Hi there, Once the soundbar is chosen as the audio source the TV volume should automatically turned off. If you are having technical issues with a Samsung TV please reach out to Samsung TV Support at: ― Phone: 1-800-SAMSUNG / Available 8 AM - 9 PM EST, Mon - Fri ― LiveChat or Email: https://www.samsung.com/us/support/#contact_us_for_support We look forward to hearing from you. -Scott