Sing, play music, speak in soothing tones, whatever it is you prefer to do... do it. I love music. I love singing, playing, listening... everything related to music, I love it. As I want my child to love music as well, I started singing to her and having her listen to a variety of songs and genres while she was in my belly.
Now, we spend time each day singing and dancing to my favorite tunes. When I'm in the shower, I sing "Amazing Graze" to her as she patiently waits in her bouncer. When I'm cooking in the kitchen, we jam out to Brandi Carlile and the Avett Brothers.
I can honestly say Emma is so happy when I'm singing to her. Her eyes light up, a huge smile stretches across her ridiculously chubby face, and she tries to laugh. That little half laugh that sounds like a cough? That's what she does.
Lately, her favorite song seems to be "The Only Exception" by Paramore. She gets so excited when I sing the chorus. It's probably because of the repetitive sounds and tones, but I like to think she knows the lyrics are meant for her. : )
Everyone knows music is believed to help stimulate the baby's brain and emotional development, but if you would like to see the research for yourself, I've listed a few sites below that I have found helpful.
Baby Center: Music and Your Baby