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
>