Yamaha is marking the tenth birthday of its Motif synthesizer by offering a free 10th Anniversary Motif Pack, to anyone who buys a Motif XF, the latest version of the the company’s best-selling synthesizer keyboard, before 8/31/12.

The 10th Anniversary Motif pack includes:

• a 512MB Flash board (FL512M) for uploading customized sounds and expanding the keyboard’s memory
• the Chick Corea Mark V Electric Piano Sample Library, which features sampling of the sounds created on Chick’s vintage keyboard
• a YC-B3 Organ Tome Wheel Emulation VST
• a Steinberg Prologue Analog Synthesizer VST
• GEN16 Z-Pack Zildjian Cymbal VST with FXpansion Yamaha Maple Custom Drum Kit
• Keyfax New Media “Drums and Percussion” Patterns
• XF Fully Loaded Instructional Video, discount coupons for KARMA Motif, XF Tools and more.

The company says the value of the hardware and software freebies in the anniversary pack is over $800. For more information on the Motif XF promotion, good through the end of August, check out the Yamaha site.