Because implementing the ability for users to add their own sound effects is difficult, resource packs are used as a workaround.
This guide assumes you already know how to put together a resource pack.
Otherwise, see the wiki page[terraria.wiki.gg] or the forum guide[forums.terraria.org]

Currently, this mod uses
Bell - Item_35 (Replace this one)
Heartbeat - deerclops_step
Mana Chirp - MaxMana
Click - Drip_1

For best results, get a sound effect that only loops once. Bell example[terraria.wiki.gg]

After finding a sound you want and inserting it into the resource pack, your files should be similar to this.







After creating the resource pack, switch to "Bell (No Pitch)" in the config. This ensures that the custom sound play as is without the applied pitch shift the other option has.
Since this is a resource pack, using the bell item will also play the custom sound effect. This is an unavoidable side effect of replacing vanilla sounds. On their own, resource packs cannot replace modded assets. You need another mod to add that compatibility.