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        MIDI-OX >> Mapping Questions >>  Disabling midi messages from a single sensor 
        
(Message started by: boyanmw on Mar 13^th, 2019, 3:34pm)

Title: Disabling midi messages from a single sensor
Post by boyanmw on Mar 13^th, 2019, 3:34pm

Hi everybody,
I own SL88 Studio /Fatar TP100LR keybed with 3 sensors/, not bad controller ,but the distance between the graphite contacts on the rubber strip is too close /they are 3 for each key/ and when I play easy, gentle, I get often midi notes interrupted - short midi note with desired velocity, brief interrupt /caused by slight unintentional move of the hand/, followed by normal length midi note with near zero velocity. And this is only because they placed 3 contacts per key and the key has about 1.5 mm move from off to on. It's terrible.

- My question is- is there a way to isolate the middle 2nd contact, so its midi messages only to be disabled with some kind of mapping?

As far as I know, other manufacturers such as Arturia, Nord, etc. do use the same Fatar keybed, but with 2 sensors enabled only, most likely because of this abnormal short distance between the contacts.
Thanks in advance for any help ;)

Title: Re: Disabling midi messages from a single se
Post by Breath on Mar 18^th, 2019, 9:56pm

Hi
that sounds like a faulty keyboard I would take it back for repair if you can.
If not, I would strip it down and make sure things haven't come loose.

Although Fatar don't seem to want to make the mechanical details too public, it looks like a standard 2 contact velocity sensing key bed to me.
I couldn't see the third contact from their web pictures.

There is not much Midiox can do as it couldn't distinguish between a faulty note and a deliberate staccato.

Sorry I can't be of more help
Royce

Title: Re: Disabling midi messages from a single se
Post by boyanmw on Mar 19^th, 2019, 2:28am

Hi, thanks for your answer.
Actually I fixed it.
And the reason is: sensors are too close; I lifted the circuit board with 1 mm. from the inner side, the distance btw sensors is now increased, no problems anymore; will upload a video at YT soon /I'll post a link here if you are interested/. This is a constructive issue, who can expect...
Edit: About the sensors- I was wrong, they are 3, the first one is off/sus/on; the second is velocity sensing, the third one generates sound. They announced "three sensors for a key" and I expected a triple sensor system inside like on Casio or Kawai, something advanced and improved. Nothing of the sort. There are three graphite contacts on a single circuit board under the keys.

Title: Re: Disabling midi messages from a single se
Post by Breath on Mar 19^th, 2019, 9:23pm

Hi
Glad you fixed it.
It is not something I have come across before.
I'll look forward to the video

All the best
Royce

Title: Re: Disabling midi messages from a single se
Post by boyanmw on Mar 25^th, 2019, 3:56pm

Hi Royce,
The video is uploaded here-
https://youtu.be/kwGEMZhk1tA
I'll appreciate your comments.
Best,
Boyan

Title: Re: Disabling midi messages from a single se
Post by Breath on Mar 25^th, 2019, 7:31pm

Hi Boyan
very well researched and looks close to totally fixing your problem.
After so much careful work I would let Fatar know and see if they have any thoughts especially as this look like their flagship keyboard.

Well done

All the best
Royce

Title: Re: Disabling midi messages from a single se
Post by boyanmw on Mar 26^th, 2019, 7:09am

Thanks for your kind words, Royce.
I suspect they know what they did. Other owners who asked the SL support about this issue, got a reply to apply a grease on the plastic mechanism and everything will be fine... I don't believe they will admit that the SL Studio controllers have some kind of structural imperfection in public. I'm not in a hurry to let them know about the video, maybe someone of the channel viewers will do this.
Best, Boyan