Hello Razer. I have been having issues with random and persistent static in the audio. I have a Cynosa Chroma and a Deathadder Elite which are both USB. I tried all other USB ports with same issue. I have ran audio signal through LED monitor, 3mm port to speaker monitors, and 3mm to headphone on both the front and back of PC.

I think I have narrowed it down to an interference from Razer products. The audio gets a low audible static when I plug in the mouse [or if there is movement on screen, like a YouTube video or gaming]. This turns to crackling static when I scroll mouse or play games. It gets more noticeable when the game is silent or louder when you increase the volume. [These sounds also persist when the PC is on mute via Windows Volume Mixer]

The other sound comes from the keyboard. This sound is a faint ringing pitch. It is noticeable when the LED cycles colors, when the intensity of the LED brightness is increased and also when you toggle the Caps, Scr Lk, or Num Lk. These pitches come off as noise that is noticeable when you are listening to familiar music or watching a movie.

The only solution I have found on the music and movie side is to unplug the Razer USB mouse and keyboard.