High pitched noise when receiving audio from alto live 802

Hello there !
So, I have no problem using my live 802 when sending audio to it via usb, but the other way around doesn't work. When choosing the live 802 as an audio source on my mac, there is this very strong high pitched noise that can't seem to go away no matter what I do. This happens whatever DAW I'm using, and happens even when choosing the Live 802 as an audio source directly from the mac preferences menu. Using various USB cables of good quality did not change a bit. The sound is very distinct and pretty loud, making it impossible to record anything ...
Anny idea how I could fix this ?

My set up :
MacBook Pro (Retina 15 inches, 2013), 2,7 GHz Intel Core i7, 16 Go 1600 MHz DDR3
Monitorings : Adams A5x
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