You are correct. Any artistic creativity always comes from heart. We live in mind (ego is called as brain child) and God’s footprints are embossed in our heart. Meditation just helps one to reconnect with one’s heart. In creative people it happens automatically and a little effort may help them achieve that state deliberately or even for 24x7. But their ego is biggest hurdle in achieving it. This is the case with normal human being like us too, just same effort because our ego is not that much big hurdle.