diff --git a/src/core.rs b/src/core.rs
index d23f8834..faa9782a 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -71,6 +71,7 @@ pub use crate::{submod, pubmod, render, handle, process, phrase, keymap, ports};
 // Reexport JACK proto-lib:
 pub use crate::jack::*;
 
+/// Run the main loop.
 pub fn run <T> (state: Arc<RwLock<T>>) -> Usually<Arc<RwLock<T>>>
     where T: Render + Handle + Send + Sync + Sized + 'static
 {
diff --git a/src/jack.rs b/src/jack.rs
index 135698ca..a964937a 100644
--- a/src/jack.rs
+++ b/src/jack.rs
@@ -4,7 +4,7 @@ use crate::core::*;
 
 submod!( device event factory ports );
 
-pub use ::_jack::{
+pub(crate) use ::_jack::{
     AsyncClient,
     AudioIn,
     AudioOut,
@@ -23,15 +23,14 @@ pub use ::_jack::{
     PortFlags,
     PortId,
     PortSpec,
-    ProcessHandler,
     ProcessScope,
     RawMidi,
     Transport,
     TransportState,
-    TransportStatePosition,
     Unowned
 };
 
+/// Wraps [Client] or [DynamicAsyncClient] in place.
 pub enum JackClient {
     Inactive(Client),
     Active(DynamicAsyncClient),
diff --git a/src/jack/device.rs b/src/jack/device.rs
index 426b5616..59a60ed8 100644
--- a/src/jack/device.rs
+++ b/src/jack/device.rs
@@ -1,6 +1,8 @@
+//! Wrap JACK-enabled [Device]s.
+
 use super::*;
 
-/// A Device bound to a JACK client and a set of ports.
+/// A [Device] bound to a JACK client and a set of ports.
 pub struct JackDevice {
     /// The active JACK client of this device.
     pub client: DynamicAsyncClient,
diff --git a/src/jack/event.rs b/src/jack/event.rs
index 2602aa79..00c5b976 100644
--- a/src/jack/event.rs
+++ b/src/jack/event.rs
@@ -1,9 +1,14 @@
+//! JACK event handling.
+
 use super::*;
 
+/// Notification handler used by the [Jack] factory
+/// when constructing [JackDevice]s.
 pub type DynamicNotifications =
     Notifications<Box<dyn Fn(AppEvent) + Send + Sync>>;
 
 #[derive(Debug)]
+/// Event enum for JACK events in [AppEvent].
 pub enum JackEvent {
     ThreadInit,
     Shutdown(ClientStatus, String),
@@ -17,6 +22,7 @@ pub enum JackEvent {
     XRun,
 }
 
+/// Generic notification handler that emits [AppEvent]::Jack([JackEvent])s.
 pub struct Notifications<T: Fn(AppEvent) + Send>(pub T);
 
 impl<T: Fn(AppEvent) + Send> NotificationHandler for Notifications<T> {
diff --git a/src/jack/factory.rs b/src/jack/factory.rs
index 3c2d5ec5..3a66913f 100644
--- a/src/jack/factory.rs
+++ b/src/jack/factory.rs
@@ -1,3 +1,4 @@
+//! Encapsulate and run [Device]s as [JackDevice]s.
 use super::*;
 
 /// `JackDevice` factory. Creates JACK `Client`s, performs port registration
diff --git a/src/jack/ports.rs b/src/jack/ports.rs
index a9b122aa..7404d09d 100644
--- a/src/jack/ports.rs
+++ b/src/jack/ports.rs
@@ -1,6 +1,8 @@
+//! Handling JACK ports.
 use super::*;
 
 #[derive(Default)]
+/// Collection of JACK ports as [AudioIn]/[AudioOut]/[MidiIn]/[MidiOut].
 pub struct JackPorts {
     pub audio_ins:  BTreeMap<String, Port<AudioIn>>,
     pub midi_ins:   BTreeMap<String, Port<MidiIn>>,
@@ -9,11 +11,12 @@ pub struct JackPorts {
 }
 
 #[derive(Default)]
+/// Collection of JACK ports as [Unowned].
 pub struct UnownedJackPorts {
-    pub audio_ins:  BTreeMap<String, Port<::jack::Unowned>>,
-    pub midi_ins:   BTreeMap<String, Port<::jack::Unowned>>,
-    pub audio_outs: BTreeMap<String, Port<::jack::Unowned>>,
-    pub midi_outs:  BTreeMap<String, Port<::jack::Unowned>>,
+    pub audio_ins:  BTreeMap<String, Port<Unowned>>,
+    pub midi_ins:   BTreeMap<String, Port<Unowned>>,
+    pub audio_outs: BTreeMap<String, Port<Unowned>>,
+    pub midi_outs:  BTreeMap<String, Port<Unowned>>,
 }
 
 impl JackPorts {
diff --git a/src/model/transport.rs b/src/model/transport.rs
index 2fa89ae8..3bc43182 100644
--- a/src/model/transport.rs
+++ b/src/model/transport.rs
@@ -21,7 +21,7 @@ impl TransportFocus {
     }
 }
 
-/// Stored and displays time-related state.
+/// Stores and displays time-related state.
 pub struct TransportToolbar {
     /// Enable metronome?
     pub metronome: bool,