Add labels to the buttons inside my app

Hi, I have this soundboard app with 45 sounds - and therefor 45 buttons. The app is based on ScrollView. When I try to edit a label, it changes the name for all 45 buttons. So I need someone to help me programmatically code a label for each button. I've attached a image that shows somehow the app is build. (15 sounds on each page. 5 x 3 buttons on each page.)