Pro začátek jsem si stáhl manuál a zajímala mě kompatibilita, K26 ani KRZ tam bohužel marně hledám
:Compatible Files
The PC4 can load its own .PC4 files, as well as file types from other Kurzweil products such
as .SP6, .FSE, .FOR, .ASE, .ART, .P3A, .PC3, .P3K, .PLE, .SPX, and .SYX files. When
loading file types other than .PC4, the PC4 will attempt a conversion of the objects in those
files. The PC4 can often exactly match the sound and function of the original objects. In
some cases object parameters may not be converted and must be adjusted by the user after
conversion (see below for details).
Importing Program
Objects
When importing a Program object from a .P3A, .P3K, .PC3, .PLE, or .SPX file, Parameter
info names and some controller assignments may need to be manually adjusted.
Importing Forte (.FOR) Objects
Some Forte Programs (stored in .FOR files) may not be compatible if they use keymaps and samples that are not available on the PC4. It may be possible to import and edit these Programs on the PC4 and select PC4 keymaps that sound very similar to the incompatible
Forte keymaps. For example, the PC4 does not have the same Japanese Grand Piano keymaps and samples that the Forte has, but it does have similar keymaps that use a reduced set of the Forte Japanese Grand Piano samples.
Importing FM (.SYX) Programs
The PC4 can load .SYX files containing FM programs from classic 6 operator FM
synthesizers.
Jedna věc, proč jsem přestal uvažovat o Kurzweilu bez sequenceru je počet kontrolerů 0-181. Jde vůbec nastavit kontroler 181 v PC , nebo externím sequenceru?
ktora pride na trh koncom decembra. 
