One of the notable key items present in Pokémon Sword and Shield is the Hi-tech Earbuds.
This item allows you to change the volume of the in-game music, the sound effects and the cries of the various Pokémon from the Galar region.
When you arrive in the city of Motostoke, you will find a piston lift that provides a shortcut to the higher buildings.
On the right hand side before you reach this lift, you will find a music shop with a male NPC standing outside. Speak to this man and he will give you the Hi-tech Earbuds.
Whether or not you agree with the idea of providing audio controls via an obtainable item, having the Hi-tech Earbuds in your inventory is an essential acquisition for any trainer beginning their journey in Pokémon Sword and Shield.