Audio channel states visible in debug view + some sound fixes:

- a short "cooldown" after each footstep sound (prevents the sound playing multiple times during one footstep)
- water flow sounds are only played by one of the hulls a gap is between
- flow rate affects the range of the flow sound

Subsurface/Source/Characters/Animation/Ragdoll.cs

@@ -422,7 +422,11 @@ namespace Barotrauma
             float volume = stairs == null ? impact / 5.0f : impact;
             volume = Math.Min(impact, 1.0f);
 
-            if (impact > 0.8f && l.HitSound != null && l.soundTimer <= 0.0f) l.HitSound.Play(volume, impact * 100.0f, l.WorldPosition);
+            if (impact > 0.5f && l.HitSound != null && l.soundTimer <= 0.0f)
+            {
+                l.soundTimer = Limb.SoundInterval;
+                l.HitSound.Play(volume, impact * 250.0f, l.WorldPosition);
+            }
 
             if (impact > l.impactTolerance)
             {