About This File
An expansion pack of 50+ Rhythms made specifically for the Casio CDP-S350. The S350 is built on the same AiX sound source as the CT-X series, and shares all of its pre-set rhythms with the the entry-level CT-X700 and X800 models in that product line. I took all the exclusive Rhythms from the higher-end CT-X3000 and X5000 and personally converted them to use the CDP-S350's voice assignments to ensure maximum compatibility. These Rhythms will still work with other models that accept .AC7 format Rhythms, but the differences in voice assignments may result in some strange instrumentation on non AiX keyboards. If your keyboard has access to an onboard Rhythm Editor, you can change the voices assigned to each track as needed.
Any CT-X3000/X5000 exclusive tones found in these Rhythms were changed to closest thing I could find on the CDP-S350, and all General MIDI tones in the original Rhythms were swapped out for their higher-quality equivalents whenever possible. As a result, some of these S350 Rhythms might even sound better than they do on the X3000/X5000, but they only have two variations to work with instead of the X3000's 4 Variations. When deciding on which variations to keep during the conversion process, I tried to make Variation 1 ("Normal" on the S350) whichever pattern sounded closest to the Intro pattern and Variation 2 ("VAR" on the S350) whichever pattern sounded as close as possible to the Ending pattern.
You can use a USB flash drive for the transfer. Just make sure that the .AC7 Rhythm files are placed inside the MUSICDAT folder on the root of your flash drive so that the S350 can recognize them properly. Enjoy! 
