You are here

jx8p purchase goes out of tune??

For fans of synths, pianos or keyboard instruments of any sort.

jx8p purchase goes out of tune??

Postby slightly » Sat Mar 21, 2020 3:56 pm

bought a jx8p before xmas, first thing I noticed recently was frequent intermittent crackling,
I sprayed deoxit into the h m l switch on back and the crackling is gone

now what I noticed is It can be sitting there two hours on, before I go to use, then I try playing a bass line from a patch in poly mode all is fine for about ten mins then everything goes badly out of tune


Cant really afford a service at the min but might have to try somehow but with these being DCOs I thought it would never have gone out of tune?

any thoughts on what might be issue
slightly
Regular
Posts: 308
Joined: Wed Sep 14, 2005 12:00 am

Re: jx8p purchase goes out of tune??

Postby Wonks » Sat Mar 21, 2020 6:29 pm

Is it being sequenced from a computer or is this live playing?

There might be something sending a pitch-shift message which isn't getting cleared - or the unit's pitch bender is moving and not returning to a zero value?
User avatar
Wonks
Jedi Poster
Posts: 10683
Joined: Thu May 29, 2003 12:00 am
Location: Reading, UK
Correcting mistakes on the internet since 1853

Re: jx8p purchase goes out of tune??

Postby slightly » Sat Mar 21, 2020 10:08 pm

Well, Im using ableton with it at same time, however right now when this is happening, Im not playing a midi sequence,"back to it" but I have been using a midi keyboard into ableton to play the jx8p the last few times when this I think might have started happening

maybe only once before this I was using the jx8p itself with programmer and didnt noticed this with ableton open

but its fine for about 15 mins this way, and then really starts to drift

I did power off on and it wasnt as bad so it seemed but still weird and would go again
slightly
Regular
Posts: 308
Joined: Wed Sep 14, 2005 12:00 am

Re: jx8p purchase goes out of tune??

Postby Martin Walker » Sat Mar 21, 2020 11:45 pm

Wonks wrote: ...or the unit's pitch bender is moving and not returning to a zero value?

If you've already had to spray DeOxit on a switch, random pitch bender messages could indeed be the trouble - I've had similar problems in the past, when even slight vibrations nearby have resulted in pitch bend data coming out of the keyboard.

For a first quick test, try moving the pitch bend up and down a few times and then leaving it alone to see if the problem disappears. If it does, it's time to open up and use FaderLube of some description.


Martin
User avatar
Martin Walker
Moderator
Posts: 15126
Joined: Wed Jan 13, 2010 9:44 am
Location: Cornwall, UK