Each songbook contained, alongside standard sheet music, a series of vertical barcodes. To "load" a song, you would:
The Ultimate Guide to the Casio VL-Tone Songbook: Missing Manual, Sheet Music, and Retro Mastery casio vltone songbook pdf
The manual PDF explains how to punch in these codes and play them back. That tiny “songbook” of codes is all you need to make your VL-Tone sound like a one-man band. Each songbook contained, alongside standard sheet music, a