# Features
The Rust features for the `jack` crate are defined in
<https://github.com/RustAudio/rust-jack/blob/main/Cargo.toml>. To see the
documentation for Rust features in general, see the [Rust
Book](https://doc.rust-lang.org/cargo/reference/features.html).
## Disabling Default Features
The `jack` crate ships with a reasonable set of default features. To enable just
a subset of features, set `default-features` to false and select only the
desired features.
```toml
jack = { version = "..", default-features = false, features = ["log"] }
```
## `log`
Default: Yes
If the [`log` crate](https://crates.io/crates/log) should be used to handle JACK
logging. Requires setting up a logging implementation to make messages
available.
## `dynamic_loading`
Default: Yes
Load `libjack` at runtime as opposed to the standard dynamic linking. This is
preferred as it allows `pw-jack` to intercept the loading at runtime to provide
the Pipewire JACK server implementation.
## `controller`
Default: No
Enables the `jack::contrib::controller` module which provides utilities for
building controllable JACK processors with lock-free communication. See the
[Controller documentation](contrib/controller.md) for usage details.
