Thank you. These usb host issues are specific only on this Hauppauge WinTV-dualHD USB tuner? On Rpi4 I tested USB DVB-S2 DVBSky S960 and DVB-T2 TBS5520SE and there are work perfectly, without any video-audio glitches.
Do you have any solution for this Hauppauge WinTV-dualHD USB tuner?