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I'm wondering if there is any way to calibrate the Velocity Sensitive on the Kronos as I have some keys are more "sensitive" than the others.
Some keys sounds like they are being played with hard velocity even I hit it kinda soft.

I'm using the K73.

Any idea or suggestion, guys ?

Hi,

I have noticed the same issue on my Kronos 88, was wondering if I was the only one ...
It got repaired for the note cut off issue, then after a while I started to experience this velocity issue.
Before the K , I owned a CLP170 Yamaha, after 8 years it was showing the same symptom, all the keys weren' t responding to the velocity in the same way. This is a known issue with the Yam digital piano, the rubber contact need to be cleaned or replaced after a while.
So, since I didn' t want to send my K for repair for another month I have tried to move the rubber contact on the keyboard ( mean I swapped one octave from the upper side with one from the lower side ). I have found out that the keys that show the issue are not the same after that swap...
So I am pretty sure this is related to the rubber contact, the bad thing is that it appears after one month instead 8 years on my yam.
Don' t know what to do ...
It' s easy to verify if yours has the issue : just take a square box (ie a CD box) and press the keyboard while the sequencer is running: you will see in the track edit that some keys (always the same) have a higher velocity. (typically + 10). This noticeable when playing the EX piano
I would be really happy if a calibration could solve that.

You answered your own question. Swapping contacts made a difference. That means a mechanical problem. I service Keyboards in my business and rubber contacts are weak at best. They are sensitive to dust and wear out with use.

I sold my Tritons to step-up to the Kronos with full knowledge that practically all newer keyboards now use rubber contacts. The Tritons did not.

So, I intend to acquire extra contacts and if any go bad I can replace them. As a Yamaha Service Center I have not seen many problems with their contacts. I have 2 P-80's and they have been flawless so far.

Geo

Hi Geo,

Thanks for the confirmation.

Does anybody know where we could buy these rubber contact in France or in Europe ?

Dominique

Not being a Korg Service Center any longer no, not at this time. However, they likely are found in other products. I just haven't looked at them yet. My Kronos is only three weeks old! If and when I find out, I'll post it here.

Geo

I can't tell for sure it is the same on the kronos as it is on most keyboards, but I assume it is the same....

The functionality to detect velocity is done by speed and not force.

This means that there are two 'switches' per key.

When you press a key the first switch will become released triggering a timer and when it hits the second switch the timer stops and the time measured is converted into velocity.

How can this be? Well, the harder you hit the key the faster it will travel to its end position. That is just physics.

Now, if the first switch becomes sticky then the computed time will become shorter. I.e. The velocity will become interpreted as a 'hard hit'.

That is exactly right. Some early versions had a closed contact that opened when the key was first pressed and a second contact was then closed. That was called a Break/Make. B/M Now we see Make/Make. M/M.

I remember an Ensoniq keyboard back in the 80's that used a capacitive keyboard that had no contacts. Under the key was a plate of metal. The circuit board under the key had a coil etched into it. As the metal got closer to the coil, the key movement was detected. I'm suspect the coil was part of an oscillator whose pitch changed in relationship to the key. I liked the idea of no contacts for reliability. However, it wasn't THAT reliable. Plus, it had to calibrate the keyboard each time it powered up. You could fool it by holding a key(s) down during calibration. Of course we never did that!

Geo

Hi all,

I have ordered the rubber contact here:
http://www.guitar-parts.com/catalog/kor ... ip-12-note
be careful the link in the Kronos RH3 Keybed Fix Thread is not correct.

The new contact are gray, I have installed that in my K88 and now everything is fine. No more velocity issue.

Note:
1. I get the K88 in june, hoping to have a new keybed. That was not the case, I now really think that 100% of the keyboard were defective and it is really unfortunate that korg has continued shipping these keyboards, the issue was known since autumn 2011.
2. The K88 went for repair for the cut off note in july, when it came back one month later I started to experience that really bad velocity issue.
Looking closely at the (blue) rubbers that were used as a replacement they doesn't look like to be brand new (the black part if the rubber shows some stripes, whereas on the grey rubber they are fine).

Korg-san: communication and repair policy for that issue was really bad. I hope I won't have any problem in the future because I did the repair myself (which is quite easy by the way) ...

Francois: je suggere que tu mettes le lien ci dessus sur Kronoscopie, ca pourrait servir a d'autres personnes. Le service est tres bon et les frais de port pour la France reduit (~4E)

Dominique