> 
> This is the classic arppeggio function in basic.
> 
> Now you may imagine, that it would be great to have influence on the 
> address data of the keyboard scanner. Example: normally the order of
the 
> notes are
>   adresse 000 001 010 011 100 101 110 111  (order= a0 a1 a2)
>   notes    c   c#  d   d#  e   f   f#  g
> If I press a c-major the order of the notes in the buffer will be
> "c e g". A c-sus9 will be "c d f g"
> 
> Now i simply invert adress a1:
>   adresse 010 011 000 001 110 111 100 101
>   notes    d   d#  c   c#  f#  g   e   f
> Now the order of the notes in the buffer (and the order of an arpeggio) 
> will be "c g e". The c-sus9 is now "d c g f"
> 
> You see that a simple conversion of the address data does create 
> complete new arpeggio patterns. Imagine what is possible, if you do
such 
> conversion depending on other sequencings, on states of some 
> controlvoltages or what ever...
> 
> 
> 
> I know, that a MIDI based arpeggiator system would have to simulate 
> this, but I think, it would be worth the effort :-)
> 
> 
> 
> Florian
>