Doepfer

DIETER SAYS:
" Concerning the new A-155 controller it would be
important for us
which kind of "user interface" the members prefer.
E.g. the type of running mode
selection

a) manual control by a rotary switch
b) manual control with up/down buttons
b) controlled with up/down inputs (each pulse selects
the next running mode)
c) voltage controlled
d) separate clock inputs for clock forward and clock
backward instead of one of
the selection modes above
or
e) only one clock input and another (digital) input to
select the direction
up/down

All these selection types are alternative (i.e. they
exclude one another). We
need to know which is the prefered way to select the
running mode. I think that
the voltage controlled selection is the best way (with
manual control and CV
input with attenuator, e.g. 0...1V = forward / 1...2V
= backward / 2...3V =
pendulum 1 / 3...4V = pendulum 2 / 4...5V = voltage
controlled adressing of the
sequencer step. But this would exclude the possibility
of separate clocks for up
and down as desired by some users.
And in case of voltage controlled mode selection or
selection with up/down
buttons or inputs: which is the best order of the
different running modes that
correspond to the control voltage (maybee different
orders that are programmed
by the user - a bit like the filter orders for the
A-107). And I think a display
of the selected running mode is necessary for voltage
controlled mode selection.
And which running modes are necessary (2 different
pendulum modes like MAQ ? One
Shot ? ...)
How about a voltage controlled clock source integrated
into the new sequencer
controller ?

A lot of questions, I know. But there are so many
possibilities to built a new
sequencer controller and we need to know which
features and which "user
interface" the members would prefer.

Kind regards
Dieter Doepfer
Doepfer Musikelektronik GmbH
http://www.doepfer.de
email: hardware@doepfer.de



SO,I'LL PROBABLY MAKE A POLL ABOUT THE VARIOUS
POSSIBLE FEATURES OF THIS NEW SEQ CONTROLLER,OK??
BAKIS.






=====
synthfreak(parallel worlds)
athens-greece
[Doepfer_a100] group owner-moderator

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I don't know if this is too late (suggestions on the new 
sequencer), but  all of the dirfectional control could be handled if 
they elected to include an ANALOG VC INPUT.

What this would do it convert an analog voltage into digital, and 
use those numbers to override the count on the sequencer at a 
given time.  Sound impossible?  It ain't - I've got a working 
prototype of my own at home.  I used an ADC 0804 chip, which 
converts the incoming control voltage into four bit binary, and 
those numbers go into the counter presets and BANG - you can 
totally control the direction of travel based on the amount of 
voltage at that pin at a given time.  Ground = step 1, +8 = step 
sixteen.

Want it to do pendulum?  Insert a triangle wave with a 0 to 8 volt 
swing.  Want random?  Put  noise in the input.  Want a sequence 
just between stages 6 and 12?  Just narrow the amplitude of the 
input..

Also, you can put a 1/voct keyboard into it and slave the 
sequencer to advance to any step at the touch of a key.  This is 
really handy.

It's a nice way of doing directional control because you can 
control all these things externally, ao you can tunr them off/on or 
change this at will when you want via voltage automation.

just me two cents.

best,

Peter

> just me two cents.
> 
> best,
> 
> Peter

... and here are mine:-

Firstly I agree with Peter and various others earlier in the thread - 
keep it simple, so that the new module is complemented by existing 
modules, to allow greatest flexibility without becoming overly 
complicated. For example, if control of direction was a simple 
digital high=backwards/low=forwards (say) input, then adding a A160 
clock-divider into the equation will give required switching for a 
pendulum mode. Use a 163 VC Freq Divider instead gives even more fun 
possibilities - the mind just boggles (and I get the impression that 
list members are *really* taken with the idea of this possible new 
module...)

As for Dieter's info...

> The A-155 control board (this is the small board with
> the 4 buttons and 4 jack
> sockets) has a 10 pin connector that is used to
> control the analog boards
> (potentiometers) and the gate/trigger board
> (switches). The 10 pins of this
> connector have the following functions:
> 
> A0, A1, A2 (adresses for 4051 multiplexer on
> potentiometer and trigger boards)
> Clock

... that the 4051 control pins are so accessible may have sold him 
another module - might just go out and buy one to see what's possible!

Tim

P.S. for Peter:

> prototype of my own at home.  I used an ADC 0804 chip, which 

- are you sure this number is right - had a quick look at Analog Dev. 
site and couldn't find it? Is it just a mere 4 bits, or more like 8 
or 10 and your're just using the top 4?