The C15's audio engine and user interface are constantly evolving. Here you can download the latest firmware versions for your C15 and documents describing the new functions.
The version of the firmware that is currently running on your C15 can be found in:
Setup > System Info > Software Version
The installer will check if it can update your C15. If you get an error message during the update procedure please contact us.
Before you proceed please read this PDF:
How to Update the C15