Cargo Features

[dependencies]
rtaudio-sys = { version = "0.3.3", default-features = false, features = ["alsa", "jack_linux", "oss", "asio", "ds"] }
default = alsa, coreaudio, ds, oss, pulse, wasapi

These default features are set whenever rtaudio-sys is added without default-features = false somewhere in the dependency tree.

coreaudio alsa default
jack_linux
pulse oss default
asio
wasapi ds default

rtaudio-sys has 6 features without comments.