I have a Chord Mojo and a Burson Soloist SL MK2 amp. I connected the Mojo to my computer with a usb to micro usb cord and that works fine, but when I connect it to the Burson Soloist with a 3.5mm to RCA cable and plug my headphones into the amp, I just hear a screeching noise. This is my first amp and dac and I think I might be making a mistake with the cord choice? There is only RCA outputs on the amp and a 3.5mm coaxial output and optical output on the Mojo with two headphone inputs to choose from along side two headphone inputs. anyone know why the amp isn't working? Everything is new.