Unofficial Aether & Music Choices

[net.minecraft.client.Minecraft:func_71377_b:-1]: ---- Minecraft Crash Report ----
A fatal error occured in SquidAPI. Firstly, make sure that the error was not caused by misuse.
Secondly, read Vazkii's guide on bug reports at http://vazkii.us/br101/.
Finally, report the error to the mod author at http://coolsquidmc.blogspot.no/.

// Uh... Did I do that?

Time: 12/6/15 6:56 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
	at com.tmtravlr.musicchoices.MusicChoicesEventHandler.onSound(MusicChoicesEventHandler.java:34)
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_574_MusicChoicesEventHandler_onSound_PlaySoundEvent17.invoke(.dynamic)
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
	at net.minecraftforge.client.ForgeHooksClient.playSound(ForgeHooksClient.java:466)
	at net.minecraft.client.audio.SoundManager.func_148611_c(SoundManager.java:311)
	at net.minecraft.client.audio.SoundHandler.func_147682_a(SourceFile:154)
	at com.tmtravlr.musicchoices.MusicChoicesMusicTicker.playBackgroundMusic(MusicChoicesMusicTicker.java:489)
	at com.tmtravlr.musicchoices.MusicChoicesMusicTicker.func_73660_a(MusicChoicesMusicTicker.java:187)
	at net.minecraft.client.Minecraft.func_71407_l(Unknown Source)
	at net.minecraft.client.Minecraft.func_71411_J(Unknown Source)
	at net.minecraft.client.Minecraft.func_99999_d(Unknown Source)
	at net.minecraft.client.main.Main.main(SourceFile:148)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:310)
	at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:394)
	at org.multimc.EntryPoint.listen(EntryPoint.java:170)
	at org.multimc.EntryPoint.main(EntryPoint.java:54)