D1000 pitch changes without touching the knobs

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reverberation
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D1000 pitch changes without touching the knobs

Post by reverberation » Thu Feb 11, 2016 6:04 am

Hello,

I had to sell my D1000 to finance an Easel. I miss it already though.
Might try to find another one when I've got money again.

Well, anyway. I shipped the D1000 to the buyer and now there seems to be some weird thing happening. There's like a pitch thingy going on when he plays the D1000. Not twisting anything, still there's changes happening.

Please check this clip:




What could be causing this?
I've told the buyer to test the D1000 in different rooms with different power sources. Perhaps there's something in his studio interfering with the D1000?

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metasonix
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Post by metasonix » Thu Feb 11, 2016 2:42 pm

You mean that tiny little change of pitch? Normal. No idea why it does that although I tend to suspect his AC power mains are not very stable.

He wants a D-1000, he learns to put up with "flaws".

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papz
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Post by papz » Fri Feb 12, 2016 8:19 am

I confirm mine also does.
It's part of the beast's behaviour.

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Hainbach
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Post by Hainbach » Fri Feb 12, 2016 3:55 pm

Mine does not.

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timoka
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Post by timoka » Sun Feb 14, 2016 6:56 am

mine does that too, but not so obvious, i have some quartet tone shifts. but this example seems a bit extreme to me...

reverberation
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Post by reverberation » Sun Feb 14, 2016 8:57 am

I told him to try it elsewhere and it worked. Must be power failure in his studio. Something interfering.

Now he has problem with triggering the D1000 sounds from an external sequencer. He says the sounds "double trig".
He's using a MFB SEQ1.

What could be causing this?
I was thinking perhaps it's like the difference between trig and gate.
Trig only send one pulse, right? But gate is two - one when the "note" is triggered and one when the note stops playing. For instance, when you press a key and lift the finger again.

Is there a solution for his problem? Could it be a gain issue, too hot signal or the opposite?
The strange thing is there's a youtube clip where someone's using the exact same combo. D1000 + SEQ1.

Before selling and shipping the D1000, I made this video where I show that everything works, including triggering the sounds from an external sequencer. In this case the Korg SQ1.



I guess if he doesn't solve this, there will be a D1000 for sale pretty soon...

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metasonix
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Post by metasonix » Sun Feb 14, 2016 5:20 pm

reverberation wrote:Now he has problem with triggering the D1000 sounds from an external sequencer. He says the sounds "double trig".
He's using a MFB SEQ1.
The pulses from the SEQ1 are too long. We tried an MFB SEQ-02 and found it produced short pulse outputs and worked perfectly. He's using the wrong sequencer.



Tell him to get a Triggerman. Please.

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Crowyote
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Post by Crowyote » Mon Feb 15, 2016 6:48 am

reverberation wrote: I guess if he doesn't solve this, there will be a D1000 for sale pretty soon...
I'll take it, if he doesn't want it. :deadbanana: :bop:

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Hainbach
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Post by Hainbach » Mon Feb 15, 2016 11:26 am

Reverberation, I would quit giving tech support to the buyer. He has bought a machine that is full of quirks and he needs to master it instead of bugging you.

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papz
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Post by papz » Tue Feb 16, 2016 7:29 am

Could this be related to the electrolytic caps ?
From memory, when I did measurements in my D-1000, I noticed about 24V on a 16V rated one.
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metasonix
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Post by metasonix » Wed Feb 17, 2016 5:17 am

papz wrote:Could this be related to the electrolytic caps ?
From memory, when I did measurements in my D-1000, I noticed about 24V on a 16V rated one.
No, because the capacitor would have exploded. What AC voltage were you feeding it?

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Post by papz » Wed Feb 17, 2016 8:28 am

I was also surprised it didn't explode. I'll check again.

I use this AC PSU http://www.schneidersladen.de/en/metaso ... 12vac.html
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Post by papz » Wed Feb 17, 2016 2:43 pm

I re-checked, there's actually about -19V (slightly fluctuating) on the negative pole of this cap.

Image
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Post by metasonix » Wed Feb 17, 2016 6:20 pm

That should be okay. Electrolytic caps always have a 25% or more underrating. We've had very few problems with those caps.

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papz
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Post by papz » Wed Feb 17, 2016 6:28 pm

OK thanks
So far it works and I love it :sb:
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Post by papz » Tue Jun 25, 2019 5:17 pm

The pitch instability got very strong in my D-1000. This was because of the pots. Some were erratic, wobbly, scratchy, I replaced them all and it really improved the global stability and setting accuracy.

Eric recommended those 1M audio ones, are ok for all 4 sound modules but the clock one is 100k lin.
https://eu.mouser.com/ProductDetail/Alp ... 2FSQ%3D%3D
They have a shorter shaft, which is not a bad thing (long shaft with the knob in the air causes more stress to the pot, which is not screwed to the panel) but is too short for the original soft touch skirted knobs. I swapped them with my S-2000's knobs before I get new ones.
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Post by metasonix » Mon Jul 01, 2019 7:32 pm

papz wrote:Eric recommended those 1M audio ones, are ok for all 4 sound modules but the clock one is 100k lin.
https://eu.mouser.com/ProductDetail/Alp ... 2FSQ%3D%3D
Those are the only ones readily available from a distributor, that I can find. Alpha still makes other values and shaft lengths, but they have a 2500-piece minimum order.

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Post by darmklacht@gmail.com » Wed Jul 17, 2019 8:02 am

holy crap!

I wish my d-1000 was as stable as the one in the video. There is no way I can get a halfway steady pitch. some pitches can´t be dialed in at all as it directly moves to other piches as soon as release the knob. this goes way beyond the semitone region. sometimes I´m more lucky playing with the CV knob to find certain piches. Its been that way since I bought it (used) and figured it was part of the `quirks` everyone was talking about... but hearing this one and reading that some models are even more stable gets me thinking mine is not 100% up to spec

I tried it with another (reccomended by metasonix) PSU and in diffrent buildings so I just figured out this is how theese buggers roll. the only time it seemed more stable was when I was using a PSU with 18v AC

Papz: does that seem similar to what you where experiencing? my pots dont crackle though

The d-1000 still is fucking awesomesauce but the pitch stability issue on mine makes it difficult to improvise with and would love to improve on it.

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Post by papz » Wed Jul 17, 2019 8:30 am

What made me suspect the pots is not only the crackling but the pitch jump that occured when I touched the pot.
Using the CV pot as a fine tune works fine, actually with mine I mostly manage pitch changes with this pot.
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darmklacht@gmail.com
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Post by darmklacht@gmail.com » Wed Jul 17, 2019 8:50 am

thanks papz! :sb:

Ok Interesting. mine changes pitch as soon as I touch the knob or release it. the volume knob doesnt seem to be as affected by this neither does the clock speed knob. does it make sense that just the three tune knobs would be flakey?

anyone else with this problem?

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papz
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Post by papz » Wed Jul 17, 2019 1:23 pm

You're welcome.
The sweet spot area on the frequency pots course is quite small, therefore they are more affected by even small changes. On the volume ones it was rather cracklings.
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Post by ritchiedrums » Wed Jul 17, 2019 4:36 pm

:lol: :lol: You mean that Tube Drum machine isn't STABLE!?!?! :lol: :lol:

:agony:

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Post by papz » Thu Jul 18, 2019 9:03 am

We're not talking about the small drift which is part of the D-1000 character and charm but about serious instability caused by faulty pots that make an accurate and durable tuning impossible.
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Post by darmklacht@gmail.com » Fri Jul 19, 2019 2:17 am

Well papz,

I think soon I will need to send you my d-1000.

I don´t want to but I guess I have to. I love the thing to bits for its sounds its incredible dirty but with oh so natural groove.

Part of me is glad to hear its faulty. I really hated how much luck was needed to dial in a lower frequency. I´m not talking about exact and stable pitches. but it was always just slowly turning the knob slightest bits and then releasing it and then then see what pitch it would eventually settle on. turning left frequently gave me higher pitches :despair: some more determination on part of the machine wouldnt be a bad thing.

I´m also a bit annoyed I thought this would have been what many considered to be character... I paid a premium for this device but it arrived in this state. spending more to get it in shape does blow a little. looking forward though to making a bit more stable racket!

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