. >> our thanks to fbi director robert mullueller. please remain seated at the conclusion of the program until the director has left the room. i am a former special assistant to the president. this meeting of the commonwealth of california is adjourned. [applause] [applause] >> good evening. welcome to the meeting of the commonwealth club and forum, connect your intellect. you can find us online. you can follow the best of our conversations on twitter. i am the author of the "this is your brain on music. " i am a professor of psychology and behavioral neuroscience. i am delighted to introduce you to my friend, one of my famous -- favorite guitarists and musicians. he discovered the guitar at a young age. he has played at notable vilnius such as the -- notable venues such as montrose and carnegie hall. >> i would like to start by saying that in the last 15 or 20 years of my research, one thing i found most surprising as a musician myself in exploring music and the brain is how -- discovering where it is that music is. i always imagined