dieter says:
"At the moment we are about to finish the d3c (Drawbar
controller) and d3b (organ basspedal) as we want to
show these units at the Musikmesse Frankfurt. We are
also about to make a redesign of the R2M/A-198 manual
with a more sensible  pressure sensor from an US
company. And an optional universal relay board for the
MTC64 is about to come (board with 16 relays
controlled by midi note on/off messages that can be
used for a lot of jobs). And we try to show at least
the prototypes for the normal A-100 CV/Gate keyboard
and the "reloaded" version of the TKB. But I cannot
guarantee that we will manage this. We have another
module prototype available that uses a infrared
distance sensor by Sharp to generate a CV and Gate but
we are not satisfied with the results as the sensor
does not work as we expected. May be we will show also
the prototypes of the new BBD and universal AD/DA
module but that's quite uncertain.

We also are about to built a "double A-100 monster
suitcase" for the musikmesse with 2 x (168 HP x 12 U).
If anybody is interested I can publish pictures of the
empty case.

b.t.w. The same case will also be made for the new
shop in Los Angeles of our US representative Analogue
Haven/Shawn Cleary."









=====
Bakis Siros
Parallel Worlds / Polariton
Athens-Greece
[Doepfer_a100] group owner
http://www.shimarecords.co.uk
http://www.ward12.com




__________________________________
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The following Doepfer_a100 poll is now closed.  Here are the
final results:


POLL QUESTION: Would you find intersting to have the
cv /gate sockets in the front of the
sequencer panel(MSQ16/3 ans
shaltwerk) ...instead of back side ?
like it is now...

CHOICES AND RESULTS
- yes, 15 votes, 78.95%
- no, 0 votes, 0.00%
- no opinion, 4 votes, 21.05%



For more information about this group, please visit
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> We also are about to built a "double A-100 monster
> suitcase" for the musikmesse with 2 x (168 HP x 12 U).
> If anybody is interested I can publish pictures of the
> empty case.

I am interested in the pics.

Keld

hello,

<< We also are about to built a "double A-100 monster
suitcase" for the musikmesse with 2 x (168 HP x 12 U).
If anybody is interested I can publish pictures of the
empty case. b.t.w. The same case will also be made for
the new shop in Los Angeles of our US representative
Analogue Haven/Shawn Cleary. >>

Thanks for the comments.
The MusikMesse news in particular is exciting. This
will be a great year.

The new "super suitcase" is incredible and will solve
anybody's space issues. The price is really good too
considering what it would cost for the equivalent in
portable suitcases of that size, and its less bulky of
course. We will migrate our demo model in the shop,
now housed in seperate G6 cases, to the larger
suitcase.

The storefront is opening in Pomona (outside of Los
Angeles). Anyone within the area may come out, I'll
have details on my site in some weeks. The most
important news is that Doepfer and I are working on
putting together a huge stock order. If you remember
when I started doing this end of September last year I
promised that I would resolve the wait times for
delivery...so that everything ships from stock. This
will primarily become true end of February once this
order comes in. My site will be upgraded to show what
is in-stock at any given time and there will be online
ordering with credit card processing.

Lots of exciting things in the works, thanks for the
support.

Talk to you soon, Shawn
www.analoguehaven.com

__________________________________________________
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doepfer says:
"The "A-100 monster suitcase" has the same receptivity
as 8 normal A-100
suitcases (A-100G6) as it is has 168 HP and 12HU each.
The two cases
are
mounted face-to-face during transportation by means of
the middle
frame. The
pictures are still without bus boards, power supplies
and modules."







THE PICS WILL BE IN THE PHOTOS SECTION OF THE GROUP IN
ABOUT 10 MINUTES.
BAKIS.








=====
Bakis Siros
Parallel Worlds / Polariton
Athens-Greece
[Doepfer_a100] group owner
http://www.shimarecords.co.uk
http://www.ward12.com



__________________________________
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Hello,

I'm new here, so hi : )

just got my A-100 six weeks ago, needless to say my girlfriend is dead jealous ;
)

so, my first question on here: are there convertor plugs to banana jacks so i
could use my
A-100 with a serge or modcan system? and if such a thing exists, could i
integrate the two
machines fully -i.e. not electrocute myself because banana cables aren't
shielded and
maybe even being able to stack them so i wouldn't need multiples.

right, hope that makes sense

cheers

Isjtar

Ideas on cost?

That would make moving my system so my easier.

Not as nice to look at as my wooden cases but very practical.


David Salter
Reuters Ltd
Senior Project Manager
Solutions Support Group
Tel. +44 207 542 2402
Fax. +44 207 542 2699
Email. david.salter@...
Reuters Messaging. david.salter.reuters.com@...



   _____

From: Bakis Sirros [mailto:synth_freak_2000@...]
Sent: 02 February 2005 12:48
To: Doepfer_a100 group
Subject: [Doepfer_a100] doepfer monster suitcase and a174 schematics.


doepfer says:
"The "A-100 monster suitcase" has the same receptivity
as 8 normal A-100
suitcases (A-100G6) as it is has 168 HP and 12HU each.
The two cases
are
mounted face-to-face during transportation by means of
the middle
frame. The
pictures are still without bus boards, power supplies
and modules."







THE PICS WILL BE IN THE PHOTOS SECTION OF THE GROUP IN
ABOUT 10 MINUTES.
BAKIS.








=====
Bakis Siros
Parallel Worlds / Polariton
Athens-Greece
[Doepfer_a100] group owner
http://www.shimarecords.co.uk
http://www.ward12.com



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

I will keep my fingers crossed for these :-)

> dieter says:
>...... May be we will show also
> the prototypes of the new BBD and universal AD/DA
> module but that's quite uncertain.
> ...........
>
>
>
>
>
>
>
>
>
> =====
> Bakis Siros
> Parallel Worlds / Polariton
> Athens-Greece
> [Doepfer_a100] group owner
> http://www.shimarecords.co.uk
> http://www.ward12.com
>
>
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Mail - You care about security. So do we.
> http://promotions.yahoo.com/new_mail

> -----Ursprüngliche Nachricht-----
> Von: David Salter [mailto:david.salter@...]
> Gesendet: Donnerstag, 3. Februar 2005 10:34
> An: Doepfer_a100@yahoogroups.com
> Betreff: RE: [Doepfer_a100] doepfer monster suitcase and a174
> schematics.
>
> Ideas on cost?

not yet. So far we have only the price for the empty double suitcase. We
have to measure the time required to assembly the complete system (i.e. bus
boards, power supplies, wiring of the bus boards, power supplies and mains
inlets). And it will depend upon the quantity and type of power supplies (we
try 3 x A-100PSU2 for each half).

Best wishes
Dieter Doepfer

Is it possible to change the doeper SSM2044-Filter into a SSM2040
Filter, when you have such a chip?

To be honest, it would hurt. I think the SSM2044 Doepfer Filter is
one of the best doepfer filters.

> > Ideas on cost?
>
> not yet. So far we have only the price for the empty double suitcase.


I personally (and i know there are others like me) have custom racks with power
supplies already.

The monster case looks as if itll be easier than my skb cases, so i may well be
tempted into buying one.  But i (and others) already
have linear power supplies by powerone and the like -

As the power would be a substantial addition to the cost of the case, will there
be any chance that it would be offered without
power too?

Thankyou, Julian

An ideal solution (in my situation / opinion) would be some sort of power
connector on the outside of the case (is it 4 or 5 pin
xlrs that are often used for power?) such as the cases can be "daisy chained"
(lid and base, or even multiple cases with a large
enough psu)

The disadvantage would be that the psu would need an enclosure (thus adding to
the cost of that), and that a separate psu would be
needed to be transported.

The advantages would be:
In the case of a large psu, only one would be needed to be moved rather then
two.
The weight of the case may be sufficient that it may be nice to have the weighty
psu separate anyway.
Pricing could maybe be easy - just buy the case, and then the one size of psu
you need.
The case looks thin - no "module space" would then have to be lost in front of
the psu - the entire rail could be utilised.


And, i know most wouldn't be interested in this, but when im using the case
outside under battery power, i could just fit the right
lead / plug to my batteries, and plug them in to the same socket as id normally
plug the linear psu into (which is essentially how i
do it on my skb s at the moment)

Just some thoughts,

Julian

In case it wasnt clear - i ment have the psu outside the case all together (in
its own small enclosure - for saftey), not just chain
one suitcase half to another that houses the psu.

Julian

Going to bed now...

> -----Ursprüngliche Nachricht-----
> Von: Julian [mailto:julian@...]
> Gesendet: Freitag, 4. Februar 2005 02:16
> An: Doepfer_a100@yahoogroups.com
> Betreff: [Doepfer_a100] more thoughts on the monster case
>
> An ideal solution (in my situation / opinion) would be some sort
> of power connector on the outside of the case (is it 4 or 5 pin
> xlrs that are often used for power?) such as the cases can be
> "daisy chained" (lid and base, or even multiple cases with a large
> enough psu)

I'd not recommend this as the connections between PSU and bus boards should
be as short as possible due to voltage losses for long cables. But of course
I could ask our case manufacturer to drill a hole with the desired diameter
for XLR connector into the rear instead of the rectangle mains inlet.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Julian [mailto:julian@...]
> Gesendet: Freitag, 4. Februar 2005 02:00
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: [Doepfer_a100] doepfer monster suitcase and a174
> schematics.
>
> > > Ideas on cost?
>
> > not yet. So far we have only the price for the empty double suitcase.
>
> I personally (and i know there are others like me) have custom
> racks with power supplies already.
>
> The monster case looks as if itll be easier than my skb cases, so
> i may well be tempted into buying one.  But i (and others) already
> have linear power supplies by powerone and the like -
>
> As the power would be a substantial addition to the cost of the
> case, will there be any chance that it would be offered without
> power too?
>
> Thankyou, Julian

The empty "monster suitcase" will be about Euro 700.00 without bus boards
and power supplies. It is a lot of hardware and individually hand made by
our case manufacturer (no serial production). Three companies (except us)
are involved: the company for the 19" rails, threaded inserts and special
screws (ProMa), a second company that manufactures the metal side plates
with exactly positioned mounting holes required to fix the rails at the
right vertical positions (mounting the rails directly to the wooden side
plates of the case is not exactly enough, we tried this first for the
regular A-100 suitcase with bad results) and the (wodden) case manufacturer.

The suitcase includes these hardware parts:
16 x 19" rails that have to shortened to 168 HP manually (only 1 m rails
available from ProMa)
32 x threaded inserts with 84 HP each (no 168 HP available)
32 x special screws for rail mounting
4 x metal side plates for rail fixing

and of coure the actual flight case made from black wood, aluminium case
angles, duty ball corners, handles, rubber feet and so on. For the bus
boards and power supplies mounting more than 150 holes have to be drilled
into the rear of the case at the correct positions. For the mains inlets
rectangle holes have to be sawed into the rear.

For the complete case 16 bus boards and power supplies (~ 6 PSUII
recommended) have to be added, as well as the working time to assemble and
wire the bus boards and power supplies. The 32 bus boards are 35.00 each,
the PSUII 90.00 each. So the complete suitcase will be about 1750.00 as we
can give some discount for 16 bus boards and 6 PSUII. A lot of money, but
compared to the price of 8 standard A-100 suitcases (8 x 350.00 = 2800.00)
it is about 40% off. But exact price I cannot say before we have built the
first complete case.

Best wishes
Dieter Doepfer

Dear Members,

after the 14% price increase for the 19" frames (refer to my message from
January 21, 2005) we have now calculated the new prices for A-100G3, A-100G6
and A-100P. The price increase is 20.00 for the A-100G6 (6.7%) and 15.00 for
the A-100G3 (5.4%). The price for the suitcase version remains unchanged
(350.00 = 320.00 + 30.00 add. price for suitcase version).

I'm very sorry about this price increase but we cannot cushion a 14%
increase from the supplier. We are looking for cheaper case alternatives for
the future.

Best wishes
Dieter Doepfer


> -----Ursprüngliche Nachricht-----
> Von: Keld Sřrensen [mailto:keldsorensen@...]
> Gesendet: Mittwoch, 26. Januar 2005 17:09
> An: Doepfer_a100@yahoogroups.com
> Betreff: [Doepfer_a100] Re: group projects
>
>
>
>
> Yeah, this could be fun.
>
> Keld
>
> --- In Doepfer_a100@yahoogroups.com, Bakis Sirros
> <synth_freak_2000@y...> wrote:
> > hello list, josef,
> > ok, i decided  to start an a100 sound patching
> > project. actually, it is not a contest(there will not
> > be one winner) but a sound patching project. the theme
> > of the sound to be created will not be revealed until
> > end of february. the project will start end of
> > february and it will last for two months(to give the
> > time to any member to prepare some impressive
> > results). as i need extra space in the files section,
> > ingo zobel has agreed to provide me some extra space
> > in his website.
> > but this will start end of february.
> > more details when the time comes.
> > until then, keep on practicing and patching on your
> > a100 beast!
> > bakis.
> >
> >
> >
> >
> > --- Josef Mueller <joffes@m...> wrote:
> >
> > >
> > > > 'sound of the month' patch
> > >
> > > Great idea!
> > >
> > > Greetings from the Modular-Planet...
> > >
> > >
> > > --- In Doepfer_a100@yahoogroups.com, "nutrafx"
> > > <nutrafx@y...> wrote:
> > > >
> > > > the analogue systems group had a 'sound of the
> > > month' patch
> > > contest a
> > > > while ago and it did not last long.  this group
> > > has a lot more
> > > people
> > > > and a LOT more activity
> > > >
> > > > i think a friendly challenge of creative patching
> > > could be fun
> > > >
> > > > --- In Doepfer_a100@yahoogroups.com,
> > > "tomekrakowiak"
> > > > <tomekrakowiak@y...> wrote:
> > > > >
> > > > > also, was wondering (as being completely new to
> > > the group) if
> > > there
> > > > > are any projects/challenges involving people
> > > from here?
> > > ie: 'make a
> > > > > track of 3 minutes involving only 2 vcos" or
> > > something similar
> > > to
> > > > > that?
> > > > > cheers
> > > > > tomek
> > >
> > >
> > >
> > >
> >
> >
> > =====
> > Bakis Siros
> > Parallel Worlds / Polariton
> > Athens-Greece
> > [Doepfer_a100] group owner
> > http://www.shimarecords.co.uk
> > http://www.ward12.com
> >
> >
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Yahoo! Mail - You care about security. So do we.
> > http://promotions.yahoo.com/new_mail
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>

Hi

> Is it possible to change the doeper SSM2044-Filter into a SSM2040
> Filter, when you have such a chip?
No. While the 2044 is a Low-pass-only chip, the 2040 was a fourstage
TCA/Buffer-Chip, which could be used for different types of filter
circuits (similar to the roland IR3109).



Florian

> I'd not recommend this as the connections between PSU and bus boards should
> be as short as possible due to voltage losses for long cables.


Most using their own psu s are using powerones, and these have 'sense'
terminals.  Using these would relieve this issue, right?


Its interesting that the case is made from wood.  I hadnt expected that - i was
assuming aluminium construction, as per the existing
doepfer suitecase.  Im interested as to why wood was used as an option this time
arround. Surely itlld be heavier?

Thankyou, Julian

> -----Ursprüngliche Nachricht-----
> Von: Julian [mailto:julian@...]
> Gesendet: Freitag, 4. Februar 2005 13:00
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: [Doepfer_a100] more thoughts on the monster case
>
> > I'd not recommend this as the connections between PSU and bus boards
should
> > be as short as possible due to voltage losses for long cables.
>
> Most using their own psu s are using powerones, and these have
> 'sense' terminals.

But you have only one 'sense' terminal that does detect the correct voltage
only on one point. At this point the voltage will be correct. The voltages
at other points depend upon the length and diameter of the cables to these
points and the current for the corresponding cable. Short cables between PSU
and bus boards are the best solution unless you have a separate power supply
with sense terminal for each bus board. And I dont know what happens if the
total length of the sense line (i.e. length of the power cable and the sense
feedback cable) comes into the range of 1 m or even more. Probably ir
depends upon the power supply used and one has to try out.

> Its interesting that the case is made from wood.  I hadnt
> expected that - i was assuming aluminium construction, as per the existing
> doepfer suitecase.

The existing A-100 suitcase if made of wood as well.

Best wishes
Dieter Doepfer

Hi,

I just had to share this with the list: I tried to set up soft sync between
two A-111s, by driving one with the square wave of the other. Result was
that the pitch was wrong on almost every second note (almost like partial
SOU). Than I tried saw wave...

Saw wave drives slave A111 perfectly! And the sound is just so right,
usually finding perfect sweet spot after playing with octave switch on both
for a half minute. Try this!

Regards,

Zoran

Ok, it ain't Doepfer, but here's my system:

http://www.cyndustries.com/gallerypix/gall_les.jpg

The lower two rows are housed in a custom made "Anvil" style case I had
made for me by Clydesdale Cases, a Canadian Company.

http://www.clydesdalecases.com/

I sent them plans/measurements of exactly how I wanted it built and they
had no problem matching my specs. If you lay it down on its side, it
looks pretty much like the one here except that I've got a locking lid
on the front *and* back and no handle:

http://clydesdalecases.ca/images/computers/computers2b.jpg

You can plainly see the lid latches on the left and right of the case.
The mounting rails came undrilled - I drilled them myself. The front lid
has enough clearance inside that I can lock it on with the unit still
patched, which I sometime do for session work. I'll have the client come
here for patching, and then just slap the lid on to transport it to
whatever studio for recording. I'm pretty small myself, so I use a hand
truck to move it around. It's roughly 38" wide, 20" tall and 14" deep
without the covers on. The covers are around 4" deep.

I'm using two power supplies, one for each row. The supplies are
external and are mounted in Army Ammo Boxes like these:

http://www.surplusandadventure.com/ishop/800/shopscr2112.html

There a 4 pin male "screw-lock" type connectors on each ammo box and two
matching male connectors on the case with matching female connectors on
the cables. They lock down nice and tight. If you look carefully right
above the Doepfer Ribbon Controller, you can see one of the power supply
cables terminating just behind the lid latch.

The case is built like a tank, and the silver metal plating on the
outside is not only tough as nails, it make for great RF rejection as
well. I spent less than $300 US for the case and maybe another $300 for
the Power Supplies. The Ammo Boxes were about $20 at the local surplus
store. So, I've got a little over $600 invested in everything except the
modules.

I made three mistakes, which I'll happily list here so nobody else makes
the same mistakes:

1. It's too deep. I could have knocked a couple of inches off and it
would take up less room when transporting.

2. I didn't set the mounting rails far enough in. They should have been
maybe two inches deeper set than they are. This would have provided a
little better protection for the knobs. I've never had an accident though.

3. Drilling the rails was a PITA! Next time I'll get somebody else to do
it!!

Wasn't hard to pull this off. A very similar case could be done for
Doepfer systems, just scale the size down a bit.

Cheers!

--
-----------
Les Mizzell

Just wondering if anyone is interested in buying some modules.
I live in Australia, so a local sale would be good but not
essential.
I have the following,

111 High end VCO
110 Standard VCO
145 LFO
121 Multimode VCF
140 Env Gen
131 VCA
138 Mixer - exp
118 Noise source
139 Headphone amp

I've got an Analogue Systems adapter module I'll throw in if
someone buys more than one module? : )

Offers accepted.
Note : no power supply or case are available for sale.

Cheers - Jeremy.

Hi Zoran,
hmmm, ..and what is the question?
sync is driven using saw waves as is must to and then performs as it should....

Best Regards,

Josue.

On Fri, 04 Feb 2005 19:26:38 +0000, Zoran Bosnjak <dj_allin@...> wrote:
>
> Hi,
>
> I just had to share this with the list: I tried to set up soft sync between
> two A-111s, by driving one with the square wave of the other. Result was
> that the pitch was wrong on almost every second note (almost like partial
> SOU). Than I tried saw wave...
>
> Saw wave drives slave A111 perfectly! And the sound is just so right,
> usually finding perfect sweet spot after playing with octave switch on both
> for a half minute. Try this!
>
> Regards,
>
> Zoran
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

I thought that soft sync had to be driven with square wave, just like hard
sync. Your comment is making me realize I made a pretty big mistake.


Zoran


>From: Josue Arias <josue.arias@...>
>Reply-To: Doepfer_a100@yahoogroups.com
>To: Doepfer_a100@yahoogroups.com
>Subject: Re: [Doepfer_a100] Soft Sync on A111
>Date: Sat, 5 Feb 2005 17:39:29 +0100
>
>Hi Zoran,
>hmmm, ..and what is the question?
>sync is driven using saw waves as is must to and then performs as it
>should....
>
>Best Regards,
>
>Josue.
>
>On Fri, 04 Feb 2005 19:26:38 +0000, Zoran Bosnjak <dj_allin@...>
>wrote:
> >
> > Hi,
> >
> > I just had to share this with the list: I tried to set up soft sync
>between
> > two A-111s, by driving one with the square wave of the other. Result was
> > that the pitch was wrong on almost every second note (almost like
>partial
> > SOU). Than I tried saw wave...
> >
> > Saw wave drives slave A111 perfectly! And the sound is just so right,
> > usually finding perfect sweet spot after playing with octave switch on
>both
> > for a half minute. Try this!
> >
> > Regards,
> >
> > Zoran
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >

Hi Zoran

> I thought that soft sync had to be driven with square wave, just like hard
> sync. Your comment is making me realize I made a pretty big mistake.
Neither you nor Josue are right. There are different ways to sync the
CEM3340. The A-111 requires a negative pulse in the softsync input.
A detailled description can be found in the datasheet of the CEM-3340.

Florian

Hi Zoran, no problem :)

Anyway, hard sync use a saw wave too, not a square wave... May be is
working with a square but the circuit expect to see a rising or
falling edge , not an instant on-off state as a trigger or square.

Best Regards,

Josue.


On Sat, 05 Feb 2005 18:31:04 +0000, Zoran Bosnjak <dj_allin@...> wrote:
>
> I thought that soft sync had to be driven with square wave, just like hard
> sync. Your comment is making me realize I made a pretty big mistake.
>
> Zoran
>
> >From: Josue Arias <josue.arias@...>
> >Reply-To: Doepfer_a100@yahoogroups.com
> >To: Doepfer_a100@yahoogroups.com
> >Subject: Re: [Doepfer_a100] Soft Sync on A111
> >Date: Sat, 5 Feb 2005 17:39:29 +0100
> >
> >Hi Zoran,
> >hmmm, ..and what is the question?
> >sync is driven using saw waves as is must to and then performs as it
> >should....
> >
> >Best Regards,
> >
> >Josue.
> >
> >On Fri, 04 Feb 2005 19:26:38 +0000, Zoran Bosnjak <dj_allin@...>
> >wrote:
> > >
> > > Hi,
> > >
> > > I just had to share this with the list: I tried to set up soft sync
> >between
> > > two A-111s, by driving one with the square wave of the other. Result was
> > > that the pitch was wrong on almost every second note (almost like
> >partial
> > > SOU). Than I tried saw wave...
> > >
> > > Saw wave drives slave A111 perfectly! And the sound is just so right,
> > > usually finding perfect sweet spot after playing with octave switch on
> >both
> > > for a half minute. Try this!
> > >
> > > Regards,
> > >
> > > Zoran
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
>
>
> Yahoo! Groups Links
>
>
>
>
>

I tried to drive slave with inverted square, following Florian's advice.
Success, of course. Thanks for the help! My modular toy is showing character
I did not know it had.

Once you run A111 as slave, FM it from third oscillator. Adjust pulse of the
square wave form to the point where it almost disappears. Than apply LFO to
Pulse width.  Filter to the taste. Man, fun never ends.

Maybe I should finally buy that Frequncy Shifter...

Regards,

Zoran

>From: Josue Arias <josue.arias@...>
>Reply-To: Doepfer_a100@yahoogroups.com
>To: Doepfer_a100@yahoogroups.com
>Subject: Re: [Doepfer_a100] Soft Sync on A111
>Date: Sun, 6 Feb 2005 03:06:41 +0100
>
>Hi Zoran, no problem :)
>
>Anyway, hard sync use a saw wave too, not a square wave... May be is
>working with a square but the circuit expect to see a rising or
>falling edge , not an instant on-off state as a trigger or square.
>
>Best Regards,
>
>Josue.
>
>
>On Sat, 05 Feb 2005 18:31:04 +0000, Zoran Bosnjak <dj_allin@...>
>wrote:
> >
> > I thought that soft sync had to be driven with square wave, just like
>hard
> > sync. Your comment is making me realize I made a pretty big mistake.
> >
> > Zoran
> >
> > >From: Josue Arias <josue.arias@...>
> > >Reply-To: Doepfer_a100@yahoogroups.com
> > >To: Doepfer_a100@yahoogroups.com
> > >Subject: Re: [Doepfer_a100] Soft Sync on A111
> > >Date: Sat, 5 Feb 2005 17:39:29 +0100
> > >
> > >Hi Zoran,
> > >hmmm, ..and what is the question?
> > >sync is driven using saw waves as is must to and then performs as it
> > >should....
> > >
> > >Best Regards,
> > >
> > >Josue.
> > >
> > >On Fri, 04 Feb 2005 19:26:38 +0000, Zoran Bosnjak
><dj_allin@...>
> > >wrote:
> > > >
> > > > Hi,
> > > >
> > > > I just had to share this with the list: I tried to set up soft sync
> > >between
> > > > two A-111s, by driving one with the square wave of the other. Result
>was
> > > > that the pitch was wrong on almost every second note (almost like
> > >partial
> > > > SOU). Than I tried saw wave...
> > > >
> > > > Saw wave drives slave A111 perfectly! And the sound is just so
>right,
> > > > usually finding perfect sweet spot after playing with octave switch
>on
> > >both
> > > > for a half minute. Try this!
> > > >
> > > > Regards,
> > > >
> > > > Zoran
> > > >
> > > >
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >

Hi Florian,

You are wrong about the A111...The A111 uses a CEM 3340 but the module
is not a raw CEM module, it have circuits around the sync inputs,
comparators I think so it needs to see a rising or falling edge as all
VCOs.
You can check the Manual.

Best Regards,

Josue.




On Sat, 05 Feb 2005 23:29:28 +0100, Florian Anwander
<Florian.Anwander@...> wrote:
>
> Hi Zoran
>
> > I thought that soft sync had to be driven with square wave, just like hard
> > sync. Your comment is making me realize I made a pretty big mistake.
> Neither you nor Josue are right. There are different ways to sync the
> CEM3340. The A-111 requires a negative pulse in the softsync input.
> A detailled description can be found in the datasheet of the CEM-3340.
>
> Florian
>
>
>
> Yahoo! Groups Links
>
>
>
>
>

Hi Josue

> You are wrong about the A111...The A111 uses a CEM 3340 but the module
> is not a raw CEM module, it have circuits around the sync inputs,
> comparators I think so it needs to see a rising or falling edge as all
> VCOs.
> You can check the Manual.
The schematic of the A111 shows the blank input for the Pin 9 of the
CEM3340 (only additions are a pull down resistor and a zener diode for
eleminating positive signals (schemo see page 1 of the service manual
and explanation page 7). So beside of the zenerdiode and the pulldown,
the Softsync input is designed as suggested in the datasheet.

The Datasheet says for this connection on page 6:
"[...]Finally, the  oscillator may be soft synchronized by negative
pulses applied to the threshold voltage pin (pin 9 of 3340[...]). These
pulses cause the triangle upper peak to reverse direction prematurely,
causing the oscillation period to be an integral multiple of the pulse
periode. [...]"

So according to the Doepfer schematics, the Curtis datasheet and - as
minor argument - to my experience, a simple short pulse is perfect to be
used as soft syncs master signal. Of course a saw will do something
similar, but that shouldn't prevent you to try a pulse. ;-)


Florian

> -----Ursprüngliche Nachricht-----
> Von: Josue Arias [mailto:josue.arias@...]
> Gesendet: Sonntag, 6. Februar 2005 12:59
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: [Doepfer_a100] Soft Sync on A111
>
>
>
> Hi Florian,
>
> You are wrong about the A111...The A111 uses a CEM 3340 but the module
> is not a raw CEM module, it have circuits around the sync inputs,
> comparators I think so it needs to see a rising or falling edge as all
VCOs.

No. The hard and soft sync inputs have no additional circuits but are
connected directly to the corresponding sockets of the A-111. Only pull down
resistors (if no signal is connected to the sockets) and z-diodes for input
protection/voltage limitation are used.

Best wishes
Dieter Doepfer