Cargo Features

clitrans = { version = "0.3.5", default-features = false, features = ["full", "audio"] }
default = full

The full feature is set by default whenever clitrans is added without default-features = false somewhere in the dependency tree.

full default = audio
audio full = rodio

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features.

rodio audio?

Enables rodio ^0.13