electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
go to the radio page Live at electro-music.com radio 1 Please visit the chat
  host / artist show at your time
today> Modulator ESP Adventures In Sound
 Forum index » DIY Hardware and Software
SSM2044 VCF schematic and PCB layout
Post new topic   Reply to topic Moderators: jksuperstar, Scott Stites, Uncle Krunkus
Page 1 of 3 [53 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Goto page: 1, 2, 3 Next
Author Message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Tue Jan 30, 2007 2:53 am    Post subject: SSM2044 VCF schematic and PCB layout Reply with quote  Mark this post and the followings unread

i all,

i built a ssm2044 based VCF circuit yesterday and since there're less schematics for the 2044 out there i thought it would be of some interest?!

any comments are welcome, i am always willing to learn and to do it better next time...

SSM2044 VCF PCB & schematic

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
richardc64



Joined: Jun 01, 2006
Posts: 677
Location: NYC
Audio files: 26

PostPosted: Tue Jan 30, 2007 4:55 am    Post subject: Re: SSM2044 VCF schematic and PCB layout Reply with quote  Mark this post and the followings unread

Very nice.

fonik wrote:
do it better next time...



What are you, some kinda perfectionist?
Back to top
View user's profile Send private message Visit poster's website
softfin



Joined: Oct 11, 2006
Posts: 271
Location: Far in the north
Audio files: 1

PostPosted: Tue Jan 30, 2007 5:07 am    Post subject: Reply with quote  Mark this post and the followings unread

Very Happy I got some SSM2044s a while ago and I was working on a ssm2044 project as well, based on the ssm2044 datasheet app note and polysix schematic.. It's still unfinished though, perhaps I should try out veroboarding your version.

It looks promising at least on the first glance. Can you describe how does it sound like ?
Thanks for sharing your ideas!

Best,
softfin
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Tue Jan 30, 2007 5:19 am    Post subject: Reply with quote  Mark this post and the followings unread

softfin wrote:
Can you describe how does it sound like?

unfortunately not! why? well, i tested the circuit with the B-N-Tic Filter used as VCO. Shocked this thing sounds really strange!
no way to say anything about a specific character of sound of the filter...

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
vtl5c3



Joined: Sep 08, 2006
Posts: 425
Location: PDX
Audio files: 13

PostPosted: Tue Jan 30, 2007 8:54 am    Post subject: Reply with quote  Mark this post and the followings unread

I have a homemade 2044 VCF that I've used for years. It's amazingly warm for a VCF built off a monolithic IC... not as warm and crazy as its predecessor, the SSM2040, but much more character than the CEM3320. I have read that it's supposed to be a "moog ladder on a chip" but I've never seen any evidence to back that up.

One of my favorite tricks is to modulate its frequency with three sources: 1) analog sequencer 2) LFO 3) sequenced VCO that moves in and out of audio ranges. For extra fun, turn up the Q a bit and modulate the Q input with another LFO.


softfin wrote:
Very Happy I got some SSM2044s a while ago and I was working on a ssm2044 project as well, based on the ssm2044 datasheet app note and polysix schematic.. It's still unfinished though, perhaps I should try out veroboarding your version.

It looks promising at least on the first glance. Can you describe how does it sound like ?
Thanks for sharing your ideas!

Best,
softfin
Back to top
View user's profile Send private message
mono-poly



Joined: Jul 07, 2004
Posts: 937
Location: Rotterdam, Netherlands
Audio files: 2

PostPosted: Tue Jan 30, 2007 9:35 am    Post subject: Reply with quote  Mark this post and the followings unread

There is a good layout in the 2044 technical manual.
Witch you can download on a dozen sites.
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Tue Jan 30, 2007 10:49 am    Post subject: Reply with quote  Mark this post and the followings unread

mono-poly wrote:
There is a good layout in the 2044 technical manual.
Witch you can download on a dozen sites.


this is great news. could you point me to one of these sites? there's some interest on the german synthesizer forum as well. they'd be glad to have some more documentation (i'm still not able to find these info - thanks to my lack of google skills)

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
fluxmonkey



Joined: Jun 24, 2005
Posts: 708
Location: cleve

PostPosted: Wed Jan 31, 2007 7:35 am    Post subject: Reply with quote  Mark this post and the followings unread

there's also a circuit, originally from Polyphony magazine:

http://www.emulatorarchive.com/assets/PDF/SSM2033%20SSM2044%20Circuits.pdf

this uses a 3080 to create a reverse-log response for the VCQ, which is kind of nice... otherwise, looks very similar to what you've done. thanks as always for sharing, fonik!

bbob
Back to top
View user's profile Send private message
synth_ollie



Joined: Sep 11, 2006
Posts: 149
Location: sweden

PostPosted: Wed Jan 31, 2007 9:33 am    Post subject: Reply with quote  Mark this post and the followings unread

http://www.analog-synth.de/synths/mod2/ssmlowpass/ssmlowpass.htm
Back to top
View user's profile Send private message
funkyfarm



Joined: Jan 21, 2007
Posts: 583
Location: France
Audio files: 3

PostPosted: Wed Feb 14, 2007 6:43 am    Post subject: Re: SSM2044 VCF schematic and PCB layout Reply with quote  Mark this post and the followings unread

fonik wrote:
i all,

i built a ssm2044 based VCF circuit yesterday and since there're less schematics for the 2044 out there i thought it would be of some interest?!

any comments are welcome, i am always willing to learn and to do it better next time...

SSM2044 VCF PCB & schematic


What a great work !
I wish my "photoshop" pcbs look like this...

I have the polyphony one a breadboard ; here's a very short movie featuring the 2044, three Oakley VCO and my lab assistant turning buttons Cool

3x1o3+2044

Last edited by funkyfarm on Wed Feb 14, 2007 6:46 am; edited 1 time in total
Back to top
View user's profile Send private message
funkyfarm



Joined: Jan 21, 2007
Posts: 583
Location: France
Audio files: 3

PostPosted: Sun Feb 25, 2007 3:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

I guess I will etch the pcb for real, as the IC deservers its own...

Isn't there any Q compensation in the SSM2044 ? for volume drop ?
i find my polyphony version VCF to quite significantly drop volume as Q is raised...
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Sun Feb 25, 2007 11:40 pm    Post subject: Reply with quote  Mark this post and the followings unread

funkyfarm wrote:
Isn't there any Q compensation in the SSM2044 ? for volume drop ?
i find my polyphony version VCF to quite significantly drop volume as Q is raised...

this is a specific _feature_ of the ssm filter, i think Confused
AFAIK it's typical...

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
funkyfarm



Joined: Jan 21, 2007
Posts: 583
Location: France
Audio files: 3

PostPosted: Mon Feb 26, 2007 4:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
funkyfarm wrote:
Isn't there any Q compensation in the SSM2044 ? for volume drop ?
i find my polyphony version VCF to quite significantly drop volume as Q is raised...

this is a specific _feature_ of the ssm filter, i think Confused
AFAIK it's typical...


Oh for sure ?

Even the superstar 2040 ? no Q compensation ?
Back to top
View user's profile Send private message
State Machine
Janitor
Janitor


Joined: Apr 17, 2006
Posts: 2809
Location: New York
Audio files: 24

PostPosted: Mon Feb 26, 2007 6:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
any comments are welcome, i am always willing to learn and to do it better next time...


Layout looks great! I really like your website also !

Seems like a good deal on SSM2044's on Ebay .....

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290056937066&ssPageName=MERC_VI_RUPX_Pr4_PcY_BIN_Stores_IT&refitem=290005409382&itemcount=4&refwidgetloc=active_view_item&usedrule1=UpSell_LogicX&refwidgettype=cross_promot_widget

Bill
Back to top
View user's profile Send private message Send e-mail
mono-poly



Joined: Jul 07, 2004
Posts: 937
Location: Rotterdam, Netherlands
Audio files: 2

PostPosted: Tue Feb 27, 2007 1:50 am    Post subject: Reply with quote  Mark this post and the followings unread

I would stay away from that seller.
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Tue Feb 27, 2007 1:55 am    Post subject: Reply with quote  Mark this post and the followings unread

unfortunately i am not able to access ebay right now (i'm at work), but if it's the hongkongsuperseller:
i know that where many complains about this seller.
a friend of mine has dealed with him several times (espacially the ssm chips) and he allways got what he ordered...

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
State Machine
Janitor
Janitor


Joined: Apr 17, 2006
Posts: 2809
Location: New York
Audio files: 24

PostPosted: Tue Feb 27, 2007 4:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
I would stay away from that seller.


Really? His feedback looks fairly good. What experience have you had with this seller? Can you site an example for me?

Thanks,
Bill
Back to top
View user's profile Send private message Send e-mail
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Tue Feb 27, 2007 11:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

funkyfarm wrote:
fonik wrote:
funkyfarm wrote:
Isn't there any Q compensation in the SSM2044 ? for volume drop ?
i find my polyphony version VCF to quite significantly drop volume as Q is raised...

this is a specific _feature_ of the ssm filter, i think Confused
AFAIK it's typical...


Oh for sure ?

Even the superstar 2040 ? no Q compensation ?

the datasheets for ssm2040/44 don't say nothing about it... i breadboarded that circuit and i couldn't hear a dramatic volume drop. not that i was looking for it, i just wanted to see if the circuit works.

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
mono-poly



Joined: Jul 07, 2004
Posts: 937
Location: Rotterdam, Netherlands
Audio files: 2

PostPosted: Wed Feb 28, 2007 5:06 am    Post subject: Reply with quote  Mark this post and the followings unread

Smile
Last edited by mono-poly on Wed Feb 28, 2007 5:10 am; edited 1 time in total
Back to top
View user's profile Send private message
mono-poly



Joined: Jul 07, 2004
Posts: 937
Location: Rotterdam, Netherlands
Audio files: 2

PostPosted: Wed Feb 28, 2007 5:08 am    Post subject: Reply with quote  Mark this post and the followings unread

State Machine wrote:
Quote:
I would stay away from that seller.


Really? His feedback looks fairly good. What experience have you had with this seller? Can you site an example for me?

Thanks,
Bill


http://www.nabble.com/RE:bad-trader-hongkongsuperseller-t1655714.html

http://www.nabble.com/bad-trader---hongkongsuperseller-t1634133.html
Back to top
View user's profile Send private message
v-un-v
Janitor
Janitor


Joined: May 16, 2005
Posts: 8933
Location: Birmingham, England, UK
Audio files: 11
G2 patch files: 1

PostPosted: Wed Feb 28, 2007 6:41 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
First thank you for your purchase and the phone number too.
I've had to as you maybe notice sell IC on a new profile NOT
hongkongsuperseller who is NOT involved with us but is rather one of
dozens
of profiles used by HK mafia. Last year they sold phony chinese antique
furniture with this profile to build it up!

I have had to try to answer this question many time now this week and
will copy below some I am trying to answer as well as possible. The
problem is growing and is too bad. As we've try to warn many including
OEM such as Doepfer.

This seller is trying to destroy us and then take over by selling IC
they know we carry and stock but disguised for what they really are not!


We only sell new ICs.
The other person(s) sell IC pulled at recycleing center in China.
They have moved in on our items to sell more and more. So to counter
them
we have devalued all items they sell by selling the same
at less. You may or not notice many items we now sell are very
different.
And we will be adding more.
But unfortunately this is probably all to much a waste of time because
this
seller is only one of dozens of profiles the mafia in Hong Kong use
to sell many items. Just last year this profile was called chinese art
and
furntire. They last years sold counterfeit chinese antiques!
And since a little by little have moved in on our products and have been
harassings us in many ways. Damaging our business sales
which means we CANNOT AFFORD TO REPRODUCE ITEMS that they only too much
do
not care about only to make quick sales
before a new profile is made. By the end of the year they will sell
only
different things than today I know this.
I mention all these things because I know their is talk now. We are not
this group and will not be able to survive without our customers
education
of this matter and support. Thay started with mn3005 which are really
only
3008 pulled from scrap pcbs and restamped.
This was nearly 1 year ago and have moved to more and more things now.
The
ssm2044 they are selling was purchased in a large lot
unnowingly from our company. To help make them look more ligitimates.
Next when we offered large lots last summer of 3080A for the synth
community
such as DIY to take advantage of before they were all gone. Right after
they started to sell 3080 which are all pulled from pcbs.

Have now halted dozens of our projects indefinetely and this only hurt
us
and those who enjoy our items.
We have in fact halted most IC sales last year and now for nearly 6
months
because they want to acquire many for counterfeiting.
We do expect uA726 to appear very soon counterfeited.
It is important to know we have contacted ebay many times in the past
year
and explained that they cannot help if people (customers) do not
complain.
But they hide their feedback now! And daily cancel our auctions and
send us
computer viruses to slow us.
Ebay will do nothing to help and in fact the last complaint we made they
took away our power seller privelages because the hongkongsuperseller
was
complains to ebay we were spamming by listing 2044 with multiple
manufacturer names.
After we stop to sell they then began to sell the lots we sold to them
to
devalue them. If not by now using only the photo and selling
counterfeits.
Most our clients to only know this many months or years after because
they
will not repair or use much later after the purchase!
You may be asking why bother is this so much to sell?
Yes because as the auction you state I sold 5 pcs. sa571 for $2. For
every
auction, we receive at least 4,5,6 email a month for large
lot purchases from OEM. Such as 500,1000, 5000 pcs. of IC or other!
Whic I explain again is what funds our R&D to develop other items. And
for
them to make such sales
only funds HK mafia to support paying those in mainland China working
for
them $60-$80 a month.
Usually children working 8-10 hours 7 days a week pulling these IC and
sandpapering them to look new!
So please understand our position which I know too difficult for western

people to concept. It is very different in Asia!
How much time to make an IC look new do you think it maybe takes? And
they
are not just a few hundreds, thousands.
It is millions of parts pulled from millions of pcbs from all over the
world
to resell to the 'stupid foreigners' their own trash!
Most of the 3207/3007 they are resllings are counterfeit too or pulled
from
karaoke, washing machines and sewing machines!
This maybe all to boring for you and sorry to email such things. But I
again ask as before to help understand the growing problem
before we are gone for people to change what they sell on any moment.
Paying $1 ea. for 3080 that are trash that last year we sold
as a courtesy for not even $.50 ea! and to warn they were
disappearings. I
don't understand?
So I can sell these IC to you as you asked but hope that you can spread
this
message so that this lot I sell you has the same effect
as our ads. But only this time please. And please now it is not
helping us
to buy IC lots we find to sell.
We have many IC now we purchased. But cannot offer them because of this

other seller and our fears! We don't want people ripped
off from what information and work we provide! In the last 6 months I
have
purchased nearly 25,000 rare bbd and cem, ssm chips I cannot even sale!
It
is a very sad and bad things for us. But we will wait it the best we
can
and try to survive these things.
We have gone through many bad times here and bad things in the past so
who
knows.
Again, please tell others about this problem to help.

People must be first understand that if there is a 'rare' IC in China.
We have 6 people all day every day that look and buy such items. If it
is around. We buy it ALL! And because of this problem is one reason
why we must.

We are the ONLY stockist of such ICs. It is our business line. Please
review the hongkongsellers 'business line'. It makes no sense!
And like most Chinese is whatever they can 'DUMP' into a foreign
country.
One week Chinese furniture, the next synthesizer parts.

Some tips I will give buyers.

LOOK at the price! If it is too low get real!
LOOK at the stamp. The world's largest electroinics company Panasonic
is not going to have ICs that are poorly stamped! Think about this!
LOOK at the PHOTO
LOOK at the legs. Are they shiny like solder? Or bent?
LOOK at the tube. Does it say panasonic? Beiling, Harris?

Last, LOOK at the SELLER.
We have worked very hard to help people for years now. With only one
focus.

Without the community support and reporting this to Ebay I assure you
this is ONLY THE BEGINNING of what will be coming. I live here and can
know these things crawling around in this toilet in China!

Please feel feel to copy this to any groups.

Sincerely,
cy


Shocked

And I too always thought that ebay feedback counted?

One to avoid then?

_________________
ACHTUNG!
ALLES TURISTEN UND NONTEKNISCHEN LOOKENPEEPERS!
DAS KOMPUTERMASCHINE IST NICHT FÜR DER GEFINGERPOKEN UND MITTENGRABEN! ODERWISE IST EASY TO SCHNAPPEN DER SPRINGENWERK, BLOWENFUSEN UND POPPENCORKEN MIT SPITZENSPARKSEN.
IST NICHT FÜR GEWERKEN BEI DUMMKOPFEN. DER RUBBERNECKEN SIGHTSEEREN KEEPEN DAS COTTONPICKEN HÄNDER IN DAS POCKETS MUSS.
ZO RELAXEN UND WATSCHEN DER BLINKENLICHTEN.
Back to top
View user's profile Send private message Send e-mail
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Wed Feb 28, 2007 7:44 am    Post subject: Reply with quote  Mark this post and the followings unread

v-un-v wrote:
Quote:
...ssm2044 they are selling was purchased in a large lot unnowingly from our company. To help make them look more ligitimates...


ah, that shades a little light on the POSITIVE experiences this friend of mine had with hkss.

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
3phase



Joined: Jul 27, 2004
Posts: 1182
Location: Berlin
Audio files: 13
G2 patch files: 141

PostPosted: Mon Mar 05, 2007 10:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

just one thing about the pcb and schematics,

I started to experiment with more expensiv op amps and found areas where i got significantly better results than with tl082 when using opa2134.
Sometimes as significant that i dont like to use TL´s in the audiopath if possible..
I even modified my drummachine..and it just sounds better...
problem. There is no 4 op chip availible anymore, only 1 and 2 op amp packages in 8 pin housings. Same applies to many other highend opamps. Often only singel opamp chips are availible..but that is only for the real expensiv ones.

What i want to suggest is to avoid 4 op amp chips in audio circuits where possible to allow modifications and experimentation with high end audio op amps.

i cant really say if its worth the hazzle yet..have to do some experiments..just can say that i like the sound of the OPA´s much more than the somhow more grainy sound of the TL´s...
The OPA´s have a finer and warmer sound...less harsh more silky...
especially in stages that amplify this gets vissible...
In others the change is maybe not big enough to justify the 10 times higher cost than a TL...but it might be still good to have the option.
Back to top
View user's profile Send private message Send e-mail Visit poster's website
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Mon Mar 05, 2007 11:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

3phase wrote:
What i want to suggest is to avoid 4 op amp chips in audio circuits where possible to allow modifications and experimentation with high end audio op amps.

good point. maybe we can do a small run of PCBs? i would modify the layout then... i even thought of a run of realy cheap PCBs (single sided without silkscreen or even solder mask).
or is there any interest in a set of PCB+ssm2044?

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
kryptic



Joined: Feb 16, 2007
Posts: 40
Location: somewhere

PostPosted: Tue Mar 06, 2007 3:49 am    Post subject: Reply with quote  Mark this post and the followings unread

v-un-v wrote:
Shocked

And I too always thought that ebay feedback counted?

One to avoid then?


I know many people that have had very positive experiences with hkss. I would not put too much stock in that far fetched story about the HK mafia. There was many discussions on a lot of boards after that cy guy started posting stories on several different forums and from what I recall, evidence turned up that it was actually one of hkss' competitors trying to smear his image on the internet with false stories about links to the mafia. Notice how at the end of his post he encourages everyone to copy his story and spread it all around the internet to other boards. That is probably one of the reasons the story became so wide spread. If it were true, you would think his feedback would be much lower. My friends who have dealt with him have all had positive experiences....just my two cents. Smile
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: jksuperstar, Scott Stites, Uncle Krunkus
Page 1 of 3 [53 Posts]
View unread posts
View new posts in the last week
Goto page: 1, 2, 3 Next
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use