guga
15
sysex are not that difficult once you get to know them …a bit like 'fill the gap in between f0 and f7 
what you refer to as ‘0n’ is not actually a value you dial in, ‘n’ is a variable you can set, in this case the MIDI channel. that’s true for all the other bytes which have letters in them (looking at manual page 9, 4-14 parameter send)
so for instance, if you wanted to send a sysex message to your kawai on channel 12 to set the cutoff at 50 for single source S1, the message would look something like this: 0xf0 0x40 0x0c 0x10 0x00 0x06 0x23 0x00 0x32 0xf7
Channel no.-> 0x0c (range 0x00 to 0x0f)
Sub status 1 -> 0x23 (decimal 35, range 0-100)
Sub status 2 -> 0x00
data -> 0x32 (decimal 50)
you need to convert the decimal numbers on the manual to hexadecimal ones to get things to work
hope this helps