Voice Select
Use a drop-down to choose voiceCheckbox
here
create a button to call up the pdfadd a button to call up the mp3 track for the appropriate voice
For help with generating checkboxes from an array, see the end section of
Here
Basically take an array of songs, call it songs then do a foreach through the array songs.foreach {...stuff...}. Within that loop do different steps: Generate an id, create a label, create the checkbox and put the checkbox inside the label.
Using a label is not only good practice; it extends the clickable area across the label text.