Doepfer

Hello,

I' ve got a question about transposing sequences with my Doepfer Mini
Basis system. The sequencer A-155 with one multiple A-180 is also in
the system.

I'd like to add the pitch CV from the sequencer A-155 to the pitch CV
from the keyboard (via MIDI-to-CV-module A-190), so I could transpose
the sequence melodie with my MIDI keyboard.

First I used the A-180 multiple to add CV from A-155 to that from
A-190 and connect the summ of both to the CV-in of the oscillator. The
result was a not understandable sequence of similiar tones - no
sequence with the pitch I wanted. The CVs were not added in that way
I'd like to.

Then I add the both pitch CVs (A-155, A-190) with the A-138 mixer, the
mixer's out connected to the CV-in of the oscillator - now it worked!
The pitch of the sequence line could be transposed using the keyboard.
So I decided that the A-180 must do something that cannot work
especially with this both CVs (A-155, A-190).

Question: what is the reason of the behaviour of the A-180 multiple
module? Is it possible to do some DIY-modification on the A-180 to use
the multiple especially with A-155 and A-190?

Kindly regards

Robert!

Hi Robert,
the easiest way to do this is the use of an A-156 Quantizer module, 
which has
the transpose function too.
Imo it is very useful to the A-155, like the A-154 too!
All the best
Axel

dr_boehm_lebt schrieb:

>
> Hello,
>
> I' ve got a question about transposing sequences with my Doepfer Mini
> Basis system. The sequencer A-155 with one multiple A-180 is also in
> the system.
>
> I'd like to add the pitch CV from the sequencer A-155 to the pitch CV
> from the keyboard (via MIDI-to-CV-module A-190), so I could transpose
> the sequence melodie with my MIDI keyboard.
>
> First I used the A-180 multiple to add CV from A-155 to that from
> A-190 and connect the summ of both to the CV-in of the oscillator. The
> result was a not understandable sequence of similiar tones - no
> sequence with the pitch I wanted. The CVs were not added in that way
> I'd like to.
>
> Then I add the both pitch CVs (A-155, A-190) with the A-138 mixer, the
> mixer's out connected to the CV-in of the oscillator - now it worked!
> The pitch of the sequence line could be transposed using the keyboard.
> So I decided that the A-180 must do something that cannot work
> especially with this both CVs (A-155, A-190).
>
> Question: what is the reason of the behaviour of the A-180 multiple
> module? Is it possible to do some DIY-modification on the A-180 to use
> the multiple especially with A-155 and A-190?
>
> Kindly regards
>
> Robert!
>
>

Hello Axel!

Thanx for answering! Yes, the quantizer could be used, but I don't
want to use it, because I want to do some fine tunings with the
sequence step pitches outside the tempered tuning...

Best regards

Robert!



--- In Doepfer_a100@yahoogroups.com, Axel Jungkunst <phaedra@...> wrote:

>
> Hi Robert,
> the easiest way to do this is the use of an A-156 Quantizer module, 
> which has
> the transpose function too.
> Imo it is very useful to the A-155, like the A-154 too!
> All the best
> Axel

Hello Axel!

That's it!!! Thanx for your tip! It's right, the oscillators (A-110)
have two pitch-CV inputs, so I can use CV-in-1 for the sequencer's
pitch and CV-in-2 for the keyboard's generell pitch. The multiple
A-180 can multiple all CVs to both oscillators... great!

Thank you a lot and best regards

Robert!



--- In Doepfer_a100@yahoogroups.com, Axel Jungkunst <phaedra@...> wrote:

>
> Hi Robert,
> ok, next try: which oscillators are i use? 
> Here you can use two CV Pitch Inputs simultaniously to get
> some strange tunings.
> Would be the next easy way.
> best regards
> Axel

Hi Robert,
ok, next try: which oscillators are i use? 
Here you can use two CV Pitch Inputs simultaniously to get
some strange tunings.
Would be the next easy way.
best regards
Axel

dr_boehm_lebt schrieb:

>
> Hello Axel!
>
> Thanx for answering! Yes, the quantizer could be used, but I don't
> want to use it, because I want to do some fine tunings with the
> sequence step pitches outside the tempered tuning...
>
> Best regards
>
> Robert!
>
> --- In Doepfer_a100@yahoogroups.com 
> <mailto:Doepfer_a100%40yahoogroups.com>, Axel Jungkunst <phaedra@...> 
> wrote:
> >
> > Hi Robert,
> > the easiest way to do this is the use of an A-156 Quantizer module,
> > which has
> > the transpose function too.
> > Imo it is very useful to the A-155, like the A-154 too!
> > All the best
> > Axel
>
>

Hi dr_boehm_lebt

> Question: what is the reason of the behaviour of the A-180 multiple
> module? 
For adding two control voltages for tonal control you need a precision 
adder.
An adder adds the two voltages, but prevents that the electronics of one 
module interact with the electronics of the other module.

A multiple is a direct current connection between all attached 
electronics. The electronic of each connected module will interact with 
the electronics of all the other connected modules. The results won't be 
predictable and in worts case you might destroy something.


A dedicated precision adder module is not existant at the moment in the 
product range of Doepfer. But there are several modules which can be 
used in a similar way. Basically all mixers like the A-138 are similar 
to an adder, but not exactly. Also the quantizer as asimilar function.

> Is it possible to do some DIY-modification on the A-180 to use
> the multiple especially with A-155 and A-190?
If you would modify it. it would become and adder, and would not be a 
multiple any longer.


Basic principle:

- Multiples provide several OUTPUTS where there was only one output before
- Mixers and adders provide several INPUTS where there was only one 
input before


Best regards, Florian
-- 
Florian Anwander, Consulting&Solutions Software GmbH
Franziskanerstr. 38, D-81669 Muenchen, Tel. ++49(89)45841-133
http://www.consol.de

> I' ve got a question about transposing sequences with my Doepfer Mini
> Basis system. The sequencer A-155 with one multiple A-180 is also in
> the system.
>
> I'd like to add the pitch CV from the sequencer A-155 to the pitch CV
> from the keyboard (via MIDI-to-CV-module A-190), so I could transpose
> the sequence melodie with my MIDI keyboard.
>
> First I used the A-180 multiple to add CV from A-155 to that from
> A-190 and connect the summ of both to the CV-in of the oscillator. The
> result was a not understandable sequence of similiar tones - no
> sequence with the pitch I wanted. The CVs were not added in that way
> I'd like to.
>
> Then I add the both pitch CVs (A-155, A-190) with the A-138 mixer, the
> mixer's out connected to the CV-in of the oscillator - now it worked!
> The pitch of the sequence line could be transposed using the keyboard.
> So I decided that the A-180 must do something that cannot work
> especially with this both CVs (A-155, A-190).
>
> Question: what is the reason of the behaviour of the A-180 multiple
> module? Is it possible to do some DIY-modification on the A-180 to use
> the multiple especially with A-155 and A-190?

In principle an A-180 cannot do this job as you never should short outputs
(but that's what you do if you connect the CV out of an A-190 and A-155). In
the A-100 nothing can be damaged by shortening outputs but it's a basic
principle not to do that.
For your application you need a mixer/adder. But the VCOs also have a second
CV input available for this application (one via bus from the A-190 and one
in front from the A-155).

Best wishes
Dieter Doepfer

Analogue Systems makes RS170 dual 5-way multiple. From the manual:
"If you simply wish to sum the signals, you can use the
RS170 as a pair of passive 4-channel mixers with unity gain."

I was under the impression, that it is similar to A-180...

Best regards
Jari Jokinen

> In principle an A-180 cannot do this job as you never should short 
outputs
> (but that's what you do if you connect the CV out of an A-190 and A-
155). In
> the A-100 nothing can be damaged by shortening outputs but it's a 
basic
> principle not to do that.
> For your application you need a mixer/adder. But the VCOs also have 
a second
> CV input available for this application (one via bus from the A-190 
and one
> in front from the A-155).