PNG is the native format of the MusicPad Manager so you would first need to use pdf2image to convert all your music to this format. Once you have generated all of the PNG’s, you should be able to import them directly by opening the MusicPad Manager application. Then just select File/Import.
MusicPad Pro expects the files that are imported to be 600×800. This can be set by choosing width = 600 pixels under the “Options” button during conversion in pdf2image.
If you have any trouble converting your music, please email a sample PDF file to firstname.lastname@example.org and we will return it to you in PNG format ready to import along with any special settings that you need to select.