Paula, thank you so much for the kind words. We’re so glad you’re enjoying the music and vocals. ✨ For most Human Reprogram tracks, headphones are not required. The frequencies are built into the audio itself, so they can be reproduced through your phone, speakers, or headphones. Headphones can make the experience feel more immersive and may help you focus more closely on the music and affirmations, but they are not necessary to hear the frequency based audio. The main exception would be any track that specifically uses a stereo or binaural effect, where headphones can make that effect more noticeable. So in general, use whichever way feels most comfortable and easiest for you to listen consistently. 🙏🏼