When you start the game it shows the following warnings:
Missing sounds 15w46a
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:block.brewing_stand.brew
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:block.chorus_flower.death
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:block.chorus_flower.grow
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:enchant.thorns.hit
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.guardian.thorns
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.horse.eat
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.crit
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.knockback
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.parry
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.strong
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.sweep
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.weak
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.rabbit.attack
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.shield.block
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker.ambient
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker.close
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker.death
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker.open
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker_bullet.hit
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker_bullet.hurt
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.ambient
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.death
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.drink
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.hurt
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.throw
[17:48:38] [Client thread/WARN]: Missing sound for event: minecraft:entity.zombie.infect
Related issues
is duplicated by
Comments

15w43b still reproduced

Well I've got more missing sound that happen on 15w45a:
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:block.brewing_stand.brew
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:block.chorus_flower.death
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:block.chorus_flower.grow
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:enchant.thorns.hit
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.guardian.thorns
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.horse.eat
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.crit
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.knockback
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.parry
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.strong
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.sweep
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.player.attack.weak
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.rabbit.attack
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.shield.block
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker.ambient
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker.close
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker.death
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker.open
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker_bullet.hit
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.shulker_bullet.hurt
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.ambient
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.death
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.drink
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.hurt
[07:58:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.witch.throw

Shouldn't this be closed and then marked as Fixed when it's done?

The fact that warnings are printed for missing sounds is WAI.

Oh, I see. So the issue being reported here wasn't the missing sounds themselves, but the warnings, which are intended and will be fixed when the sounds get added. Thanks!

The hoe used to have a working sound prior to 15w49 (from "duplicate" MC-93946). Is minecraft:item.hoe.till not playing actually intended?

Well I've got more missing sound that happen on 15w50a:
[11:35:42] [Client thread/WARN]: Missing sound for event: minecraft:entity.snowman.ambient
[11:35:42] [Client thread/WARN]: Missing sound for event: minecraft:item.bottle.fill_dragonbreath

1.10-pre-1
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:block.enchantment_table.use
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.husk.ambient
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.husk.death
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.husk.hurt
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.husk.step
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.polar_bear.ambient
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.polar_bear.baby_ambient
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.polar_bear.death
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.polar_bear.hurt
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.polar_bear.step
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.polar_bear.warning
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.stray.ambient
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.stray.death
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.stray.hurt
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.stray.step
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.wither_skeleton.ambient
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.wither_skeleton.death
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.wither_skeleton.hurt
[15:55:00] [Client thread/WARN]: Missing sound for event: minecraft:entity.wither_skeleton.step
[15:55:00] [Sound Library Loader/INFO]: Starting up SoundSystem...

How can I fix this
Will get sounds later.