Five minutes a day of breathing with a long, slow exhale lifted mood more than mindfulness meditation in a month-long trial.Balban, Spiegel, Huberman et al., 2023 · Stanford University School of Medicine
Calm music at bedtime helped people rate their sleep better.Jespersen, Vuust et al., 2022 · Cochrane review · Aarhus University
Studies cited for context; they don’t endorse Sonic Heal.