Download and Install CASTER app
Setup Logic Pro X Input/Output:
Open Logic Pro X.
On the top left menu open Logic Pro X->Preferences->Audio
Set the Output Device to “CASTER” Device and leave the input Device set to your audio interface.
Setup CASTER application:
Open CASTER application – installed in your Application folder.
Hit the Add application button and Add Logic Pro X to CASTER tracks:
Hit the Add Microphone button and Add your Microphone.
Choose your Monitor device to hear your stream:
Set Skype Microphone to “CASTER Stream Mix”
In the top menu select Skype->Audio & Video Settings and set the Microphone to “CASTER Stream Mix”.