A:Answer I'm aswering my own question. I bought the soundbar after reading Gina's response. Unfortunately, Gina's response is not correct.
You can use the TV remote to control the volume and power off. For powering on the soundbar, you have to use the soundbar remote. Then, sometimes, you have to use the TV remote to manually switch the audio to the soundbar.
Q-Symphony does not work at all.