[alsa-devel] How to build alsa-driver ?

[Happy]

Dear ALSA developers,

I am trying to get into ALSA development. I need some help.

I checked out to the head of the alsa-driver mirror branch (latest
update 9 days ago).

I made some changes to the usb/mixer_scarlett.c file. (just to test,
change the text of the output channels only for the 18i20)

Questions:

How can I build this?
How can I and update (Ubuntu 15.04) with this new build to this change?

Thank you very much!

Martin