What's new in version 1.6 (released on April 13, 2012):
Multitasking - Use the Settings app to turn on the CrystalSynthXT Background Audio mode if you'd like Crystal to play audio when in the background, for example to play from a virtual midi controller app.
Please send any problem reports via email to crystalsynth [at] gmail [dot] com. We cannot reply to problem reports in reviews.
Positive reviews are always welcome and encourage us to provide updates!