Add some information about sound

doc/formats/index.md

@@ -34,7 +34,7 @@ remake.
             * `PWeight.dat`     # Personality weights for the individual character types
             * `Random_AI.dat`   # contains the percentage of the different AI types for each of the different Chaos Squad Types
             * `RandomPlanets.dat` #  Campaign Primary and Secondary Objectives
-            * `Sounds.dat`      # Sound Effect Data
+            * [`Sounds.dat`](sound.md)      # Sound Effect Data
             * `SpellDef.dat`    # SPELL DEFINITIONS
             * `StdWeap.dat`     # SQUAD STANDARD WEAPONS
             * `Ultnames.dat`    # List of names for ultramarines
@@ -94,10 +94,10 @@ remake.
     * `*.set`
 * [✓] `SMK/`
     * `*.smk` # Videos: RAD Game Tools Smacker Multimedia version 2
-* `Sounds/`
-    * `wh40k.ds` # 0xffffffff then a list of .wav file names. Some sort of index?
-* [✓] `Wav/`
-    * `*.wav`
+* [ ] `Sounds/`
+    * [`wh40k.ds`](sound.md)
+* [ ] `Wav/`
+    * [`*.wav`](sound.md)
 
 Phew.
 
@@ -118,5 +118,5 @@ Phew.
 * [`Maps/*.map`](maps.md):
     * [`Maps/*.txt`](maps.md#associated-txt-file)
     * [`Sets/*.set`](sets.md)
-* [`Sounds/wh40k.ds`](sounds.md)
+* [`Sounds/wh40k.ds`](sound.md)
     * `Wav/*.wav`