the SOUND intervention is a new and innovative method of applying musical activities in a circle consisting of elderly people with mild-to-moderate dementia, caregivers, family caregivers and young people.

The intervention involved active (vocal and rhythmic production) and passive (listening to musical pieces) musical activities accompanied by motor coordination exercises. It consisted of 12 meetings (2 per week for 6 weeks) of 45 minutes each.

The World Health Organisation- Five Well-Being Index (WHO-5) is a short self-reported measure of current mental wellbeing.The WHO-5 consists of five statements, which respondents rate according to the scale below (in relation to the past two weeks): All of the time = 5; Most of the time = 4; More than half of the time = 3; Less than half of the time = 2 Some of the time = 1; At no time = 0. The total raw score, ranging from 0 to 25, is multiplied by 4 to give the final score, with 0 representing the worst imaginable well-being and 100 representing the best imaginable well-being.

The cognitive status has been evaluated by the Montreal Cognitive Assessment (MOCA) test. MOCA is an assessment tool used globally to detect early onset of dementia among people of old age. The tool is a one-page 30-point test that the physician can administer to check the memory, language, recall, and other markers of cognitive acuity of a patient. Normal cognition: 26-30 points; Mild Cognitive Impairment: 18-25 points; Moderate Cognitive Impairment: 10-17 points; Severe Cognitive Impairment: under 10 points.

The Burnout Assessment Tool (BAT) is a self-assessment questionnaire that measures parameters associated with Burnout. All items are expressed as statements with five frequency-based response categories (1 = never, 2 = rarely, 3 = sometimes, 4 = often, 5 = always). The total burnout score is calculated as a mean of all 23 items, and a high score is indicative of high levels of burnout.