Speeding playback up/down without affecting pitch

[guysion]

Hi
 
I am using the rockbox on my iAudio (X5L) and as a musician I am looking for the option to slow down the tempo (speed) of a tune without changing the pitch. I found this thread in the developers section which is exactly what I need. Only problem is that I don't know how to install that patch (*.patch or *.diff). I don't have any programing knowledge and I think it's not something they have already in the new build of the rockbox (I installed the last build last night).
 
here is the developers thread link:
(FS#8894 - Speeding playback up/down without affecting pitch):
http://www.rockbox.org/tracker/task/8894?histring=x5&pagenum=2
 
can anyone help?
thanks
Guy

[AlexP]

A patch changes the source code, after which you need to compile the source code into a build.  I'm assuming you are using windows, so you can start by looking at:

www.rockbox.org/wiki/SimpleGuideToCompiling

[Strife89]

Unless the patch gets committed, you will have to set up a build environment and apply it yourself. Be aware that setting it up is a time-consuming process, and can take up about half a gigabyte or so of disk space, so I recommend you only do it if you're willing to put some time into it afterwards.

[guysion]

will i need to compile it every time I an updating my build?

[Chronon]

Yes.  You will have to compile your own build with the patch applied each time.