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Re: Why no Xpander mod. matrix implementation?

 

________________________________
From: Tony Cappellini <cappy2112@...>
To: xpantastic@...
Sent: Sat, August 6, 2011 10:10:51 AM
Subject: Re: [xpantastic] Re: Why no Xpander mod. matrix implementation?

?
AFAIK?it has never been tried before. I would want to take a long serious
look?
The Matrix 12 ROMS will try to find the 2nd voice board which the Xpander
doesn't have.
This *may* cause an error condition which keeps the CPU from completing
its initialization routine.

Good Point Tony.

I was thinking,?you could just turn off the voices?7 - 12 in the master page.
Your right,?it could never be that easy.

Karl
Re: Why no Xpander mod. matrix implementation?

 



>>AFAIK?it has never been tried before. I would want to take a long serious look?

The Matrix 12 ROMS will try to find the 2nd voice board which the Xpander doesn't have.
This *may* cause an error condition which keeps the CPU from completing
its initialization routine.
Re: Why no Xpander mod. matrix implementation?

 

Hi Matt,


The mod matrix page is accessed through the "Misc" page, correct? So the
implementation is based on hardware that already exists on the Xpander i.e. you
wouldn't be giving up any other buttons.
Yep

So the big question is: would the mod matrix become available if you used M12
roms in the Xpander? Has anyone tried? I too could easily give up the cv/gate
ins...
AFAIK?it has never been tried before. I would want to take a long serious look
at the schematics and hardware
for each synth before I would even try it.

Best

Karl?

________________________________
From: vrazomatt <vrazomatt@...>
To: xpantastic@...
Sent: Fri, August 5, 2011 10:17:15 AM
Subject: [xpantastic] Re: Why no Xpander mod. matrix implementation?

--- In xpantastic@..., Karl Schmeer <shire03@...> wrote:

Hi Matt,

I should have been more clear. I am assuming the digital boards of both the
Xpander and the M12 are the same.
I really don't know if they are, but if so, it would seem you could take a set
of coppied ROMs from an M12 and put them into an Xpander.?? Giving the Xpander
the Modulation list page. However since the M12 roms never supported?
the 6 CV/gate ??inputs they would not exsist to the firmware.
On th M12, the modulation??page gives you a list of all 20 modulation routings.

You can change the amount or the destination. I??find it most useful to delete
unused ones when I need more for some reason.??
But there is a bug. If you access the modulation page, for some reason it turns


off??any quantization??you may have set up.

Best Regards

Karl


________________________________
From: vrazomatt <vrazomatt@...>
To: xpantastic@...
Sent: Thu, August 4, 2011 10:56:27 AM
Subject: [xpantastic] Re: Why no Xpander mod. matrix implementation?

Karl,
I presume you are talking about the 6 cv/gate inputs (not the CV pedal inputs,

which I assume the M12 has as well)? If so, there is no direct
CV-as-mod-source


ability now, so I'm not sure why this would have to be addressed in the
mod-matrix?

From my understanding, the mod matrix is just a compendium of all mod
routings,


addressed though the already existing "misc" page, so no additional coding
would


be necessary.
Anyways, I guess this is all just academic unless someone feels like writing
something up!:)

Am 04.08.2011 08:59, schrieb Karl Schmeer:

So if even if someone copied
the ROMs from an M12 and was successful in getting it to work in an
Xpander. you would still lose the
code to control the CV inputs.


Best Regards

Karl
Re: Intro and questions

 

I do have 2 Xpander DACs left in stock and the 3372s. I also have a few 3340s and 3360s if you need them Rob. I am out of 3374s and beware that the ones on ebay from that Chinese seller are fakes (surface mount 8-pin chip not aat all related to CEMs). Doug, synthparts.com

--- In xpantastic@..., blchrr@... wrote:

Hi there, just the one DAC in the Xpander- i dont think you have to have one
for spares, but they seem to be a hard to find part, so if you want to get
one as a precaution then it might be a good idea, i grabbed a couple when a
saw a few nos going fairly cheap a few years back.
Yes- the vfd screens are great on the replacement display board, my unit was
the test machine for that, i have the first unit installed in mine and its
great, not had any problems at all, my old screens were dim and failing
otherwise i wouldnt have bothered either- but they are great and i think its
good value for money, steve (@ benden sound) has been repairing and
modifying my gear (when he has the spare time- not his main line of work)
for about 5 years or so- hes a really good guy.
Regarding the cems, i cant see any more being made unfortunately, its
definately a good idea to have a few for spares, especially as they are
getting harder to find. I could do with a few 3340's and 3360's myself, just
a couple of each as spares for my JP6 and 101.

Hey, Thanks for that, Ive spoken to a couple of those people already funnily enough (benden and synthparts. You think the DAC is worth having a spare one of too then? Is there one of those inside or 6 do you know?
The guy who teched mine didnt think Id have a problem with the screens, think its been in storage for a long while- they are very bright and have no fading anywhere. I might grab one of the benden ones on the next run just in case, its great that he did that. :) Be nice if someone mass produced another run of CEMs just to future proof us but I cant see that happening.

--- In xpantastic@..., blchrr@ wrote:

Nice demos there Andy.
The CEM chips labels are 3374 for the dual vco and 3372 for the vcf chip, i
think you will be able to find the 3372 filter chips quite easily on ebay,
but the dual vco chip is harder to find- i think they do pop up on ebay from
time to time, but i think thats going to be your best bet for those, also
check some of the vintage parts suppliers:
www.synthparts.com

I just checked and synthparts have them in stock, they also have the HS3140C
dac in stock which is another hard to find part..

My tech buddy built some replacement display boards for the xpander, check
it out:


Hope that helps!


Hello, finally got hold of an xpander last week, absolutely love it. Some of my first sounds out of it here:

Im not really a vintage chap but I make exception for the XP, always amazes me that no-one has ever really topped it in the 25 years it has been out. I guess the andromeda came close but since its not a desktop synth and looks like a mid 90's car stereo Im ruling it out.

Anyway, Ive a few questions:

CEM's- anyone know of anywhere with a few spare VCO and filter chips. Is that all I should be stocking up on or is there anything else prone to faliure?

OS- Im not on the most recent OS (think Im on 1.0 and 1.2), everything is running perfect so Im tempted to leave as is- is there anything Im missing out on by not upgrading? Was it just a bug fix upgrade?

Manual: I have a PDF I can print though I was wondering if anywhere stocks printed & bound manuals?

Cheers,

Andy/tIB/sonofprent
Re: Why no Xpander mod. matrix implementation?

 

Karl,

The mod matrix page is accessed through the "Misc" page, correct? So the implementation is based on hardware that already exists on the Xpander i.e. you wouldn't be giving up any other buttons.

So the big question is: would the mod matrix become available if you used M12 roms in the Xpander? Has anyone tried? I too could easily give up the cv/gate ins...

--- In xpantastic@..., Karl Schmeer <shire03@...> wrote:

Hi Matt,

I should have been more clear. I am assuming the digital boards of both the
Xpander and the M12 are the same.
I really don't know if they are, but if so, it would seem you could take a set
of coppied ROMs from an M12 and put them into an Xpander.?? Giving the Xpander
the Modulation list page. However since the M12 roms never supported

the 6 CV/gate ??inputs they would not exsist to the firmware.

On th M12, the modulation??page gives you a list of all 20 modulation routings.
You can change the amount or the destination. I??find it most useful to delete
unused ones when I need more for some reason.??

But there is a bug. If you access the modulation page, for some reason it turns
off??any quantization??you may have set up.

Best Regards

Karl


________________________________
From: vrazomatt <vrazomatt@...>
To: xpantastic@...
Sent: Thu, August 4, 2011 10:56:27 AM
Subject: [xpantastic] Re: Why no Xpander mod. matrix implementation?

Karl,
I presume you are talking about the 6 cv/gate inputs (not the CV pedal inputs,
which I assume the M12 has as well)? If so, there is no direct CV-as-mod-source
ability now, so I'm not sure why this would have to be addressed in the
mod-matrix?

From my understanding, the mod matrix is just a compendium of all mod routings,
addressed though the already existing "misc" page, so no additional coding would

be necessary.
Anyways, I guess this is all just academic unless someone feels like writing
something up!:)

Am 04.08.2011 08:59, schrieb Karl Schmeer:

So if even if someone copied
the ROMs from an M12 and was successful in getting it to work in an
Xpander. you would still lose the
code to control the CV inputs.


Best Regards

Karl
Re: Why no Xpander mod. matrix implementation?

 

>>Well, you could do alot if the software was rewritten. But to do that you would need development tools from that era,

>>like a 6809 Emulator/debug system and so forth.

I'm sure these are still available.

I know of people doing 6809 development, but it's higher-level languages.

>>To me it would be easier to adapt a modern proccessor to the Xpanders voice
>>board and display I/O etc.

Hitachi makes a 3 (or4??) MHZ pin compatible replacement for the 6809, that is used
in the computers by the above mentioned people. I think that is the E version of the 6809, which
isn't pin compatible with the 6809 in the Xpander (but is compatible on the instruction level).

A pic, or Arduino could do the job and without the zipper noise from heavy modulation, if it had enough I/O lines ;-)

Can you imagine o w many mod routings could be done by a modern processor?
100s, or 1000's per patch!!
?

>>Still not an easy job though :-)

I'm sure you can get beta code out to us by Monday though ;-)
Re: Why no Xpander mod. matrix implementation?

 

¿ªÔÆÌåÓý


You mean,- w/ a Matrix-12, if you?ve set up any quantized modulation or quantized portamento, these settings would be canceled by accessing the modulation page ?
Really ?
If yes and I?d know this as a user, I?d never access this page, which renders it useless.

Am 05.08.2011 01:21, schrieb Karl Schmeer:

?



But there is a bug. If you access the modulation page, for some reason it turns
off?any quantization?you may have set up.

Best Regards

Karl
Re: Why no Xpander mod. matrix implementation?

 

¿ªÔÆÌåÓý

I think, it is a well designed, relatively intuitive to use and reliable machine as it is.
I never needed the mod-matrix display of a Matrix-12 in my Xpander since I buyed it in the late 80th because I was able to remember the modulations during programming,- and there are the ears too.
These machines aren?t made to do everything w/ the eyes and if someone wants that, there are the computers and editor applications.

I?ve found the detune page much more important for quick work w/ the Matrix 12,- and I would never give up the CV inputs for some visualization as long there?s other CV gear existing in the arsenal.

PeWe

Am 05.08.2011 01:02, schrieb Karl Schmeer:

?


Still not an easy job though :-)

__________________
From: Tony Cappellini <cappy2112@...>
To: xpantastic@...
Sent: Thu, August 4, 2011 9:08:36 AM
Subject: Re: [xpantastic] Why no Xpander mod. matrix implementation?

?

I would easily give up the CV inputs for the Matrix Mod display?
Re: Why no Xpander mod. matrix implementation?

 

Hi Matt,

I should have been more clear. I am assuming the digital boards of both the
Xpander and the M12 are the same.
I really don't know if they are, but if so, it would seem you could take a set
of coppied ROMs from an M12 and put them into an Xpander.? Giving the Xpander
the Modulation list page. However since the M12 roms never supported

the 6 CV/gate ?inputs they would not exsist to the firmware.

On th M12, the modulation?page gives you a list of all 20 modulation routings.
You can change the amount or the destination. I?find it most useful to delete
unused ones when I need more for some reason.?

But there is a bug. If you access the modulation page, for some reason it turns
off?any quantization?you may have set up.

Best Regards

Karl


________________________________
From: vrazomatt <vrazomatt@...>
To: xpantastic@...
Sent: Thu, August 4, 2011 10:56:27 AM
Subject: [xpantastic] Re: Why no Xpander mod. matrix implementation?

Karl,
I presume you are talking about the 6 cv/gate inputs (not the CV pedal inputs,
which I assume the M12 has as well)? If so, there is no direct CV-as-mod-source
ability now, so I'm not sure why this would have to be addressed in the
mod-matrix?

From my understanding, the mod matrix is just a compendium of all mod routings,
addressed though the already existing "misc" page, so no additional coding would

be necessary.
Anyways, I guess this is all just academic unless someone feels like writing
something up!:)

Am 04.08.2011 08:59, schrieb Karl Schmeer:

So if even if someone copied
the ROMs from an M12 and was successful in getting it to work in an
Xpander. you would still lose the
code to control the CV inputs.


Best Regards

Karl
Re: Why no Xpander mod. matrix implementation?

 

Hi Tony,

Well, you could do alot if the software was rewritten. But to do that you would
need development tools from that era,
like a 6809 Emulator/debug system and so forth.
To me it would be easier to adapt a modern proccessor to the Xpanders voice
board and display I/O etc.
It blows my mind, how today you could put that entire digital board on a
thumbnail.
Still not an easy job though :-)

Best Regards

Karl
________________________________
From: Tony Cappellini <cappy2112@...>
To: xpantastic@...
Sent: Thu, August 4, 2011 9:08:36 AM
Subject: Re: [xpantastic] Why no Xpander mod. matrix implementation?

?


and?was successful in getting?it to work in an Xpander.?you would still lose the


code to control the?CV inputs.
Surely, this could be an option given to the user.
A certain key combination at power on would decide if the user wants CV inputs
or Matrix Mod display. Additionally,
a dedicated button press would be needed to enable the Matrix Mod display, but
this is easily done. There are many mod sources I don't use so I would gladly
sacrifice on of those buttons.

I would easily give up the CV inputs for the Matrix Mod display
Re: Intro and questions

 

'Great??Sounds BTW.?? You didn't waste anytime gettin deep into the programming.'

Heh, thanks Karl- I use a modular setup too so the xpander feels like home already. Incredible interace on this thing, its probably the only thing Ive ever felt more at home with than a monomachine. Speaking of which- check my new school meets old school matrix 12:

!!!

The PSU hasnt had the caps done though the my tech guy said not to worry too much since they dont take anything with them when they go (from his experience). Ill have to check if the battery has been done, didnt ask that.

Thanks for the tips. :)

A

--- In xpantastic@..., Karl Schmeer <shire03@...> wrote:

Hello Andy,

Great??Sounds BTW.?? You didn't waste anytime gettin deep into the programming.

You might want to get??the??backup battery for the memory replaced. It is still
available,

but is a lithium type, and these are getting harder to ship around by air.
Although my original is still doing fine after 30 + years.??

The largest fail by far are the coupling caps??on the voice board. There are
several of these??for
each voice. However they are inexpensive and readily available??from most
electronic supply houses.

Best Regards

Karl




________________________________
From: sonofprent <sonofprent@...>
To: xpantastic@...
Sent: Thu, August 4, 2011 4:25:56 AM
Subject: [xpantastic] Intro and questions

??
Hello, finally got hold of an xpander last week, absolutely love it. Some of my
first sounds out of it here:

Im not really a vintage chap but I make exception for the XP, always amazes me
that no-one has ever really topped it in the 25 years it has been out. I guess
the andromeda came close but since its not a desktop synth and looks like a mid
90's car stereo Im ruling it out.

Anyway, Ive a few questions:

CEM's- anyone know of anywhere with a few spare VCO and filter chips. Is that
all I should be stocking up on or is there anything else prone to faliure?

OS- Im not on the most recent OS (think Im on 1.0 and 1.2), everything is
running perfect so Im tempted to leave as is- is there anything Im missing out
on by not upgrading? Was it just a bug fix upgrade?

Manual: I have a PDF I can print though I was wondering if anywhere stocks
printed & bound manuals?

Cheers,

Andy/tIB/sonofprent
Re: Intro and questions

 

Might leave off the DAC for now, though since there is only one in it I may be better off just going for it...

cheers for the screen tip, mine is showing no signs of age atm but I may well grab a spare when he does the next batch. In a roundabout way your tech guy pushed me over the edge for buying an Xpander- it was always the potential for screen failure that put me off in the past, once I found out they were avaliable again I was straight in!

So steve does mods as well then... maybe Ill hit him up with something- Ive an old akai wind synth (think its CEM3394 based) that I wanted to mod for CV inputs- theres a micropro involved though so it may be over my head. Maybe Ill give him a shout sometime.

Cheers,

A

--- In xpantastic@..., blchrr@... wrote:

Hi there, just the one DAC in the Xpander- i dont think you have to have one
for spares, but they seem to be a hard to find part, so if you want to get
one as a precaution then it might be a good idea, i grabbed a couple when a
saw a few nos going fairly cheap a few years back.
Yes- the vfd screens are great on the replacement display board, my unit was
the test machine for that, i have the first unit installed in mine and its
great, not had any problems at all, my old screens were dim and failing
otherwise i wouldnt have bothered either- but they are great and i think its
good value for money, steve (@ benden sound) has been repairing and
modifying my gear (when he has the spare time- not his main line of work)
for about 5 years or so- hes a really good guy.
Regarding the cems, i cant see any more being made unfortunately, its
definately a good idea to have a few for spares, especially as they are
getting harder to find. I could do with a few 3340's and 3360's myself, just
a couple of each as spares for my JP6 and 101.

Hey, Thanks for that, Ive spoken to a couple of those people already funnily enough (benden and synthparts. You think the DAC is worth having a spare one of too then? Is there one of those inside or 6 do you know?
The guy who teched mine didnt think Id have a problem with the screens, think its been in storage for a long while- they are very bright and have no fading anywhere. I might grab one of the benden ones on the next run just in case, its great that he did that. :) Be nice if someone mass produced another run of CEMs just to future proof us but I cant see that happening.

--- In xpantastic@..., blchrr@ wrote:

Nice demos there Andy.
The CEM chips labels are 3374 for the dual vco and 3372 for the vcf chip, i
think you will be able to find the 3372 filter chips quite easily on ebay,
but the dual vco chip is harder to find- i think they do pop up on ebay from
time to time, but i think thats going to be your best bet for those, also
check some of the vintage parts suppliers:
www.synthparts.com

I just checked and synthparts have them in stock, they also have the HS3140C
dac in stock which is another hard to find part..

My tech buddy built some replacement display boards for the xpander, check
it out:


Hope that helps!


Hello, finally got hold of an xpander last week, absolutely love it. Some of my first sounds out of it here:

Im not really a vintage chap but I make exception for the XP, always amazes me that no-one has ever really topped it in the 25 years it has been out. I guess the andromeda came close but since its not a desktop synth and looks like a mid 90's car stereo Im ruling it out.

Anyway, Ive a few questions:

CEM's- anyone know of anywhere with a few spare VCO and filter chips. Is that all I should be stocking up on or is there anything else prone to faliure?

OS- Im not on the most recent OS (think Im on 1.0 and 1.2), everything is running perfect so Im tempted to leave as is- is there anything Im missing out on by not upgrading? Was it just a bug fix upgrade?

Manual: I have a PDF I can print though I was wondering if anywhere stocks printed & bound manuals?

Cheers,

Andy/tIB/sonofprent
Re: Intro and questions

 

Hello Andy,

Great?Sounds BTW.? You didn't waste anytime gettin deep into the programming.

You might want to get?the?backup battery for the memory replaced. It is still
available,

but is a lithium type, and these are getting harder to ship around by air.
Although my original is still doing fine after 30 + years.?

The largest fail by far are the coupling caps?on the voice board. There are
several of these?for
each voice. However they are inexpensive and readily available?from most
electronic supply houses.

Best Regards

Karl




________________________________
From: sonofprent <sonofprent@...>
To: xpantastic@...
Sent: Thu, August 4, 2011 4:25:56 AM
Subject: [xpantastic] Intro and questions

?
Hello, finally got hold of an xpander last week, absolutely love it. Some of my
first sounds out of it here:

Im not really a vintage chap but I make exception for the XP, always amazes me
that no-one has ever really topped it in the 25 years it has been out. I guess
the andromeda came close but since its not a desktop synth and looks like a mid
90's car stereo Im ruling it out.

Anyway, Ive a few questions:

CEM's- anyone know of anywhere with a few spare VCO and filter chips. Is that
all I should be stocking up on or is there anything else prone to faliure?

OS- Im not on the most recent OS (think Im on 1.0 and 1.2), everything is
running perfect so Im tempted to leave as is- is there anything Im missing out
on by not upgrading? Was it just a bug fix upgrade?

Manual: I have a PDF I can print though I was wondering if anywhere stocks
printed & bound manuals?

Cheers,

Andy/tIB/sonofprent
Re: Why no Xpander mod. matrix implementation?

 

Right back at ya :-)

Karl


________________________________
From: PeWe <ha-pewe@...>
To: xpantastic@...
Sent: Thu, August 4, 2011 3:05:24 AM
Subject: Re: [xpantastic] Why no Xpander mod. matrix implementation?

?

Hi Karl !

That is !

best

PeWe


Am 04.08.2011 08:59, schrieb Karl Schmeer:
?
So if?even if someone copied
the ROMs from an M12 and?was successful in getting?it to work in an Xpander.?you

would still lose the

code to control the?CV inputs.


Best Regards

Karl
Re: Intro and questions

[email protected]
 

Hi there, just the one DAC in the Xpander- i dont think you have to have one for spares, but they seem to be a hard to find part, so if you want to get one as a precaution then it might be a good idea, i grabbed a couple when a saw a few nos going fairly cheap a few years back.
Yes- the vfd screens are great on the replacement display board, my unit was the test machine for that, i have the first unit installed in mine and its great, not had any problems at all, my old screens were dim and failing otherwise i wouldnt have bothered either- but they are great and i think its good value for money, steve (@ benden sound) has been repairing and modifying my gear (when he has the spare time- not his main line of work) for about 5 years or so- hes a really good guy.
Regarding the cems, i cant see any more being made unfortunately, its definately a good idea to have a few for spares, especially as they are getting harder to find. I could do with a few 3340's and 3360's myself, just a couple of each as spares for my JP6 and 101.

Hey, Thanks for that, Ive spoken to a couple of those people already funnily enough (benden and synthparts. You think the DAC is worth having a spare one of too then? Is there one of those inside or 6 do you know?
The guy who teched mine didnt think Id have a problem with the screens, think its been in storage for a long while- they are very bright and have no fading anywhere. I might grab one of the benden ones on the next run just in case, its great that he did that. :) Be nice if someone mass produced another run of CEMs just to future proof us but I cant see that happening. --- In xpantastic@..., blchrr@... wrote:

Nice demos there Andy.
The CEM chips labels are 3374 for the dual vco and 3372 for the vcf chip, i think you will be able to find the 3372 filter chips quite easily on ebay, but the dual vco chip is harder to find- i think they do pop up on ebay from time to time, but i think thats going to be your best bet for those, also check some of the vintage parts suppliers:
www.synthparts.com

I just checked and synthparts have them in stock, they also have the HS3140C dac in stock which is another hard to find part.. My tech buddy built some replacement display boards for the xpander, check it out:
Hope that helps!
Hello, finally got hold of an xpander last week, absolutely love it. Some of my first sounds out of it here: Im not really a vintage chap but I make exception for the XP, always amazes me that no-one has ever really topped it in the 25 years it has been out. I guess the andromeda came close but since its not a desktop synth and looks like a mid 90's car stereo Im ruling it out. Anyway, Ive a few questions: CEM's- anyone know of anywhere with a few spare VCO and filter chips. Is that all I should be stocking up on or is there anything else prone to faliure? OS- Im not on the most recent OS (think Im on 1.0 and 1.2), everything is running perfect so Im tempted to leave as is- is there anything Im missing out on by not upgrading? Was it just a bug fix upgrade? Manual: I have a PDF I can print though I was wondering if anywhere stocks printed & bound manuals? Cheers, Andy/tIB/sonofprent

Re: Why no Xpander mod. matrix implementation?

 

Karl,

I presume you are talking about the 6 cv/gate inputs (not the CV pedal inputs, which I assume the M12 has as well)? If so, there is no direct CV-as-mod-source ability now, so I'm not sure why this would have to be addressed in the mod-matrix?

From my understanding, the mod matrix is just a compendium of all mod routings, addressed though the already existing "misc" page, so no additional coding would be necessary.

Anyways, I guess this is all just academic unless someone feels like writing something up!:)


Am 04.08.2011 08:59, schrieb Karl Schmeer:

So if even if someone copied
the ROMs from an M12 and was successful in getting it to work in an
Xpander. you would still lose the
code to control the CV inputs.


Best Regards

Karl
Re: Why no Xpander mod. matrix implementation?

 


>>and?was successful in getting?it to work in an Xpander.?you would still lose the
>>code to control the?CV inputs.

?

Surely, this could be an option given to the user.

A certain key combination at power on would decide if the user wants CV inputs or Matrix Mod display. Additionally,
a dedicated button press would be needed to enable the Matrix Mod display, but this is easily done. There are many mod sources I don't use so I would gladly sacrifice on of those buttons.

I would easily give up the CV inputs for the Matrix Mod display?
Re: Why no Xpander mod. matrix implementation?

 



>>and?was successful in getting?it to work in an Xpander.?you would still lose the
>>code to control the?CV inputs.
Re: Intro and questions

 

Hey, Thanks for that, Ive spoken to a couple of those people already funnily enough (benden and synthparts. You think the DAC is worth having a spare one of too then? Is there one of those inside or 6 do you know?
The guy who teched mine didnt think Id have a problem with the screens, think its been in storage for a long while- they are very bright and have no fading anywhere. I might grab one of the benden ones on the next run just in case, its great that he did that. :) Be nice if someone mass produced another run of CEMs just to future proof us but I cant see that happening.

--- In xpantastic@..., blchrr@... wrote:

Nice demos there Andy.
The CEM chips labels are 3374 for the dual vco and 3372 for the vcf chip, i
think you will be able to find the 3372 filter chips quite easily on ebay,
but the dual vco chip is harder to find- i think they do pop up on ebay from
time to time, but i think thats going to be your best bet for those, also
check some of the vintage parts suppliers:
www.synthparts.com

I just checked and synthparts have them in stock, they also have the HS3140C
dac in stock which is another hard to find part..

My tech buddy built some replacement display boards for the xpander, check
it out:


Hope that helps!


Hello, finally got hold of an xpander last week, absolutely love it. Some of my first sounds out of it here:

Im not really a vintage chap but I make exception for the XP, always amazes me that no-one has ever really topped it in the 25 years it has been out. I guess the andromeda came close but since its not a desktop synth and looks like a mid 90's car stereo Im ruling it out.

Anyway, Ive a few questions:

CEM's- anyone know of anywhere with a few spare VCO and filter chips. Is that all I should be stocking up on or is there anything else prone to faliure?

OS- Im not on the most recent OS (think Im on 1.0 and 1.2), everything is running perfect so Im tempted to leave as is- is there anything Im missing out on by not upgrading? Was it just a bug fix upgrade?

Manual: I have a PDF I can print though I was wondering if anywhere stocks printed & bound manuals?

Cheers,

Andy/tIB/sonofprent
Re: Intro and questions

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Nice demos there Andy.
The CEM chips labels are 3374 for the dual vco and 3372 for the vcf chip, i think you will be able to find the 3372 filter chips quite easily on ebay, but the dual vco chip is harder to find- i think they do pop up on ebay from time to time, but i think thats going to be your best bet for those, also check some of the vintage parts suppliers:
www.synthparts.com

I just checked and synthparts have them in stock, they also have the HS3140C dac in stock which is another hard to find part..

My tech buddy built some replacement display boards for the xpander, check it out:


Hope that helps!

Hello, finally got hold of an xpander last week, absolutely love it. Some of my first sounds out of it here: Im not really a vintage chap but I make exception for the XP, always amazes me that no-one has ever really topped it in the 25 years it has been out. I guess the andromeda came close but since its not a desktop synth and looks like a mid 90's car stereo Im ruling it out. Anyway, Ive a few questions: CEM's- anyone know of anywhere with a few spare VCO and filter chips. Is that all I should be stocking up on or is there anything else prone to faliure? OS- Im not on the most recent OS (think Im on 1.0 and 1.2), everything is running perfect so Im tempted to leave as is- is there anything Im missing out on by not upgrading? Was it just a bug fix upgrade? Manual: I have a PDF I can print though I was wondering if anywhere stocks printed & bound manuals? Cheers, Andy/tIB/sonofprent
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