How do I tell my bluetooth speaker to play music from my phone?

Joe has a Harmon Kardon Bluetooth speaker and he is having trouble playing music from his phone. It pairs with it, but he can't figure out how to give it the command to play music. Leo says that he has the Harmon Kardon Invoke and it sounds great for $100, but it may not be made "aware." He'll have to go into his phone's Bluetooth settings. On the Amazon Echo, you have to tell it to connect to the phone and then pair it in the Bluetooth settings. So he may want to try that.