--- In xpantastic@..., Karl Schmeer <shire03@...> wrote:
Hi,
I have a M12 and believe it or not, there are times I wish I had an Xpander. It would be nice sometimes to have the CV ins and the output per voice. (Currently my M12 does not have the individual outputs.)????
Interested in a swap??
|
Having owned a M12 for over a decade and a polyevolver for 3 years, I disagree with the statement that the polyevolver keyboard is "just as clunky". Can't speak to the A6. Specifically, keydepth on the polyevolver is noticeably deeper and more satisfactory. In all cases the SOUND of the M12 is superior however but it is the worst keyboard depth I have experienced. Although some of ?the arp synths, like the Quadra were close. YMMV.
toggle quoted message
Show quoted text
On Thu, Jan 14, 2010 at 5:06 AM, PeWe <ha-pewe@...> wrote:
?
Hello Karl !
>>>
Karl Schmeer schrieb:
?
|
Hi,
I have a M12 and believe it or not, there are times I wish
I had an Xpander. It would be nice sometimes to have the CV ins and the
output per voice. (Currently my M12 does not have the individual
outputs.)?
|
Yep,- in multi patch mode and playing different patches via different
midi channels, the separate outputs for each voice are a great
approvement.
Next,- I have my Minimoog modded w/ keyboards CV and gate outs,- so I
can trigger one voice of the Xpander by CV/Gate, doubling the Moog,
using the other 5 voices? w/ midi,- just an example ...
|
?
You would think that 12 voices layered up in mono mode
would be a thicker solo sound, but it doesn't work that way. With 12
analog voices droning,?phase differences start
canceling out some of the voices. So at the end of the day
6 voices layered up is just?as
thick as 12 IMO.
|
Right, but there?s difference between M12 and Xpander,-? layering all
the voices (or only 6 maybe) in unison,- the detune page, which the
Xpander doesn?t have.
It?s only a detail, but also a small advantage, being able to select
the same single patch in every multi-patch slot, setting the voice
assignment to unison and easily detune all the voices against each
other.
THIS is not possible w/ a Xpander,- instead, you have to copy the same
single patch to six single-patch memory locations, edit each of these
for different tunings and store, before you?re able to set up a
multi-patch-unison-detune sound the way you can do in a M12.
Will say,- you lose 5 more single-patch memory locations in the Xpander
to do this, but not in the Matrix-12.
B.t.w.,- I never layer the voices that way w/ my Xpander,- so I don?t
care.
Voice cancelations are always happening by layering exactly same sounds
and detuneing ?em,- so I prefer layering of slightly different sounds,-
best different synths,- even these do similar sounding patches then, -
lets say creating a super saw,- together.
According to the keyboard,- I never liked the keyboards/keybeds of the
Oberheim synths much,- not in the OBX nor the OBXa or OB-8 and I
absolutly don?t like the levers for pitch bending,- I prefer wheels,-
best non sprung wheels,- like the Minimoog has.
So,- the Xpander was best choice for me,- also because of size and
weight.
In addition, Obies keyboard synths are relatively large beasts.
I never toured w/ a Matrix-12, but I got probs w/ the stiffness of the
enclosure of my former OB-8 in the past,- maybe a prob which also
happens w/ a Matrix-12.
With the OB-8, this stressed the circuit boards mounted on the bottom
of the case.
|
?
Oh Yeah, but your Xpander also does this.
?
b.t.w.
I have played the A6 Andromada and DSI stuff. IMO The
keyboards on these synths are just as clunky as the M12.??
?
??
Karl Schmeer
??
|
|
Hello Karl !
>>>
Karl Schmeer schrieb:
?
|
Hi,
I have a M12 and believe it or not, there are times I wish
I had an Xpander. It would be nice sometimes to have the CV ins and the
output per voice. (Currently my M12 does not have the individual
outputs.)?
|
Yep,- in multi patch mode and playing different patches via different
midi channels, the separate outputs for each voice are a great
approvement.
Next,- I have my Minimoog modded w/ keyboards CV and gate outs,- so I
can trigger one voice of the Xpander by CV/Gate, doubling the Moog,
using the other 5 voices? w/ midi,- just an example ...
|
?
You would think that 12 voices layered up in mono mode
would be a thicker solo sound, but it doesn't work that way. With 12
analog voices droning,?phase differences start
canceling out some of the voices. So at the end of the day
6 voices layered up is just?as
thick as 12 IMO.
|
Right, but there?s difference between M12 and Xpander,-? layering all
the voices (or only 6 maybe) in unison,- the detune page, which the
Xpander doesn?t have.
It?s only a detail, but also a small advantage, being able to select
the same single patch in every multi-patch slot, setting the voice
assignment to unison and easily detune all the voices against each
other.
THIS is not possible w/ a Xpander,- instead, you have to copy the same
single patch to six single-patch memory locations, edit each of these
for different tunings and store, before you?re able to set up a
multi-patch-unison-detune sound the way you can do in a M12.
Will say,- you lose 5 more single-patch memory locations in the Xpander
to do this, but not in the Matrix-12.
B.t.w.,- I never layer the voices that way w/ my Xpander,- so I don?t
care.
Voice cancelations are always happening by layering exactly same sounds
and detuneing ?em,- so I prefer layering of slightly different sounds,-
best different synths,- even these do similar sounding patches then, -
lets say creating a super saw,- together.
According to the keyboard,- I never liked the keyboards/keybeds of the
Oberheim synths much,- not in the OBX nor the OBXa or OB-8 and I
absolutly don?t like the levers for pitch bending,- I prefer wheels,-
best non sprung wheels,- like the Minimoog has.
So,- the Xpander was best choice for me,- also because of size and
weight.
In addition, Obies keyboard synths are relatively large beasts.
I never toured w/ a Matrix-12, but I got probs w/ the stiffness of the
enclosure of my former OB-8 in the past,- maybe a prob which also
happens w/ a Matrix-12.
With the OB-8, this stressed the circuit boards mounted on the bottom
of the case.
|
?
Oh Yeah, but your Xpander also does this.
?
b.t.w.
I have played the A6 Andromada and DSI stuff. IMO The
keyboards on these synths are just as clunky as the M12.??
?
??
Karl Schmeer
??
|
|
Hi,
?
Just a thought, If you come across a trashed Chroma Polaris, These have the same VCO,s in them. ??
?
?Karl Schmeer
?
|
--- On Wed, 1/13/10, schmuckfenster wrote:
From: schmuckfenster
Subject: [xpantastic] CEM 3374
To: xpantastic@...
Date: Wednesday, January 13, 2010, 3:22 PM
?
Hi everyone
Only was 'lurking' in this group so far. I have fulfilled an old dream and bought an Xpander some months ago and all was fine. Until one voice died. I checked the chips by trial & error and found the one causing it (it makes that voice it is put onto fail the tuning and not sound at all).
By then I did not know yet that the 3374 is so rare...I could not find any and I wrote to many 'vintage repair shops' and scanned ebay, posted in forums etc.
So if anyone has a trusty
source that would give me back my 6th voice I'd be highly grateful. For the moment I switched the voice off of course.
To be honest, I also ask myself what actually does 'fail' in such a chip? Is it a physical 'burning' through or just a contact that is lost? No way of trying to repair the chip itself?
Many thanks for any help.
Kind Regards
|
Hi,
I have a M12 and believe it or not, there are times I wish I had an Xpander. It would be nice sometimes to have the CV ins and the output per voice. (Currently my M12 does not have the individual outputs.)??
?
You would think that 12 voices layered up in mono mode would be a thicker solo sound, but it doesn't work that way. With 12 analog voices droning,?phase differences start
canceling out some of the voices. So at the end of the day 6 voices layered up is just?as
thick as 12 IMO.
The M12 advantage shows itself when you are multi channel sequencing. I have had a blast
feeding?the M12, a midi sequence from a typical drum machine/sequencer and then replace all the sounds one by one. I usually keep the digital cymbals but the rest of it, can be just stunning to hear.
?
> I also understand the m12 can double voices too...
Oh Yeah, but your Xpander also does this.
?
b.t.w.
I have played the A6 Andromada and DSI stuff. IMO The keyboards on these synths are just as clunky as the M12.??
?
??
Karl Schmeer
??
|
--- On Wed, 1/13/10, mattvrazo wrote:
From: mattvrazo
Subject: [xpantastic] Xpander vs. M12
To: xpantastic@...
Date: Wednesday, January 13, 2010, 10:37 AM
?
Ok, this is not really a "vs." but more of a "worth the upgrade?" question. I am thrilled with my xpander, but have the opportunity to buy an M12 locally. Obviously, double the voices of the xpander, but also (in my mind) double the potential for voice failure/problems. However, I am still tempted as the price is less than what they are currently going for.
Although it would be nice to have more voices for the sake of having more voices, I am wondering if others found the M12 to be more gratifying in any other way. I currently treat the xpander more as a single polysynth rather than a multitimbral/ monosynths, so I would imagine having the extra voices would be useful. I also understand the m12 can double voices too...
Any advocates for the upgrade or would this be a gratuitous purchase?
|
Re: Matrix-12 resurrecting...
Hey there,
>--- On Wed, 1/13/10, mursupeppe wrote:
>From: mursupeppe
>Subject: [xpantastic] Matrix-12 resurrecting...
>To: xpantastic@...
>Date: Wednesday, January 13, 2010, 12:46 AM
>I've experienced a miracle. A good friend of mine, Mr. Mikko K?ykk?, has managed to >literally resurrect a Matrix-12 that was sold to me a while ago. Every oscillator and filter
>now works and the synth is actually very playable - and a very big THANK YOU comes >out to this group, to all its members, the nice fellow who sold a CEM 3374 to me - and >especially The Oberheim Aficionado, Karl. Without his help I would have been, well, >**cked.
>For a while I thought this day would never come, but "dees dings do 'appen".
Well that's fantastic. It's always great to hear that. It always amazes me,?that not only is the M12/expander a technical marvel, but also a?beautifully sounding,?musical instrument.?
?
?
>There is a minor issue left, though. After switching the Matrix on, it's actually very >unstable and becomes tunable only after 15-20 minutes. Before that, some of the >RES/VCF tunings will fail randomly (OSCs and everything else are tuning every time >flawlessly, without hitch), until its warmed. Is there anything I could do to heal this >symptom or do I just have to take it as such?
This is typical of most analog synths. However, did you recap the entire voice board/s ?
some of the filter coupling caps could?be about to fail. If all have been replaced,
there could still be a cold solder joint somewhere.?I would reflow the solder around all the filter circuits.???
?
>The pitchbend and modwheel are also producing quite impressive wobbling and are >somewhat unusable, so we'll have to dig into those as well, but they're priority 104, so to >speak ;-)
?
Sounds like the set screw that holds the paddle to the potentiometer is slipping. You have to take the whole pitch bend assembly apart, to get to the shaft of the pitch bend potentiometer. If you look closely you will see whare the set screw on the paddle has worn a grove into the potentiometer shaft. If you file this flat with
a small file you can now put the paddle back on and tighten the set screw.? The paddle? should stay in place now. If you need more detail on this please ask.
?
btw I have had to do this with a few matrix 6-? keyboards as well.
?
?
>Also, what type of screws and screwplates are being used in the side panels, the black >ones? I've tried to find suitable parts, but unfortunately all my sources seem to have run >dry. And if one of you has spare keys, I could use a few, d, g and e namely. :-D
Don't know on the screws but I know a guy with a?trashed?matrix 6 keyboard ( same keyboard as M12)?I will see if he wants to sell em. They are?NOT?BRAND NEW,
but will work.?
>Incredible. For a short while I thought I'd scrap the whole thing and sell its parts. Now it's >returning back to work after a total internal makeover. Yes, miracles do happen.
?
Man, I love to hear that.?
?
: - )))))))))))))))))))))))))))))))))
?
Karl Schmeer
?
? |
|
>>No way of trying to repair the chip itself?
Absolutely not.
Look on Ebay for a vendor named ChipsForBrains- he was selling CEM's last year
toggle quoted message
Show quoted text
On Wed, Jan 13, 2010 at 1:22 PM, schmuckfenster <schmuckfenster@...> wrote:
?
Hi everyone
Only was 'lurking' in this group so far. I have fulfilled an old dream and bought an Xpander some months ago and all was fine. Until one voice died. I checked the chips by trial & error and found the one causing it (it makes that voice it is put onto fail the tuning and not sound at all).
By then I did not know yet that the 3374 is so rare...I could not find any and I wrote to many 'vintage repair shops' and scanned ebay, posted in forums etc.
So if anyone has a trusty source that would give me back my 6th voice I'd be highly grateful. For the moment I switched the voice off of course.
To be honest, I also ask myself what actually does 'fail' in such a chip? Is it a physical 'burning' through or just a contact that is lost? No way of trying to repair the chip itself?
Many thanks for any help.
Kind Regards
|
Hi everyone
Only was 'lurking' in this group so far. I have fulfilled an old dream and bought an Xpander some months ago and all was fine. Until one voice died. I checked the chips by trial & error and found the one causing it (it makes that voice it is put onto fail the tuning and not sound at all).
By then I did not know yet that the 3374 is so rare...I could not find any and I wrote to many 'vintage repair shops' and scanned ebay, posted in forums etc.
So if anyone has a trusty source that would give me back my 6th voice I'd be highly grateful. For the moment I switched the voice off of course.
To be honest, I also ask myself what actually does 'fail' in such a chip? Is it a physical 'burning' through or just a contact that is lost? No way of trying to repair the chip itself?
Many thanks for any help.
Kind Regards
|
mattvrazo wrote: Ok, this is not really a "vs." but more of a "worth the upgrade?" question. I am thrilled with my xpander, but have the opportunity to buy an M12 locally. Obviously, double the voices of the xpander, but also (in my mind) double the potential for voice failure/problems. However, I am still tempted as the price is less than what they are currently going for.
Although it would be nice to have more voices for the sake of having more voices, I am wondering if others found the M12 to be more gratifying in any other way. I currently treat the xpander more as a single polysynth rather than a multitimbral/monosynths, so I would imagine having the extra voices would be useful. I also understand the m12 can double voices too... Any advocates for the upgrade or would this be a gratuitous purchase? Hi, For me the question isn't "How many more voices does it have than the Xpander", it's "When will I need more than 6 voices". In that case, the Xpander is fine, as I use another synth for basses, a Crumar Toccata for fine organ sounds, and a HardSID (on a card in an old Windows 98 box!) for wierd leads. This leaves me usually: *3 voices for sustained leads (eg, all 3 voices playing different notes at once and fading out) *1 for lead *1 for bass *1 for background pad. And if it's good enough for the Human League and Vince Clarke, it's good enough! Jeremy.
|
I have had both. While I don't like the keyboard feel of the M12, I do like?the m12- and having a keyboard, any keyboard-?slightly better than the xpander. the xpander has an advantage in the cv department- it can be triggered by cv ins, where the m12 can't. But you can build better multis with the the M12. I haven't really used all 12 voices. IIRC the M12 has a page that keeps better track of what modulates what than the xpander. That's about it. If I couldn't have an M12, I woul be super happy with the xpander so the differences are , to me, slight.
On Wed, Jan 13, 2010 at 11:37 AM, mattvrazo <vrazomatt@...> wrote:
?
Ok, this is not really a "vs." but more of a "worth the upgrade?" question. I am thrilled with my xpander, but have the opportunity to buy an M12 locally. Obviously, double the voices of the xpander, but also (in my mind) double the potential for voice failure/problems. However, I am still tempted as the price is less than what they are currently going for.
Although it would be nice to have more voices for the sake of having more voices, I am wondering if others found the M12 to be more gratifying in any other way. I currently treat the xpander more as a single polysynth rather than a multitimbral/monosynths, so I would imagine having the extra voices would be useful. I also understand the m12 can double voices too...
Any advocates for the upgrade or would this be a gratuitous purchase?
|
Ok, this is not really a "vs." but more of a "worth the upgrade?" question. I am thrilled with my xpander, but have the opportunity to buy an M12 locally. Obviously, double the voices of the xpander, but also (in my mind) double the potential for voice failure/problems. However, I am still tempted as the price is less than what they are currently going for.
Although it would be nice to have more voices for the sake of having more voices, I am wondering if others found the M12 to be more gratifying in any other way. I currently treat the xpander more as a single polysynth rather than a multitimbral/monosynths, so I would imagine having the extra voices would be useful. I also understand the m12 can double voices too...
Any advocates for the upgrade or would this be a gratuitous purchase?
|
Matrix-12 resurrecting...
Hi,
I've experienced a miracle. A good friend of mine, Mr. Mikko K?ykk?, has managed to literally resurrect a Matrix-12 that was sold to me a while ago. Every oscillator and filter now works and the synth is actually very playable - and a very big THANK YOU comes out to this group, to all its members, the nice fellow who sold a CEM 3374 to me - and especially The Oberheim Aficionado, Karl. Without his help I would have been, well, **cked.
For a while I thought this day would never come, but "dees dings do 'appen".
There is a minor issue left, though. After switching the Matrix on, it's actually very unstable and becomes tunable only after 15-20 minutes. Before that, some of the RES/VCF tunings will fail randomly (OSCs and everything else are tuning every time flawlessly, without hitch), until its warmed. Is there anything I could do to heal this symptom or do I just have to take it as such? The pitchbend and modwheel are also producing quite impressive wobbling and are somewhat unusable, so we'll have to dig into those as well, but they're priority 104, so to speak ;-)
Also, what type of screws and screwplates are being used in the side panels, the black ones? I've tried to find suitable parts, but unfortunately all my sources seem to have run dry. And if one of you has spare keys, I could use a few, d, g and e namely. :-D
Incredible. For a short while I thought I'd scrap the whole thing and sell its parts. Now it's returning back to work after a total internal makeover. Yes, miracles do happen.
|
Search for auctions from a seller named ChipsForBrains.
He has sold a lot of NOS CEM's. I've bought some from him for spares- but haven't tried them actually.
toggle quoted message
Show quoted text
On Sun, Dec 13, 2009 at 6:50 PM, Karl Schmeer <shire03@...> wrote:
?
|
Hi,
Well you are right. It must be the chip.? I have seen them come up on ebay occasionally.
Maybe someone has a spare they can sell you. At least you can turn the voice off for the time being.
Do a gog search, you might find one at a repair shop somewhere.
?
Karl
From: schmuckfenster <schmuckfenster@...>
Subject: [xpantastic] Re: CEM 3374
To: xpantastic@...
Date: Sunday, December 13, 2009, 4:21 AM
?
Hi Karl
Thanks for your answer. Yes I am pretty sure. Voice No. 4 died completely (no sound at all, the tunig fails immediately) . I started swapping the chips and that is the one that does not work (if I swap it with another voice, i.e. 5, then that one no longer works but 4 is fine again etc).
Haven't heard that these chips fail often but here it seems the case. The unit is in very good condition otherwise, I bought it some months ago from US.
Lovely lovely machine I do hope I will be able to use all 6 voices again.
Regards
flo
--- In , Karl Schmeer wrote:
>
> Hi,
> Extreamly rare, are you sure that it is the problem. Have you tried swapping it with another
> voice?
>
??
> Karl
> ??
>
> --- On Sat, 12/12/09, schmuckfenster wrote:
>
>
> From: schmuckfenster
> Subject: [xpantastic] CEM 3374
> To:
> Date: Saturday, December 12, 2009, 1:43 PM
>
>
> ??
>
>
>
> Hi
>
> Unfortunately one of these chips died on my Xpander. If somebody has one for sale please let me know.
>
> Many thanks.
>
|
|
Re: Voice 2 fails to tune
Hi,
?
The voice 2 coupling capacitor is most likely?failing.? This would be part # C249 for voice two.
It is a 2.2 uF 50VDC electrolytic capacitor. I would replace this first. As it often causes this problem.
?
Karl
|
--- On Sun, 12/13/09, swisstony123456789 wrote:
From: swisstony123456789
Subject: [xpantastic] Voice 2 fails to tune
To: xpantastic@...
Date: Sunday, December 13, 2009, 12:12 PM
?
Hi I recently used the detune button option on the Xpander all voices where working fine until I did this, now everytime I try to tune it I get a fail on voice 2. It's not completely dead but it's not intune or sounding quite right. Does anyone have any ideas or has anyone else experienced this or is it just a dead voice?? Thanks in advance for any suggestions.
|
Hi,
Well you are right. It must be the chip.? I have seen them come up on ebay occasionally.
Maybe someone has a spare they can sell you. At least you can turn the voice off for the time being.
Do a gog search, you might find one at a repair shop somewhere.
?
Karl
?
|
--- On Sun, 12/13/09, schmuckfenster <schmuckfenster@...> wrote:
From: schmuckfenster
Subject: [xpantastic] Re: CEM 3374
To: xpantastic@...
Date: Sunday, December 13, 2009, 4:21 AM
?
Hi Karl
Thanks for your answer. Yes I am pretty sure. Voice No. 4 died completely (no sound at all, the tunig fails immediately) . I started swapping the chips and that is the one that does not work (if I swap it with another voice, i.e. 5, then that one no longer works but 4 is fine again etc).
Haven't heard that these chips fail often but here it seems the case. The unit is in very good condition otherwise, I bought it some months ago from US.
Lovely lovely machine I do hope I will be able to use all 6 voices again.
Regards
flo
--- In , Karl Schmeer wrote:
>
> Hi,
> Extreamly rare, are you sure that it is the problem. Have you tried swapping it with another
> voice?
>
??
> Karl
> ??
>
> --- On Sat, 12/12/09, schmuckfenster wrote:
>
>
> From: schmuckfenster
> Subject: [xpantastic] CEM 3374
> To:
> Date: Saturday, December 12, 2009, 1:43 PM
>
>
> ??
>
>
>
> Hi
>
> Unfortunately one of these chips died on my Xpander. If somebody has one for sale please let me know.
>
> Many thanks.
>
|
Hi I recently used the detune button option on the Xpander all voices where working fine until I did this, now everytime I try to tune it I get a fail on voice 2. It's not completely dead but it's not intune or sounding quite right. Does anyone have any ideas or has anyone else experienced this or is it just a dead voice?? Thanks in advance for any suggestions.
|
Hi Karl
Thanks for your answer. Yes I am pretty sure. Voice No. 4 died completely (no sound at all, the tunig fails immediately). I started swapping the chips and that is the one that does not work (if I swap it with another voice, i.e. 5, then that one no longer works but 4 is fine again etc).
Haven't heard that these chips fail often but here it seems the case. The unit is in very good condition otherwise, I bought it some months ago from US.
Lovely lovely machine I do hope I will be able to use all 6 voices again.
Regards
flo
toggle quoted message
Show quoted text
--- In xpantastic@..., Karl Schmeer <shire03@...> wrote:
Hi,
Extreamly rare, are you sure that it is the problem. Have you tried swapping it with another
voice?
??
Karl
??
--- On Sat, 12/12/09, schmuckfenster <schmuckfenster@...> wrote:
From: schmuckfenster <schmuckfenster@...>
Subject: [xpantastic] CEM 3374
To: xpantastic@...
Date: Saturday, December 12, 2009, 1:43 PM
??
Hi
Unfortunately one of these chips died on my Xpander. If somebody has one for sale please let me know.
Many thanks.
|
Hi,
Extreamly rare, are you sure that it is the problem. Have you tried swapping it with another
voice?
?
Karl
?
|
--- On Sat, 12/12/09, schmuckfenster wrote:
From: schmuckfenster
Subject: [xpantastic] CEM 3374
To: xpantastic@...
Date: Saturday, December 12, 2009, 1:43 PM
?
Hi
Unfortunately one of these chips died on my Xpander. If somebody has one for sale please let me know.
Many thanks.
|
Hi
Unfortunately one of these chips died on my Xpander. If somebody has one for sale please let me know.
Many thanks.
|
Re: Total Filter Replacement: good idea?
Thanks Karl, great advice! I definitely need to try swapping chips first-it seems to be a day to day thing where one day the filters really sound out of wack, and then other days (like today) they are pretty much all in tune.
But it's also good to know about those caps...
toggle quoted message
Show quoted text
--- In xpantastic@..., Karl Schmeer <shire03@...> wrote:
Hi Matt,
??
Well, if the filters on two voices are opening up too much that would point to replacing the??filter over the vco chips. (A VCF with a different frequency response??would change your filter FM sounds also)
??
All the IC's are in sockets, so It's easy to change out the VCF chip. Also you could
trade VCF chips from another voice.
??
If changing out VCF chips does not work, You could try the VCO's next.
??
Next, ??I would look at the coupling capacitors in the voices that are causing problems.
The FM signal feeds to the VCF through a??2.2uF 50 Vcap??. Also??the voice output signal has one. During a tuning sequence these could be causing??"not correct" calibration constants
to be stored in memory, thereby causing your filter chips to be off.
After doing any of these changes, You should run all the tuning routines.??Then try it out.????
??
Statically the capacitors in the voice signal have been the most common??fail.??They tend to fail over time, and??are probably at least??15 YO.?? They are very inexpensive, it's just takes time.
??
These are the most likely capacitors to change:
The capacitor value is 2.2 uF 50 V The voltage rating must be 50V or it will limit the signal??
that goes through it.?? I would not want to use a larger voltage rating either, as it may damage components downstream from it.??
note:?? x = voice number
??
Cx02?????? FM in
Cx49?????? VCA out?? - Main Voice out to final mix.?? -?? Most likely Bet IMO
Cx48???? VCF out
Cx47???? VCA in????
??
??
As far as the Matched sets go. I have always been curious as to what parameters they are matched for???In theory the tuning routines in the Xpander/M12 should take care of any differences between any set of chips.
??
Good Luck
??
Karl Schmeer
??
????
??
??
??
??
??????
??
??
??
??
--- On Fri, 11/13/09, mattvrazo <vrazomatt@...> wrote:
From: mattvrazo <vrazomatt@...>
Subject: [xpantastic] Total Filter Replacement: good idea?
To: xpantastic@...
Date: Friday, November 13, 2009, 4:09 PM
??
I have posted in the past about my filter FM not being consistent across all voices-2 voices in particular are always different. Even with FM off, there are still fairly noticeable differences in the filter of those two voices compared to everything else.
So I am assuming that either the filter chips for those two voices are going south OR the VCO chips are. I have spares for both, but before I start pulling things out, I am wondering which chip is the more likely one to be an issue?
Filter FM is linked to osc 1, so if there are issues with that VCO chip, it will sound off (even if the VCOs themselves are perfectly in tune). But given that the filter sounds more bright or "different" on those same voices, even with FM off, I am thinking it is more likely a filter chip issue... The FM doesn't bother me so much, but having slightly different filter "openness" on 2 voices does.
What should my plan of attack be (i.e. start swapping chips, or throw in replacements) ?
Also, will I notice much difference compared to the remaining voices if I replace one or 2 filter chips? i.e. is it better to replace all 6 for a consistent sound, or does it make any difference? 3372s are fairly cheap now, so I wonder if it is better to buy a "matched" set?
|
