Deee, I apologize for the inconvenience you have had with the inconsistent sound volume. Please try adjusting the following Settings to improve your experience. The Auto Volume function automatically adjusts the sound to a certain level when changing channels or switching to another external input. Go to Settings > All Settings> Sound > Expert Settings > Auto Volume = On. You may also want to perform a Sound Test under Support > Self Diagnosis > Start Sound Test. If the issue persists, please reach out to us so that we can provide further troubleshooting. You can call us at 1-800-SAMSUNG, 8 AM - 12 AM EST, seven days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website. ~ Samsung Pro

Pat R, Thank you for taking the time to provide feedback on your DU6900 TV. Please know that your feedback will be shared with our internal product teams. We take pride in our products and are sorry to hear that your experience was not up to our high standards. Samsung is committed to providing the best possible product experience, quality, and value. We back this Samsung TV with a 1-year limited manufacturer's warranty, including authorized repair for manufacturer defect, if purchased brand-new directly from an authorized seller. You can see the full details of your warranty on Samsung's website. Go to Support (upper right corner) and select Warranty information. This will allow you to search for your product and view the full details of the included warranty. Please know we are available and happy to assist you with further troubleshooting or to set up a warranty appointment. You can contact Samsung Customer Support at 1-800-SAMSUNG, 8 AM - 12 AM EST, seven days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website. ~Samsung Pro

Timothy, The DU6900 does not have voice assistants built in, but they do work with external voice assistants like Alexa. You can connect them to your existing Alexa device to ask them to turn on your TV, change channels, control volume, and more. Our DU8000 TV Series and above offer voice command and built-in voice assistants. If you have an external voice assistant connected to your DU6900 TV, I would recommend configuring the sensitivity settings. If you need additional help or would like our assistance troubleshooting, please call us at 1-800-SAMSUNG, 8 AM - 12 AM EST, seven days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website. ~ Samsung Pro