With a setting of 300 pipes/key and 34 white keys pressed gives a polyphony of 10200.
Audio buffer 256 and sample rate 96 kHz. No audio interruptions..
At that moment, the CPU cores are not charged 100% and on the HW performance screen the CPU shows green and only 2 yellow leds.
So I can press more keys ........ Maybe I will do a re-test later.
A picture: <removed>
(link and picture will be removed after some days).
I'm satisfied. No audio and polyphony problems at all.