New JP 8000 is haunted!

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New JP 8000 is haunted!

Post by isomz » Sun Feb 03, 2008 4:32 am

I bought a second hand JP 8000 yesterday and it's doing some weird stuff. I'll be playing a preset sound and it will suddenly edit it without me touching any buttons. I've even tried not touching the keys at all and as I sit and watch the little * will suddenly appear to indicate the sound has been edited, but I haven't touched anything. I reset it to the factory preset but it's still happening. Any ideas?

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Post by Maschinengeist » Tue Feb 05, 2008 3:09 am

Ghost edit.

It's been too long, I don't remember what exactly caused that. It's related to a voltage drop. But right off the bat I'd be at loss to tell you what it is. I'll try to find a minute to dig in my notes.

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Post by crystalmsc » Tue Feb 05, 2008 1:18 pm

as mentioned, it sounds like a hardware problem. I used to have an almost similar case with my X-station and found that actually it because of the very sensitive ribbon that I have to be carefully put my finger around that area. But in case you haven't update it to the latest os, may be it's also going to be an effective try for another possiblities.
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Post by White » Tue Feb 05, 2008 5:08 pm

Have it serviced. It may need cleaning inside.

My Microkorg started to act like that. Turned out it was some dust underneath some of the knobs.
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Post by cornutt » Tue Feb 05, 2008 6:43 pm

This sort of thing is usually due to dirty knobs or sliders. If you know the JP8000's sysex format, and you have a DAW or sequencer that can capture the sysex, you can set the JP8000 to send sysex on edit, look at the strings, and figure out which parameter is doing it.
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Post by DX » Mon Feb 11, 2008 11:44 am

There was a thread talking about this as I remember..

In mi case, It sometimes happens by any small vibration on the case when playing, which produce a slider/pot movement detection and so, the parameter drastically change to the currently slider position (for instance, if it is the Filter cutoff, the sound can go upside down).

This is not annoying for me, as it doesn't happen very often, but it is a con with the JP.
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Post by BlackGnosis » Tue Feb 12, 2008 4:52 am

My guess is dirty parts or scratchy old pots that needed replacement 6 years ago =P
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Post by Tek » Tue Feb 12, 2008 1:41 pm

Yes it's a ghost . . . . . :twisted:
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