Voices require that you install additional “RAM (*DIMM)” not included with your instrument.

If you have not installed additional DIMM already, see a list of compatible products and affiliate stores at the Official Site. Yamaha recommends you purchase 512 MB DIMM in case you wish to purchase additional Voice content in the future. For DIMM installation instructions, please refer to the Owner's Manual, Appendix, “Installing the Optional DIMMs.”

If you have installed additional DIMM, but aren't sure if you have enough for the the Voice you wish to purchase, follow these instructions:

1. Press VOICE CREATOR on your instrument.
2. Press B, or LIBRARY EDIT
3. Press 8\/, or PROPERTY
4. The screen will display Memory Status. Below Wave RAM, it will show total available MB. Check this number against the RAM requirement for the Voice(s) you are interested in purchasing. Alternately, you can also try unloading other Voices that may be using your RAM.

* DIMM is the name used for a type of physical product containing RAM that can be loaded to your instrument.