Audio Out - USB and 3.5mm

Hi everyone, 

Is there a way to do audio out of the Lenovo Poly MTR systems via both USB and 3.5mm? We have a Poly Studio connected via USB and audio is going out fine but we need to use a hearing loop as well via the 3.5mm jack on the NUC and can't seem to get it to work. 

Hardware - Poly GC8, Lenovo NUC, Poly Studio, Williams Hearing Loop 

Has anyone got this working? 

Thanks, 

Thanks,