Improve audio effects handling and update spell sound filter type

lib/audio.lua

@@ -1,6 +1,8 @@
 local ease = require "lib.utils.easing"
 local AnimationNode = require "lib.animation_node"
 
+local EFFECTS_SUPPORTED = love.audio.isEffectsSupported()
+
 --- @alias SourceFilter { type: "bandpass"|"highpass"|"lowpass", volume: number, highgain: number, lowgain: number }
 
 --- @class Audio
@@ -62,19 +64,20 @@ end
 --- @param settings SourceFilter?
 --- @param effectName string?
 function audio:play(source, settings, effectName)
-    if settings then
-        source:setFilter(settings)
-    end
-    if effectName then
-        source:setEffect(effectName, true)
-    end
     if source:getType() == "stream" then
         source:setLooping(self.looped)
         source:setVolume(self.musicVolume)
-        return source:play()
+        source:play()
+    else
+        source:setVolume(self.soundVolume)
+        source:play()
+    end
+    if settings and EFFECTS_SUPPORTED then
+        source.setFilter(source, settings)
+    end
+    if effectName and EFFECTS_SUPPORTED then
+        source:setEffect(effectName, true)
     end
-    source:setVolume(self.soundVolume)
-    return source:play()
 end
 
 function audio:setMusicVolume(volume)

lib/spellbook.lua

@@ -172,9 +172,8 @@ function attack:cast(caster, target)
                             targetSprite:animate("hurt", node)
                             --- @type SourceFilter
                             local settings = {
-                                type = "bandpass",
+                                type = "highpass",
                                 volume = 1,
-                                highgain = 0.1,
                                 lowgain = 0.1
                             }
                             Tree.audio:play(audioPath.sounds.hurt, settings)