java.lang.NoSuchMethodError: ic2.core.audio.AudioManager.playOnce(Ljava/lang/Object;Lic2/core/audio/PositionSpec;Ljava/lang/String;ZF)V
	at com.chocohead.gravisuite.items.ItemGraviTool.func_77659_a(ItemGraviTool.java:181) ~[ItemGraviTool.class:?]
	at net.minecraft.item.ItemStack.func_77957_a(ItemStack.java:217) ~[aip.class:?]
	at net.minecraft.client.multiplayer.PlayerControllerMP.func_187101_a(PlayerControllerMP.java:511) ~[bsa.class:?]
	at net.optifine.override.PlayerControllerOF.func_187101_a(PlayerControllerOF.java:80) ~[PlayerControllerOF.class:?]
	at net.minecraft.client.Minecraft.func_147121_ag(Minecraft.java:1597) ~[bib.class:?]
	at net.minecraft.client.Minecraft.func_184117_aA(Minecraft.java:2254) ~[bib.class:?]
	at net.minecraft.client.Minecraft.func_184118_az(Minecraft.java:2020) ~[bib.class:?]
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1808) ~[bib.class:?]
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1098) ~[bib.class:?]
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398) [bib.class:?]
	at net.minecraft.client.main.Main.main(SourceFile:123) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_191]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_191]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_191]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_191]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]