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There?s nothing wrong with it,- use it as a synth ...
Try to create?a wovel sounding selfplaying patch which sings the song "Rolling Home" ...

:-D

I will.
I hope to take a look inside this weekend. During the week is difficult

He fixed my Xpander in no time across the atlantic

Karl- my car is making a noise that also sounds like my Xpander.
Any idea what is wrong ;-)

On Fri, Sep 5, 2008 at 8:23 AM, philipperyckman <caractere@...> wrote:

All of you,

Guys, trust Karl: he's a genius. He fixed my Xpander in no time
across the atlantic !! Do exactly the steps he recommends.
Best regards to all,
Philippe

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Yep,- Karl is a big plus here !

PeWe


philipperyckman schrieb:

All of you,

Guys, trust Karl: he's a genius. He fixed my Xpander in no time
across the atlantic !! Do exactly the steps he recommends.
Best regards to all,
Philippe

Hi Tony,

I did find this link to some xpander pages in PDF:



Karl

Hey Tony,

I was looking in the Xpander Service Manual. I Have a PDF copy, but I
don't remember were I got it. Anyway, It says that When you do the
DAC mono test you should hear none or very seldom beep on the audio.
But thats it, nothing on what to do if you hear lots of beeps
(page 35)
The next page describes a software reset - Hold down clear (at the
end of the MOD row) And turn Power On. The M12 service manual has
none of this.

--- In xpantastic@..., "Tony Cappellini" <cappy2112@...>

wrote:
BTW My Xpander came to life after I pressed Untune, then ran
Autotune. The output level is much higher, and has more presence.

You know, I have done really bizzare mod stuff with mine (every
mod routed to itself etc..) I have sometimes locked it up. Maybe you
created a ghost in the machine and the untuning / retuning fixed it.
The manual says untuning clears all the software clibration
registers.

Karl

Power Supply:
If you have a buzz in the audio output Then the power supply may be
going.

Perhaps I should upload a short mp3 of it and let the court decide.

Would someone upload (or just email me) an mp3 of what I should be
hearing during the Dac test- just so I know what to expect in the
future?


I will try your suggestions Karl, thanks for the tips.

BTW My Xpander came to life after I pressed Untune, then ran Autotune.
The output level is much higher, and has more presence.

Before- when I posted the message about looking for someone local to
do a side by side audio comparsion- my XPander had a weak output and
sounded
dull.

Hi Tony,

Power Supply:
If you have a buzz in the audio output Then the power supply may be
going. An easy way to tell is to get a new large capacitor of the
same value and voltage . And use jumper leads to jump it across the
suspect cap. If the buzz goes away then Replace Em. You will probobly
not be able to find exact matches. So some retrofitting may be in
order.
You probobly know this Tony, but these caps have a polarity to them.
So you have to notice where + is and put the new one in the same
way. + to +. Also you can go higher in capacitance and voltage
ratings but not lower.


Voice 1 Problem:
I suspect a bypass capacitor located at the output of each voice. I
keep seeing this part failing in more and more M12/Xpanders.( mine
included) So get a new 2.2uF 50 volt electrolytic cap. and replace
C749 (for Voice 1). It is toward the front of the board. This same
value part is all over the voice circuits. So.. It would not be a bad
Idea to get a bunch of em, and replace all Cx49s. Again you gotta
observe polarity.

I don't know about the DAC mono test, but if you can get the voices
to tune, then the DAC's probobly good.

Good Luck
Karl


--- In xpantastic@..., "Tony Cappellini" <cappy2112@...>
wrote:

Voice 1 seems to be bad, so I've turned it off.

With Voice 1 Off, This is the status of Autotune

VCOs- PASS
PW - PASS
RES- PASS
VCF- PASS
VCA- FAIL
(With VCO1 on, all the above tests FAIL.)

On Master Page, Page 2, Voices On.OFF, All Voices show FAIL

DAC Tests
DAC Mono- Page 2 LED blinks about 2 times per second (Is this good

or

bad? Nothing in the service manual about the blink Rate.

I hear a Buzz in the audio- which sounds like a sawtooth going

about 5

times per second.

DAC OFFSET- Page 2 LED blinks about 2 times per second. Good or bad?

All other tests on the Service Page are OK

Out of tune Points to the DAC, pray it's is not failed because

it's

even harder to find than the CEMs.

Can you tell if the filter still sweeps well? Or - Turn off the

VCO

waves and turn the resonace all the way up,and the cutoff all the

way

down, Mod by keyboard to see if you can play the filter like a

voice.

Self resonating? Yes.

Once we know if it's the DAC or
not we can go from there.

Also- after hitting untune on the DAC page, then doing auto tune, my
VCOs sound much better. In tune, that is.

So- it only looks like Voice 1 is fialing, and the VCA test.

Now what ?

Voice 1 seems to be bad, so I've turned it off.

With Voice 1 Off, This is the status of Autotune

VCOs- PASS
PW - PASS
RES- PASS
VCF- PASS
VCA- FAIL
(With VCO1 on, all the above tests FAIL.)

On Master Page, Page 2, Voices On.OFF, All Voices show FAIL

DAC Tests
DAC Mono- Page 2 LED blinks about 2 times per second (Is this good or
bad? Nothing in the service manual about the blink Rate.

I hear a Buzz in the audio- which sounds like a sawtooth going about 5
times per second.

DAC OFFSET- Page 2 LED blinks about 2 times per second. Good or bad?

All other tests on the Service Page are OK

Out of tune Points to the DAC, pray it's is not failed because it's
even harder to find than the CEMs.

Can you tell if the filter still sweeps well? Or - Turn off the VCO
waves and turn the resonace all the way up,and the cutoff all the way
down, Mod by keyboard to see if you can play the filter like a voice.

Self resonating? Yes.

Once we know if it's the DAC or
not we can go from there.

Also- after hitting untune on the DAC page, then doing auto tune, my
VCOs sound much better. In tune, that is.

So- it only looks like Voice 1 is fialing, and the VCA test.

Now what ?

Hi Tony,

Don't Fret, we will try to get him happy again. I have been helping
Phillip (member) off post with almost the same problems. If you
want to keep these long threads off the group feel free to send
direct emails.

OK, First off, the power supply has several outputs: A set for the
digital and display. And a analog set. So in theory the PS could be
causing the problems. You can check these with a voltmeter easy
enough. But a scope would be needeed to check ripple. BTW if you do
not have a 60 Hz-buzz on the audio output then the power supply is
probobly not the issue.

Out of tune Points to the DAC, pray it's is not failed because it's
even harder to find than the CEMs.
Can you tell if the filter still sweeps well? Or - Turn off the VCO
waves and turn the resonace all the way up,and the cutoff all the way
down, Mod by keyboard to see if you can play the filter like a voice.
Once we know if it's the DAC or
not we can go from there.

Note: These guys are getting 20+ years old, this points to Bad Caps
and old bad solder joints. It can probobly be fixed with more love
than
money.

Keep Me Posted

Karl



--- In xpantastic@..., "Tony Cappellini" <cappy2112@...>
wrote:

It looks like I won't need to do an A/B comparison with Jeremy's

wave file,

I can easily hear now that my Xpander is not working well.

Prior to this and the reason I had posted a message looking for

someone

local to the SF Bay Area was that only on 1 patch did my Xpander

sound very

bad.

I had found one voice which was flaky, so I turned it off.

Recently, I happen to hit several keys at once and could hear the

vcos being

grossly out of tune.

After trying to tune everything, I get FAIL across the board.

In the past, when I would see FAIL after running autotune, I would

wait 30

min, run it again and all tests would pass. This is not the case

now.

Fortunately, I've got a few spare CEMs which I hope are all

working, that I

can use to troubleshoot with.

I haven't looked at the service manual in years- I hope there are

some

measurements I can make with a voltmeter to give me some ideas.

I can probably borrow a scope to check for ripple on the output of

the PS

but don't really know how much ripple would be excessive for the XP

PS.

All other front panel functions & midi appear to be working

normally, so

it's probably not likely to be a PS issue.

Tony Cappellini wrote:

I don''t think so.
If this isn't on the autotune page, then I didnt do it.

When I first got my Xpander, it wouldn't tune.

In my country (England) the mains voltage is 240v. My Xpander was set to 110v so I bought an adapter, not knowing the Xpander has a 110/240v switch.

On the American voltage, it tuned perfectly, and since then it's been pretty much silent running.

I'm not sure if it'd work by going from 110v to 240v, but it shows how temperamental the Xpander is.

I hope you find the problem!

Jeremy

Have you tried the DAC Mono test in the service Page ?. If you get a
bleep , can you count period between the bleeps . Do you get no
bleeps or an almost constant tone ?. If you get no bleeps , it may be
the PSU , new caps , diodes etc. Fingers crossed it's not the DAC!

Phil.




--- In xpantastic@..., "Tony Cappellini" <cappy2112@...>
wrote:

It looks like I won't need to do an A/B comparison with Jeremy's

wave file,

I can easily hear now that my Xpander is not working well.

Prior to this and the reason I had posted a message looking for

someone

local to the SF Bay Area was that only on 1 patch did my Xpander

sound very

bad.

I had found one voice which was flaky, so I turned it off.

Recently, I happen to hit several keys at once and could hear the

vcos being

grossly out of tune.

After trying to tune everything, I get FAIL across the board.

In the past, when I would see FAIL after running autotune, I would

wait 30

min, run it again and all tests would pass. This is not the case

now.

Fortunately, I've got a few spare CEMs which I hope are all

working, that I

can use to troubleshoot with.

I haven't looked at the service manual in years- I hope there are

some

measurements I can make with a voltmeter to give me some ideas.

I can probably borrow a scope to check for ripple on the output of

the PS

but don't really know how much ripple would be excessive for the XP

PS.

All other front panel functions & midi appear to be working

normally, so

it's probably not likely to be a PS issue.

What about the DAC Mono test (pass or fail)?? I will guess that you can probably fix this by recapping the power supply board.? When I got my Xpander I had issues with the tuning tests and it being terribly out of tune and a recap fixed it.?

Chase

Tony Cappellini wrote:

What do you mean- whatever happened to it?

Well the last post on the site was in 2000, so I guessed it was
defunct. I have a lot of self sustaining patches like those demoed
and thought hey, maybe I could get in on this?

The Xevents were held by a bunch of Xpnder/M12 owners here in the Bay Area.
I participated in only two of them. Many of those people are still
around, but none seem to be interested in doing it again.
We had some good connections in those days, and it was easy to get
venues without having to put up money.

If you're interested in getting another started, put out some messages
and see who responds.

Hi Tony,

--- In xpantastic@..., "Tony Cappellini" <cappy2112@...>
wrote:

I've never been good at making a patch of a sound that I want.
Randomness is my friend;-)

I have to admit there is big fun in setting up patches that just do
unexpected things all by themselves.

I've heard this many times over the years- that the XPander ramps
are faster than the envelopes, but my ear doesn't hear this,
probably because I'm not doing something else correctly with the
ramp.

You know what, your right. I checked with my scope - no difference.
I guess it's a mind game I played on myself. While I was at it, let
me dispell another myth. It is said that if you modulate an
envelope's attack rate with the same envelope, you can get a concave
or convex slope to the envelope. Again checked with scope, and nope,
attack slope just gets longer (+ modulation) or shorter (-modulation).

Installing & running Midiox takes less timt than tho send this
email ;-)
It's not complicated- although the UI could be a little more
convenient to use when sending/receiving patches.

For one, the studio machine (running ME) is not on the net. I have a
MOTU MTC AV for midi I/O and I don't think I can run the thing with
VISTA. They barely support PC's for that matter. This means I have
make a copy and move it over there.
And two, the studio is just a general mess right now. Anyway, I plan
to do it soon because I bought some replacement backup batts, and
will have to get midiOX going to back up my patches.

What do you mean- whatever happened to it?

Well the last post on the site was in 2000, so I guessed it was
defunct. I have a lot of self sustaining patches like those demoed
and thought hey, maybe I could get in on this?

Karl

Thanks Karl,.

On of my favorite things to do: midi up my emu XL7 drum machine to my
M12 and replace each drum with a patch I write from scratch. It seems

I've never been good at making a patch of a sound that I want.
Randomness is my friend;-)

I have to tweak the drums to get them to sound good together. Try
using the ramps ( set to Zero ) instead of envelopes, the attack
sounds faster to me. Use an envelope for the decay or put the ramp
through a tracking generator.

How can you use a ramp for attack without using it's decay/ The
start/end times are not adjustable as with envelopes?

I've heard this many times over the years- that the XPander ramps are
faster than the envelopes, but my ear doesn't hear this, probably
because I'm not doing something else correctly with the ramp.

I still do not have midiOX running on my studio computer (no time) so

Installing & running Midiox takes less timt than tho send this email ;-)
It's not complicated- although the UI could be a little more
convenient to use when sending/receiving patches.

BTW what ever happened to XevenT? I really liked the concept there.

What do you mean- whatever happened to it?