I think both terms apply. Unconscious means not awake or lacking awareness. Subconscious refers to thoughts, actions or brain processes of which a person is n

I think both terms apply. Unconscious means not awake or lacking awareness. Subconscious refers to thoughts, actions or brain processes of which a person is not directly aware. Subconscious might arguably be more applicable in this context. However, now they can actually play their songs together in real-time. :)