Be sure to add me to your favorites list Yamaha SY77 Original Demo Sound and Sequence Floppy Disk for SY-77 This is an original Yamaha floppy disk diskette for the SY77 synthesizer keyboard. Cosmetic condition of the disk is very good (and it's now 30 years old), and it works great in your SY77s floppy disk drive, as it was tested and used by me. This is a demonstration disk that uses both the FM synthesis and AWM sampled sounds of the SY-77, with new sounds and sequence data. The disk is in great shape and comes in a protective plastic sleeve. Original Yamaha accessory, made i Japan! * Note, please make sure that your SY77 disk drive is working correctly before purchasing this disk, as the floppy disk drive is the first thing to fail on these types of keyboards, which are more than 30 years old now. If you've just bought an SY77, it's best to try to save to and load from a blank disk first to make sure it works before you try a disk like this one. If it doesn't work, it's FAR more likely that the drive is bad, than the disk. Thank you! Please check out my Store!