It seems something related to the keyboard I was using (Numa Compact 2).

Very good to know you have found and somewhat solved the root cause. Capturing the MIDI signals (which pianoteq does on its own, it's actually just  fishing them out of the filesystem) can give you some clues on what might be the actual reason. Perhaps the controller starts messing up with the velocity it sends?

It seems something related to the keyboard I was using (Numa Compact 2).
It still not clear why.... but when controlling Pianoteq using my Fantom 07 the problem seems not coming up....

I am checking more in deep what can cause this.

Hi,
I am experiencing a problem with Pianoteq 8.
After playing few minutes the sounds from played notes become thinner and metallic.

If I change the Piano selected in the user interface problem disappear... to come back after few minutes.

Are you sure it's an actual problem rather than a psycho-acoustic one? Some/many people experience listening fatigue with many digital pianos.

Easy way to test: use a MIDI recording, perhaps a recording of one of your own sessions which you experienced the problem with (pianoteq always records what you are playing). Listen to it (without playing) and see if you experience the problem toward the end as when you were playing live. At the same time, set up your audio chain to record the audio of the session (I don't think pianoteq itself allow you to do that, IIRC it either let you listen or record, but not both at the same time -- and if you do that separately there's always the chance that they are not *exactly* the same, because of a bug). Once you have your audio recording, which you have confirmed by listening to it "live" that has the problem (say) starting around minute 10, the next day start listening to it to confirm you "like" the minute 1, but then jump immediately ahead to minute 10 to see if it sounds "bad" (confirming the actual problem) or instead "good" (confirming the psycho-acoustic fatigue as I am speculating being more likely). In the latter case, you can go back to the start and listen to it from the beginning and double-check if the problem creeps in with fatigue.

Hi,
I am experiencing a problem with Pianoteq 8.
After playing few minutes the sounds from played notes become thinner and metallic.

If I change the Piano selected in the user interface problem disappear... to come back after few minutes.

Are you aware of any settings that could cause this?
I tried to search in the menus but I didn't find anything.

Anyone else experiencing the same issue?

Thanks in advance.

All models?

If I change the Piano selected in the user interface problem disappear... to come back after few minutes.

Are you aware of any settings that could cause this?
I tried to search in the menus but I didn't find anything.

Anyone else experiencing the same issue?

Thanks in advance.