Deep Sleep | Delta Waves. Posted: June 6, 2025 | Last updated: June 6, 2025. 💤 This sleep short is designed to help you fall asleep faster, reduce stress, and improve the quality of your sleep.

Designed in partnership with Universal Music Group (UMG), the feature combines songs that subscribers already know with other sound waves that promote focusing, relaxing, and sleeping.

Delta waves (0.5-4 Hz) signify a state of deep sleep. A binaural beat with a frequency between 4 and 7 Hz, for example, is more likely to align with theta brain waves, promoting sleep and relaxation.

This latter "slow-wave sleep" typically comprises up to 20% of a good night's rest—but it won't happen under disruptive conditions, such as sleep apnea, caffeine overconsumption, insomnia, or ...

Sound Therapy is Apple Music's new audio wellness collection with special sound waves, aimed at helping users focus, relax, and sleep.