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Re: Hanging voice
¿ªÔÆÌåÓýHello, ? Did you run a memory test. It¡¯s in the service page. I could see a faulty memory chip causing this problem. ? The xpanders have individual gate and CV inputs for each voice. ?Maybe there is a problem with the voice 6 gate input, causing a stuck on note. ? ? Best Luck Karl Sent from for Windows 10 ? From: swisstony123456789
Sent: Monday, October 5, 2020 3:20 PM To: [email protected] Subject: [xpantastic] Hanging voice ? Dear all, I've got an xpander with a misbehaving voice number 6. When I switch the synth on voice 6 hangs and won't switch off. It's almost like the drone of vco2 but it's there even even when vco2 is not active. It's not on all patches particularly the stabby sort, but it is on all pads. Has anyone got any suggestions at what I might poke about at or what it might be? When voice 6 is off and I restart the synth it performs faultlessly. Many thanks in advance Shaun ? |
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The meaning of the numbers on the front panel
I have a feeling I'm going to feel like a dummy for asking this, but does anyone know the meaning of the numbers on the front panel under the Single/Multi Patch Page Select section that are inside the diagram/flowchart circles? Example: VCO1 section shows Frequency with a number 1 inside a circle and VCA shows a 6 inside a circle. Second example: FM/LAG shows FM VCA with a number 1 inside a circle and LAG shows a 5 inside a circle.
I've held off on asking thinking I'd find it in the owner's manual, but I haven't found it yet. Rob |
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Re: A better Xpander Service Manual
Well, stop the presses. Found an archive of very high quality synth manuals, including the Xpander Service Manual. ?It's very hi-res. (and the PCB maps are in color, sweet) ?It also seems to include most of the historical change orders, which are always fun to peruse.
Enjoy: http://www.synfo.nl/pages/servicemanuals.html |
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Re: Auto Tune Failures Gameplan
This is a nice compilation of possible (and popular) failure points. ?Of course, it¡¯s also important to take a ¡®do no harm¡¯ approach by logically diagnosing the problems before touching anything. ?For example, you mentioned that your Xpander is ¡®failing all auto-tune tests¡¯. ?Do you mean all tests for all voices? Some voices and some tests? ?The answers can dramatically narrow down the possible causes and cures.
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Perhaps we can develop a trouble shooting tree¡
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One place to start might be to run the auto tune tests on one voice at a time. Once you¡¯ve done this, you can narrow the possibilities. ?Below are some gross assumptions you can make on possible trouble spots, depending on the result of the testing. ?(Caveats: This is not a comprehensive list; More could be added surely! Note that possible causes are only anecdotally listed in order of likelihood to be a cause, based on my experience and reading the forum. Also note, some of the components mentioned below have never been reported to be a cause of problems. I only list them as possible culprits.)
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This can also help reduce some common false assumptions. ?(For example, I¡¯ve noticed a few times in the history of the forum, the CEM 3374s are sometimes the first thing people suspect when there¡¯s any kind of auto-tune failure. But these are not the most common failure point, and should only be suspect under certain types of failures, at the least because they are expensive and rare nowadays!)
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Xpander Troubleshooting Procedure (prototype!):?
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-Turn off all voices but the one being tested: Master Page > Page 2 > Voices ON/OFF.
-Run auto tuning on that one voice: Tune Page > ALL.
-Note which tests failed for that one voice.
-Return to first step, turn off the voice you just tested, turn on the next one to be tested.?
-Repeat for all 6 voices.
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Results:
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Every individually tested voice fails all tests:
All individually tested voices fail the same test/s:
Only some voices fail all tests:
Only some tests fail for some voices:
All Voices pass all tests, but all have muted or distorted sound: (rare?)
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David, maybe you can run the tests per voice and we can put this tree to the test!
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Re: Auto Tune Failures Gameplan
What is in file section is laters version.
Only this post is older version. --- >> Message from Moderator: The file (Oberheim Xpander Cheat Sheet.doc) was moved under the Documents folder: /g/xpantastic/files/Documents |
r1n9o
David Reynics