The intervention involves listening to specially designed filtered and modulated music that is tailored to enhance the individual's auditory system's ability to process and respond to auditory stimuli.

The control condition involves listening to music that is not filtered and modulated.

Listening to specially designed filtered and modulated music that is tailored to enhance the individual's auditory system's ability to process and respond to auditory stimuli for up to five hours.

The 9-question Patient Health Questionnaire (PHQ-9) is a self-report screening tool for adults in primary care settings for assessing the presence and severity of depression symptoms. Items are aligned with the DSM-5 diagnostic criteria for MDD and queries the individual's experience in the past two weeks. Likert-type responses range from 0 ("Not at all") to 3 ("Nearly every day"). Good reliability and validity have been demonstrated. The PHQ-9 score is the key outcome variable for MDD symptoms.

The total score is obtained by summing the values of the seven items. The total score ranges from 0 to 27, with higher scores indicating greater severity of depressive symptoms.

The Generalized Anxiety Disorder 7 (GAD 7) is a self-administered measure of the frequency and severity of generalized anxiety disorder symptoms based on seven DSM-5 diagnostic criteria for GAD. It is typically used in outpatient and primary care settings. Response options are a Likert-type scale ranging from 0 ("Not at all") to 3 ("Nearly every day"). An additional question is a global rating of the severity of the patient's anxiety over the past 2 weeks. The measure is considered sensitive and has shown adequate internal consistency reliability and validity for assessing anxiety across a wide range of samples and settings. The GAD-7 score is the key outcome variable for GAD symptoms.

The scoring involved summing the values of all seven items to obtain a score between 0 and 21. Higher scores indicate greater severity of anxiety symptoms.

The Body Perception Questionnaire - Short Form (BPQ-SF) is an abbreviated version of the original self-report measure of body awareness and autonomic reactivity. The questionnaire consists of two subscales, Body Awareness (26 items) and Autonomic Nervous System Reactivity (20 items). The Likert-type scale answers range from 1 ("Never") to 5 ("Always"). Total scores for each subscale, which are key outcome variables, are summed and compared to T-scores in the BPQ Manual.