Sound Test/Sound Library

Just as the title says. There should be a Sound Test/Library located in the sound settings for Minecraft.

It could benefit people making custom sounds for their resource packs and playing them back to test them out.

I feel that it could also be used to customize player's experience. Say for example that you specifically dislike when an Enderman is screaming at you, you can find that sound byte in the sound library and disable those sounds specifically. Further, you could allow playing ambient music whenever you want during gameplay (sometimes creative mode music would be cool to listen to in survival) (music disc tracks wouldn't be included in this as those are in game collectibles.)