Passive listening to music on a daily basis helped in reducing BP of 12 elderly subjects. The experimental group listened to selected songs for 25 minutes every day, for four weeks. BP was measured twice a week. There was a significant decrease in the mean BP: 11.8 mmHg in the SBP and 4.7 mmHg in the DBP . Elderly subjects have shown statistically significant reduction in SBP and DBP after 12-minute audio relaxation program . STUDIES ON EFFECT OF MUSIC ON HRV: Whether music causes an increase or decrease in HR, remains a mystery . Several studies reported that under various conditions music decreases sympathetic nervous system (SNS) and increases parasympathetic nervous system (PNS) activity as measured by HR and HRV, indicating physiological relaxation . No difference in HR or HRV was observed by a few investigators . However, an increase in HR has also been reported by some . SALIVARY STRESS MARKERS: The salivary glands receive sympathetic and parasympathetic innervations. The major enzyme that is released on sympathetic stimulation is alpha (α) amylase. Thus it is presumed that, changes in salivary alpha amylase indicate the activity of the SM system during stress. Further, both salivary cortisol and alpha amylase have been used by number of researchers recently to quantify stress or as biomarkers of stress. Nevertheless, it has also been put forth that salivary amylase activity is an index of plasma norepinephrine levels under a variety of stressful conditions. STUDIES ON EFFECT OF MUSIC ON EEG: In one study where EEG was recorded after giving alpha music to about ten subjects, it was observed that increase in the maximum amplitudes of Alpha waves either after 6 minutes or after 12 minutes of alpha music. However, the maximum amplitude of beta waves showed a decline of up to 40% from the initial value. These results, namely, the increase in Alpha activity and decrease in Beta activity indicate that subjects experience `relaxed alertness'.