Doepfer

You find my answers written inline.

Best wishes
Dieter Doepfer

> Hi,
>
> I'm also looking impatiently forward to this module, but I would
> also think that reset inputs would make this module much more
> versatile than without.

The A-143-4 was planned as a VCLFO but not as VCO. Later we added the range
switch and the temperature compensation that allows the limited usage as a
VCO as well. But we are also working on a low cost Quad VCO with a sawtooth
core (A-110-4 ?, nothing but four VCOs of the DIY synth board). This will
have saw and rectangle outputs (rectangle with PW/PWM). So far it is not yet
announced on our website as there are a lot of other modules with higher
priority.

> Personally, because I would use this module more for VCO than LFO
> purposes. So the last thing what would this module perfect for
> me, would be a saw-tooth waveform in addition. Maybe such one
> like in the A-110 Standard VCO, which is the nicest analog
> saw-tooth I've ever heard! -- no joke, so much nice harmonics!

It's all a matter of taste. Some like the A-110 sound, others hate it :-)
I personally also prefer the A-110 over the A-111 (concerning the sound, not
the range and CV linearity) but I know many users who would disagree.

> I'm dreaming of a polyphonic synth with that VCOs ... ok, sorry
> enough euphoria. But I would buy it also without one.
>
> Ollie

Sorry to disagree, Florian, but the most essential aspect of a (musical) VCO is certainly not its "fine tuning" pot. The fine tuning is just a byproduct of its tuning pot. Use a very high value pot and you're set.
No, the most essential part of a VCO is the quality of its exponentiator. Building a decent VCO isn't all that difficult. Building a good VCO which tracks over a wide range is a whole different matter.

FWIW: I have 4 CEM-based VCO's in my Aemit system. They track over 10 octaves, and the "coarse tuning" pot sweeps through the whole range. Still, I can tune the VCO's in perfect unison quite easily. Though I have to add that they have fine tuning pots too, and I used very high quality pots for the tuning...

_g

--- In Doepfer_a100@yahoogroups.com, Florian Anwander <fanwander@...> wrote:

>
> Hi all
> 
> Dieter Doepfer schrieb:
> > The A-143-4 was planned as a VCLFO but not as VCO. 
> I think we should take in account, that there is an essential aspect 
> missing which is necessary for a real VCO:
> There is no fine tune. I assume the Frequ.-knob would cover a range of 
> around 5 octaves or more. I doubt that the four oscillators could ever 
> be tuned to a real common pitch as it would be required for unisono or 
> polyphonic use.
> 
> Florian
>

Hi all

Dieter Doepfer schrieb:
> The A-143-4 was planned as a VCLFO but not as VCO. 
I think we should take in account, that there is an essential aspect 
missing which is necessary for a real VCO:
There is no fine tune. I assume the Frequ.-knob would cover a range of 
around 5 octaves or more. I doubt that the four oscillators could ever 
be tuned to a real common pitch as it would be required for unisono or 
polyphonic use.

Florian

> Hi all
>
> Dieter Doepfer schrieb:
> > The A-143-4 was planned as a VCLFO but not as VCO.
> I think we should take in account, that there is an essential aspect
> missing which is necessary for a real VCO:
> There is no fine tune. I assume the Frequ.-knob would cover a range of
> around 5 octaves or more. I doubt that the four oscillators could ever
> be tuned to a real common pitch as it would be required for unisono or
> polyphonic use.
>
> Florian

Right, there is a discrepancy for the traditional frequency control
behaviour for LFOs and VCOs (provided that only one frequency control is
available, but not a set of e.g. fine tune, coarse tune, octave switches).
Usually the controls of a LFO cover a range of several octaves whereas the
frequency control of a VCO should cover a smaller range as the pitch of a
VCO is mainly controlled by a CV coming from the sequencer, keyboard,  Midi
interface or whatever. We added a jumper for the control range of each knob
to pcb. As already said the A-143-4 is planned in the first place as a VCLFO
that can be "abused" as a VCO too. The planned A-110-4 will be more VCOish
(with octave switches, smaller control range of the manual frequency knob,
sawtooth core, PWM).

Best wishes
Dieter Doepfer

will the a110-4 have linear fm inputs??

i like the a110's in my system, but what i really miss its a linear fm inputs in them.(yes, i do know, it can be added as a DIY panel...)

Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist

[Doepfer_a100] group owner

www. parallel - worlds - music. com

www. myspace. com/ parallelworldsmusic

www. myspace. com/ interconnectedmusic

www. myspace. com/ memorygeist

www. DiN. org. uk

www. musicamaximamagnetica. com

www. vu-us. com

www. shimarecords. co. uk

--- On Mon, 2/22/10, yahoo@doepfer.de <yahoo@doepfer.de> wrote:

From: yahoo@doepfer.de <yahoo@doepfer.de>
Subject: AW: AW: AW: [Doepfer_a100] awaiting arrival of A-143-4 quad vclfo/vco
To: Doepfer_a100@yahoogroups.com
Date: Monday, February 22, 2010, 5:11 PM







 



  


    
      
      
      > Hi all

>

> Dieter Doepfer schrieb:

> > The A-143-4 was planned as a VCLFO but not as VCO.

> I think we should take in account, that there is an essential aspect

> missing which is necessary for a real VCO:

> There is no fine tune. I assume the Frequ.-knob would cover a range of

> around 5 octaves or more. I doubt that the four oscillators could ever

> be tuned to a real common pitch as it would be required for unisono or

> polyphonic use.

>

> Florian



Right, there is a discrepancy for the traditional frequency control

behaviour for LFOs and VCOs (provided that only one frequency control is

available, but not a set of e.g. fine tune, coarse tune, octave switches).

Usually the controls of a LFO cover a range of several octaves whereas the

frequency control of a VCO should cover a smaller range as the pitch of a

VCO is mainly controlled by a CV coming from the sequencer, keyboard,  Midi

interface or whatever. We added a jumper for the control range of each knob

to pcb. As already said the A-143-4 is planned in the first place as a VCLFO

that can be "abused" as a VCO too. The planned A-110-4 will be more VCOish

(with octave switches, smaller control range of the manual frequency knob,

sawtooth core, PWM).



Best wishes

Dieter Doepfer





    
     

    
    


 



  






      

[Non-text portions of this message have been removed]

> will the a110-4 have linear fm inputs??
> 
> i like the a110's in my system, but what i really miss its a 
> linear fm inputs in them.(yes, i do know, it can be added as a 
> DIY panel...)

Probably yes (the VCO of the DIY synth board has a linear FM in), as well as sync - though it's very early to answer such a question for a module that is not yet developed. The A-110-4 is planned as a derivate of the DIY synth circuit for the second half of 2010, provided that we will finish all other designs in time (DIY synth kit, Dark Time sequencer, A-132-4 Quad VCA, A-143-4 Quad VCLFO/VCO, A-142-4 Quad Decay, A-191-2 CV/Gate to Midi/USB, A-190-3 polyphonic Midi/USB to CV/Gate interface, Touch Keybord, Dark Matter expansion unit for the Dark Energy and some more). A lot of work ahead, let's how we can make it.

Best wishes
Dieter Doepfer

ok!      :-)


Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist

[Doepfer_a100] group owner

www. parallel - worlds - music. com

www. myspace. com/ parallelworldsmusic

www. myspace. com/ interconnectedmusic

www. myspace. com/ memorygeist

www. DiN. org. uk

www. musicamaximamagnetica. com

www. vu-us. com

www. shimarecords. co. uk

--- On Mon, 2/22/10, yahoo@doepfer.de <yahoo@doepfer.de> wrote:

From: yahoo@doepfer.de <yahoo@doepfer.de>
Subject: AW: AW: AW: AW: [Doepfer_a100] awaiting arrival of A-143-4 quad vclfo/vco
To: Doepfer_a100@yahoogroups.com
Date: Monday, February 22, 2010, 7:05 PM







 



  


    
      
      
      > will the a110-4 have linear fm inputs??

> 

> i like the a110's in my system, but what i really miss its a 

> linear fm inputs in them.(yes, i do know, it can be added as a 

> DIY panel...)



Probably yes (the VCO of the DIY synth board has a linear FM in), as well as sync - though it's very early to answer such a question for a module that is not yet developed. The A-110-4 is planned as a derivate of the DIY synth circuit for the second half of 2010, provided that we will finish all other designs in time (DIY synth kit, Dark Time sequencer, A-132-4 Quad VCA, A-143-4 Quad VCLFO/VCO, A-142-4 Quad Decay, A-191-2 CV/Gate to Midi/USB, A-190-3 polyphonic Midi/USB to CV/Gate interface, Touch Keybord, Dark Matter expansion unit for the Dark Energy and some more). A lot of work ahead, let's how we can make it.



Best wishes

Dieter Doepfer





    
     

    
    


 



  






      

[Non-text portions of this message have been removed]

not looking for precision vco's. only lfo's and polyphonic experiments. i have precision vco's when i need precision. this thing looks perfect. 

--- In Doepfer_a100@yahoogroups.com, <yahoo@...> wrote:

>
> > Hi all
> >
> > Dieter Doepfer schrieb:
> > > The A-143-4 was planned as a VCLFO but not as VCO.
> > I think we should take in account, that there is an essential aspect
> > missing which is necessary for a real VCO:
> > There is no fine tune. I assume the Frequ.-knob would cover a range of
> > around 5 octaves or more. I doubt that the four oscillators could ever
> > be tuned to a real common pitch as it would be required for unisono or
> > polyphonic use.
> >
> > Florian
> 
> Right, there is a discrepancy for the traditional frequency control
> behaviour for LFOs and VCOs (provided that only one frequency control is
> available, but not a set of e.g. fine tune, coarse tune, octave switches).
> Usually the controls of a LFO cover a range of several octaves whereas the
> frequency control of a VCO should cover a smaller range as the pitch of a
> VCO is mainly controlled by a CV coming from the sequencer, keyboard,  Midi
> interface or whatever. We added a jumper for the control range of each knob
> to pcb. As already said the A-143-4 is planned in the first place as a VCLFO
> that can be "abused" as a VCO too. The planned A-110-4 will be more VCOish
> (with octave switches, smaller control range of the manual frequency knob,
> sawtooth core, PWM).
> 
> Best wishes
> Dieter Doepfer
>