• The best audio files to use are either .mp3, .wma or .m4a files.
• For lyrics and other text, use any txt format (.doc, .txt, .rtf, .docx, .wps, etc.)
• If you scan your material, any graphics format is ok (.jpg, .gif, .tif, .pdf, etc.)
• Do NOT use video or movies (.mov, .wmv), .cda, .wpl or .itl files 
• We also suggest converting (huge) .wav files to .mp3 or .wma

If you're not sure, just contact us (also, we can supply a free converter)