[PROBLEM] White noise occurs at random while playing

[TheOldPresbyope]

Maybe as an addition: I already tried to research this and I found mention of  "snd-usb-audio.quirk_alias" for white noise between songs.
I tried that (adding a "snd-usb-audio.quirk_alias=..."  ) to cmdline.txt, however that seems to have done nothing.

Umm, the whole quirks and quirk-alias thing is a bit messy. As I understand it,

• if a specific vendor-product (aka a device) has a "quirk" that has already been dealt with in the kernel (in a routine named quirks.c, naturally)
  
• then one can use the quirk-alias mechanism to apply the same solution to a different vendor-product
  

Here's the option definition in the ALSA docs

quirk_alias

    Quirk alias list, pass strings like 0123abcd:5678beef, which applies the existing quirk for the device 5678:beef to a new device 0123:abcd.

Did you have the two vendor_id:product_id pairs you need?

Regards,
Kent