Is it really supposed to be this noticeable?

Well it depends on the velocity calibration... Personally I find it interesting to have this delay at extremely low velocities (below 10), but if desired this is something we can change.

Thanks for the explanation. I have to say I really can't relate the way it feels compared to my felted upright, which has three separate felt strips, set close enough to the strings that by the time the hammers are going fast enough to make it through, any latency is negligible.

Anyway - I've done a quick track of some quantised crotchets playing the klopfgeist and PTQ supposedly in sync, from Vel=6 to =17 :

https://soundcloud.com/ben-crosland/pia...al_sharing

Is it really supposed to be this noticeable?

Philippe Guillaume wrote:

Chopin87 wrote:

Doesn't that happen normally even on a piano when hitting very low velocities (Vel: 5-6 or similar)? The felt seem to increases for a few more ms.

Yes, you are right, it happens also without celeste. And the increase due to the celeste felt can go up to a few more centiseconds.

Shouldn't the Mozart rail or some soft pedal in certain upright which works in the same way (bringing the action closer to the keys) mitigate this behaviour?

Yes, maybe a little bit...

Chopin87 wrote:

Philippe Guillaume wrote:

Hi Ben. This is intentional: when the celeste pedal is engaged and when you play ppp, the hammer has to push the felt strip against the strings. As the felt strip consists of one single piece without cuts separating each note, it is relatively quite rigid and heavy and it takes a certain time for it to reach the strings when playing at very low velocities. In the most extreme case (velocity 0) it doesn't even reach the strings. At very low velocities (even at velocity 0), the first thing you hear, right from the beginning, before the felt hit the strings, is the small woosh produced by the damper leaving the strings. Note that above velocity 10 the delay is already significantly reduced, and becomes negligible above 20.

Doesn't that happen normally even on a piano when hitting very low velocities (Vel: 5-6 or similar)? The felt seem to increases for a few more ms.

Yes, you are right, it happens also without celeste. And the increase due to the celeste felt can go up to a few more centiseconds.

Shouldn't the Mozart rail or some soft pedal in certain upright which works in the same way (bringing the action closer to the keys) mitigate this behaviour?

Philippe Guillaume wrote:

Ben Crosland wrote:

Hi,

Just wondering if there’s any progress on a fix for the huge latency you get at the very lowest velocities when using the felt pedal? Just installed 7.4.2, and it’s still there.

Hi Ben. This is intentional: when the celeste pedal is engaged and when you play ppp, the hammer has to push the felt strip against the strings. As the felt strip consists of one single piece without cuts separating each note, it is relatively quite rigid and heavy and it takes a certain time for it to reach the strings when playing at very low velocities. In the most extreme case (velocity 0) it doesn't even reach the strings. At very low velocities (even at velocity 0), the first thing you hear, right from the beginning, before the felt hit the strings, is the small woosh produced by the damper leaving the strings. Note that above velocity 10 the delay is already significantly reduced, and becomes negligible above 20.

Doesn't that happen normally even on a piano when hitting very low velocities (Vel: 5-6 or similar)? The felt seem to increases for a few more ms.

Yes, you are right, it happens also without celeste. And the increase due to the celeste felt can go up to a few more centiseconds.

Ben Crosland wrote:

Hi,

Just wondering if there’s any progress on a fix for the huge latency you get at the very lowest velocities when using the felt pedal? Just installed 7.4.2, and it’s still there.

Hi Ben. This is intentional: when the celeste pedal is engaged and when you play ppp, the hammer has to push the felt strip against the strings. As the felt strip consists of one single piece without cuts separating each note, it is relatively quite rigid and heavy and it takes a certain time for it to reach the strings when playing at very low velocities. In the most extreme case (velocity 0) it doesn't even reach the strings. At very low velocities (even at velocity 0), the first thing you hear, right from the beginning, before the felt hit the strings, is the small woosh produced by the damper leaving the strings. Note that above velocity 10 the delay is already significantly reduced, and becomes negligible above 20.

Doesn't that happen normally even on a piano when hitting very low velocities (Vel: 5-6 or similar)? The felt seem to increases for a few more ms.

Hi,

Just wondering if there’s any progress on a fix for the huge latency you get at the very lowest velocities when using the felt pedal? Just installed 7.4.2, and it’s still there.

Hi Ben. This is intentional: when the celeste pedal is engaged and when you play ppp, the hammer has to push the felt strip against the strings. As the felt strip consists of one single piece without cuts separating each note, it is relatively quite rigid and heavy and it takes a certain time for it to reach the strings when playing at very low velocities. In the most extreme case (velocity 0) it doesn't even reach the strings. At very low velocities (even at velocity 0), the first thing you hear, right from the beginning, before the felt hit the strings, is the small woosh produced by the damper leaving the strings. Note that above velocity 10 the delay is already significantly reduced, and becomes negligible above 20.

What is the exact problem?
I don't get any latency

If you engage the felt pedal, notes with extremely low velocities play late.

Just wondering if there’s any progress on a fix for the huge latency you get at the very lowest velocities when using the felt pedal? Just installed 7.4.2, and it’s still there.