update readme

readme.md

@@ -20,31 +20,5 @@ The program depends on :
 
 ## Sounds
 
-The original sound files are listed below.
-
-- [Fireplace by inchadney](http://www.freesound.org/people/inchadney/sounds/132534/) (CC0)
-- [Heavy Rain by D W](http://www.freesound.org/people/D%20W/sounds/136971/) (CC BY)
-- [Forest Rain by Corsica_S](http://www.freesound.org/people/Corsica_S/sounds/169031/) (CC BY)
-- [Stream by mystiscool](http://www.freesound.org/people/mystiscool/sounds/7138/) (CC BY)
-- [Thunderstorm by RHumphries](http://www.freesound.org/people/RHumphries/sounds/2523/) (CC BY)
-
-To add new sounds, you just need to create an ogg file of a few
-minutes (preferably less than 5) that loops seamlessly, set the title
-tag correctly, and put it in the `sounds` folder. Creating a seamless
-loop is pretty easy with natural sounds, I personally use
-[audacity](http://audacity.sourceforge.net/), with
-[this method](http://manual.audacityteam.org/o/man/tutorial_looping.html)
-to extract a segment that loops without clicking, or
-[this one](http://www.wearytaffer.com/tutorials/tut_loops.html) to
-fade the beginning and the end of the track. You can also modify the
-tags when you export an ogg file with audacity.
-
-If you want me to add your sound to the program, you can make a pull
-request or open an issue. This program is a free software, and will
-only contain free sounds, with licenses such as CC0, CC BY, CC BY-SA
-(and not CC BY-NC or CC BY-ND).
-
-## TODO
-
-- Add new sounds
-- Save and load presets
+The sound files, as well as their licenses and author are available in
+the [ambientsounds](https://github.com/Muges/ambientsounds) repository.