Leonardo keyboard leds emulation?

Hi guys,

Could anyone explain how to install the "The LED patch by hartmut_holzgraefe"

I am not familiar with .diff patchs , but I guess I would need the original to see the difference to alter the files

or could someone post their patched USAPI.h and HID.cpp ?

I have been looking for an example all night :~, so I could modify it to show a "MUTE" LED

http://www.usb.org/developers/devclass_docs/Hut1_12v2.pdf


Page 61

section 11 LEDPAGE(0x08)
09 Mute LED

Thanks in advance

Rupert