Troubles with live flash using

[agent_kith]

All kinds of PCM - the same.  On musicla signal - very small amplitude, like background (and my speakers are 95 db/m/w sendetive). Thet are more loud and frequent when play sine wave.  If I change pc  usb 2.0 to laptop usb 3.0 - clicks are here, but 10times more rare.   Can I attach video record somehow?

You can upload to youtube/vmeo/facebook/etc, and include it here. (Click the video icon in the editor, to the left of the smiling face).

Windows PC - I do not have at home, should borrow some laptop.

Not sure if I can help in any other way.. One other thing to try, perhaps use a different USB port? See if that works. Try different USB cables as well.