It offers abundant modulation control with over 90 parameters which may be modulated, multi-stage envelopes with graphical editors, extensive tempo sync of envelopes/lforates/delay times, built-in effects for chorus/flanging/comb filtering/echoes, and a band splitter for effects processing by frequency band. Not only that, Crystal has wave sequencing, granular synthesis, program morphing, MIDI learn, and imports soundfonts. The musical applications for Crystal are literally boundless.

New Features in Version 2.4 :

  • 20 Megabyte sample ROM
  • Soundfont management enhancements
  • Patch export
  • Enhanced Audio Unit host compatibility
  • more...

And, yes : Crystal is free...