Ambient sounds add-on is replacing standard Minecraft PE sounds with new ones. Almost every biome received a new ambient sound that fits it. Do not confuse these sounds for the music theme of the game - that's separate entities. This add-on really adds something to the relaxing end of Minecraft. Sometimes I'd find myself standing, doing nothing, and just enjoying the beauties of the game.
Credits: The Big Onion Institute
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How to install addons:
Download the addon straight from your device
Find and open the .mcpack or .mcworld files that you download earlier
Click it to import into Minecraft Pocket Edition
Open the game
Create a new world or edit an existing world
Scroll down to the Add-ons section and select the ones you want to apply
