How do I connect multiple microphones to sing vocal Harmonies on PlayStation 4?

The PlayStation 4 assigns peripherals on a profile basis. Therefore, in order to connect multiple microphones for use in Rock Band 4, you will need three separate profiles to host each microphone. It is perfectly fine for your microphone profile to also be a controller profile. Here's how to connect your microphones:
 

1. Plug in the first microphone.
2. The PlayStation 4 will pop-up a screen asking you to assign this microphone to a profile.
3. Assign the first microphone to the profile you are using for your vocalist.
4. Plug in the second microphone and assign it to a different profile once the pop-up appears. This can be a profile one of the other instruments is using, or it can be a profile without a controller at all.
   • PLEASE NOTE: If you assign a microphone to a profile that already has a microphone associated with it, the original microphone will be removed​.
5. Plug in the third microphone and assign it to yet another profile once the pop-up appears.

You can do this process at any time. Keep in mind that if you change which profiles are assigned to which controller or log out of a profile, the microphone associated with that profile may drop out of play. If this happens, you might need to unplug your mics and reconnect them in order to get them working again.


Additionally, your profiles do NOT need to have PSN accounts for this to work. You can make a permanent local User without signing it into a PSN account or make a Guest profile on the PlayStation 4 system level in order to do this. The option to create new Users will be on the same screen you choose profiles on.

Guest profiles are temporary and will disappear off your PlayStation 4 once they are logged out. If you use Rock Band 4 regularly, you might want to make local Users named "Mic2" and "Mic3" so you can get Harmonies set up more quickly in the future!