diff --git a/crates/tek_api/src/api.rs b/crates/tek_api/src/api.rs
deleted file mode 100644
index e69de29b..00000000
diff --git a/crates/tek_api/src/arrange.rs b/crates/tek_api/src/arrange.rs
index 50ac4684..1bed1b40 100644
--- a/crates/tek_api/src/arrange.rs
+++ b/crates/tek_api/src/arrange.rs
@@ -1,4 +1,4 @@
-use scene::*;
+use crate::*;
 
 pub struct Arrangement {
     /// JACK client handle (needs to not be dropped for standalone mode to work).
@@ -56,8 +56,8 @@ pub enum ArrangementCommand {
     Go(Direction),
     Edit(Option<Arc<RwLock<Phrase>>>),
     Scene(SceneCommand),
-    Track(TrackCommand),
-    Clip(ClipCommand),
+    Track(ArrangementTrackCommand),
+    Clip(ArrangementClipCommand),
 }
 
 #[derive(Clone)]
diff --git a/crates/tek_api/src/lib.rs b/crates/tek_api/src/lib.rs
index 9a635c52..464637bc 100644
--- a/crates/tek_api/src/lib.rs
+++ b/crates/tek_api/src/lib.rs
@@ -1,4 +1,4 @@
-pub(crate) use tek_core::*;
+pub use tek_core::*;
 pub(crate) use tek_core::midly::{*, live::LiveEvent, num::u7};
 pub(crate) use std::thread::JoinHandle;
 pub(crate) use std::fmt::{Debug, Formatter, Error};
@@ -9,6 +9,8 @@ pub(crate) use tek_core::jack::{
 };
 
 submod! {
+    api_jack
+    arrange
     clock
     mixer
     phrase
@@ -16,14 +18,13 @@ submod! {
     plugin_kind
     plugin_lv2
     pool
-    sampler
     sample
-    scene     scene_cmd
+    sampler
+    scene
+    scene_cmd
     sequencer
     track
-    transport transport_cmd
+    transport
+    transport_cmd
     voice
-
-    api_cmd
-    api_jack
 }
diff --git a/crates/tek_api/src/transport.rs b/crates/tek_api/src/transport.rs
index 73372d7a..080c3ab4 100644
--- a/crates/tek_api/src/transport.rs
+++ b/crates/tek_api/src/transport.rs
@@ -10,6 +10,17 @@ pub struct Transport {
     pub metronome: bool,
 }
 
+impl Debug for Transport {
+    fn fmt (&self, f: &mut Formatter<'_>) -> std::result::Result<(), Error> {
+        f.debug_struct("transport")
+            .field("jack",      &self.jack)
+            .field("transport", &"(JACK transport)")
+            .field("clock",     &self.clock)
+            .field("metronome", &self.metronome)
+            .finish()
+    }
+}
+
 impl Audio for Transport {
     fn process (&mut self, _: &Client, scope: &ProcessScope) -> Control {
         let times       = scope.cycle_times().unwrap();
@@ -41,3 +52,22 @@ impl Audio for Transport {
         Control::Continue
     }
 }
+
+impl Transport {
+    pub fn toggle_play (&mut self) -> Usually<()> {
+        let playing = self.clock.playing.read().unwrap().expect("1st sample has not been processed yet");
+        let playing = match playing {
+            TransportState::Stopped => {
+                self.transport.start()?;
+                Some(TransportState::Starting)
+            },
+            _ => {
+                self.transport.stop()?;
+                self.transport.locate(0)?;
+                Some(TransportState::Stopped)
+            },
+        };
+        *self.clock.playing.write().unwrap() = playing;
+        Ok(())
+    }
+}
diff --git a/crates/tek_cli/src/cli_arranger.rs b/crates/tek_cli/src/cli_arranger.rs
index 340741ca..c69c6b08 100644
--- a/crates/tek_cli/src/cli_arranger.rs
+++ b/crates/tek_cli/src/cli_arranger.rs
@@ -20,7 +20,7 @@ impl ArrangerCli {
     /// Run the arranger TUI from CLI arguments.
     fn run (&self) -> Usually<()> {
         Tui::run(JackClient::new("tek_arranger")?.activate_with(|jack|{
-            let transport       = TransportToolbar::new(jack, None);
+            let transport       = TransportView::new(jack, None);
             let phrases         = Arc::new(RwLock::new(PhrasePool::new()));
             let mut arrangement = Arrangement::new(&jack, &transport.clock, "", &phrases);
             let transport       = Arc::new(RwLock::new(transport));
@@ -43,7 +43,7 @@ impl ArrangerCli {
                     Some(scene_color_1.mix(scene_color_2, i as f32 / self.scenes as f32))
                 )?;
             }
-            Ok(ArrangerApp::new(
+            Ok(ArrangerView::new(
                 jack,
                 self.transport.then_some(transport),
                 arrangement,
diff --git a/crates/tek_cli/src/cli_sequencer.rs b/crates/tek_cli/src/cli_sequencer.rs
index cae72eba..2fef53e3 100644
--- a/crates/tek_cli/src/cli_sequencer.rs
+++ b/crates/tek_cli/src/cli_sequencer.rs
@@ -19,7 +19,7 @@ pub struct SequencerCli {
 impl SequencerCli {
     fn run (&self) -> Usually<()> {
         Tui::run(JackClient::new("tek_sequencer")?.activate_with(|jack|{
-            let transport = TransportToolbar::new(jack, None);
+            let transport = TransportView::new(jack, None);
             if let Some(_) = self.name.as_ref() {
                 // TODO: sequencer.name = Arc::new(RwLock::new(name.clone()));
             }
@@ -31,7 +31,7 @@ impl SequencerCli {
                     //phrase.write().unwrap().length = length;
                 //}
             }
-            Ok(SequencerApp {
+            Ok(SequencerView {
                 jack:         jack.clone(),
                 focus_cursor: (1, 1),
                 entered:      false,
diff --git a/crates/tek_cli/src/cli_transport.rs b/crates/tek_cli/src/cli_transport.rs
index 4ebde7b2..6296156b 100644
--- a/crates/tek_cli/src/cli_transport.rs
+++ b/crates/tek_cli/src/cli_transport.rs
@@ -2,7 +2,7 @@ include!("lib.rs");
 /// Application entrypoint.
 pub fn main () -> Usually<()> {
     Tui::run(JackClient::new("tek_transport")?.activate_with(|jack|{
-        let mut transport = TransportToolbarView::new(jack, None);
+        let mut transport = TransportView::new(jack, None);
         transport.focused = true;
         Ok(transport)
     })?)?;
diff --git a/crates/tek_tui/src/lib.rs b/crates/tek_tui/src/lib.rs
index 6f7e3b63..c281d39f 100644
--- a/crates/tek_tui/src/lib.rs
+++ b/crates/tek_tui/src/lib.rs
@@ -1,4 +1,4 @@
-pub(crate) use tek_core::*;
+pub(crate) use tek_api::*;
 pub(crate) use tek_core::crossterm::event::{KeyCode, KeyModifiers};
 pub(crate) use tek_core::midly::{num::u7, live::LiveEvent, MidiMessage};
 pub(crate) use tek_core::jack::*;
@@ -10,6 +10,7 @@ pub(crate) use std::ffi::OsString;
 pub(crate) use std::fs::read_dir;
 
 submod! {
+    tui_app
     tui_arrangement
     tui_arranger
     tui_arranger_bar
@@ -37,5 +38,6 @@ submod! {
     tui_sequencer_cmd
     tui_sequencer_foc
     tui_transport
+    tui_transport_bar
     tui_transport_cmd
 }
diff --git a/crates/tek_tui/src/tui_app.rs b/crates/tek_tui/src/tui_app.rs
new file mode 100644
index 00000000..24e54882
--- /dev/null
+++ b/crates/tek_tui/src/tui_app.rs
@@ -0,0 +1,39 @@
+use crate::*;
+
+pub struct App<E, T, C, S>
+where
+    E: Engine,
+    T: Widget<Engine = E> + Handle<E> + Audio,
+    C: Command<T>,
+    S: Widget<Engine = E>
+{
+    state:      T,
+    cursor:     (usize, usize),
+    entered:    bool,
+    menu_bar:   Option<MenuBar<E, T, C>>,
+    status_bar: Option<S>
+    history:    Vec<C>,
+    size:       Measure<E>,
+}
+
+impl App<Tui, TransportView<Tui>, TransportViewCommand, TransportStatusBar> {
+    fn new () -> Self {
+        Self {
+            state: TransportView {
+                _engine:      Default::default(),
+                state: Transport {
+                    jack:      Default::default(),
+                    transport: Default::default(),
+                    clock:     Default::default(),
+                    metronome: false
+                }
+            },
+            cursor:      (0, 0),
+            entered:     false,
+            menu_bar:    None,
+            status_bar:  None,
+            history:     vec![],
+            size:        Default::default(),
+        }
+    }
+}
diff --git a/crates/tek_tui/src/tui_arrangement.rs b/crates/tek_tui/src/tui_arrangement.rs
index b80dde10..80f792e2 100644
--- a/crates/tek_tui/src/tui_arrangement.rs
+++ b/crates/tek_tui/src/tui_arrangement.rs
@@ -4,7 +4,7 @@ pub struct ArrangementEditor<E: Engine> {
     /// Global JACK client
     pub jack:     Arc<RwLock<JackClient>>,
     /// Global timebase
-    pub clock:    Arc<TransportTime>,
+    pub clock:    Arc<Clock>,
     /// Name of arranger
     pub name:     Arc<RwLock<String>>,
     /// Collection of phrases.
diff --git a/crates/tek_tui/src/tui_arranger.rs b/crates/tek_tui/src/tui_arranger.rs
index c01bfff3..0f1ce93d 100644
--- a/crates/tek_tui/src/tui_arranger.rs
+++ b/crates/tek_tui/src/tui_arranger.rs
@@ -1,38 +1,28 @@
 use crate::*;
 
 /// Root level object for standalone `tek_arranger`
-pub struct ArrangerApp<E: Engine> {
-    /// JACK client handle (needs to not be dropped for standalone mode to work).
-    pub jack:              Arc<RwLock<JackClient>>,
-    /// Which view is focused
-    pub focus_cursor:      (usize, usize),
-    /// Whether the focused view is entered
-    pub entered:           bool,
-    /// Controls the JACK transport.
-    pub transport:         Option<Arc<RwLock<TransportToolbar<E>>>>,
-    /// Global timebase
-    pub clock:             Arc<TransportTime>,
+pub struct ArrangerView<E: Engine> {
+    /// Sequencer component
+    pub sequencer:   SequencerView<E>,
     /// Contains all the sequencers.
-    pub arrangement:       ArrangementEditor<E>,
-    /// Pool of all phrases in the arrangement
-    pub phrases:           Arc<RwLock<PhrasePool<E>>>,
-    /// Phrase editor view
-    pub editor:            PhraseEditor<E>,
+    pub arrangement: ArrangementEditor<E>,
     /// Status bar
-    pub status:            ArrangerStatusBar,
+    pub status:      ArrangerStatusBar,
     /// Height of arrangement
-    pub arrangement_split: u16,
-    /// Width of phrase pool
-    pub phrases_split:     u16,
+    pub split:       u16,
     /// Width and height of app at last render
-    pub size:              Measure<E>,
+    pub size:        Measure<E>,
     /// Menu bar
-    pub menu:              MenuBar<E, Self, ArrangerAppCommand>,
+    pub menu:        MenuBar<E, Self, ArrangerViewCommand>,
     /// Command history
-    pub history:           Vec<ArrangerAppCommand>,
+    pub history:     Vec<ArrangerViewCommand>,
+    /// Which view is focused
+    pub cursor:      (usize, usize),
+    /// Whether the focused view is entered
+    pub entered:     bool,
 }
 
-impl<E: Engine> Audio for ArrangerApp<E> {
+impl<E: Engine> Audio for ArrangerView<E> {
     fn process (&mut self, client: &Client, scope: &ProcessScope) -> Control {
         if let Some(ref transport) = self.transport {
             transport.write().unwrap().process(client, scope);
@@ -63,7 +53,7 @@ impl<E: Engine> Audio for ArrangerApp<E> {
 }
 
 /// Layout for standalone arranger app.
-impl Content for ArrangerApp<Tui> {
+impl Content for ArrangerView<Tui> {
     type Engine = Tui;
     fn content (&self) -> impl Widget<Engine = Tui> {
         let focused   = self.arrangement.focused;
@@ -103,7 +93,7 @@ impl Content for ArrangerApp<Tui> {
 }
 
 /// General methods for arranger
-impl<E: Engine> ArrangerApp<E> {
+impl<E: Engine> ArrangerView<E> {
     pub fn new (
         jack:        &Arc<RwLock<JackClient>>,
         transport:   Option<Arc<RwLock<TransportToolbar<E>>>>,
@@ -126,10 +116,10 @@ impl<E: Engine> ArrangerApp<E> {
             clock: if let Some(ref transport) = transport {
                 transport.read().unwrap().clock.clone()
             } else {
-                Arc::new(TransportTime::default())
+                Arc::new(Clock::default())
             },
             menu: {
-                use ArrangerAppCommand::*;
+                use ArrangerViewCommand::*;
                 MenuBar::new()
                     .add({
                         use ArrangementCommand::*;
@@ -139,7 +129,7 @@ impl<E: Engine> ArrangerApp<E> {
                             .cmd("s", "Save project",      Arrangement(Save))
                     })
                     .add({
-                        use TransportAppCommand::*;
+                        use TransportViewCommand::*;
                         Menu::new("Transport")
                             .cmd("p", "Play",              Transport(Play))
                             .cmd("s", "Play from start",   Transport(PlayFromStart))
@@ -188,7 +178,7 @@ impl<E: Engine> ArrangerApp<E> {
 
     //pub fn new (
         //jack:    &Arc<RwLock<JackClient>>,
-        //clock:   &Arc<TransportTime>,
+        //clock:   &Arc<Clock>,
         //name:    &str,
         //phrases: &Arc<RwLock<PhrasePool<E>>>
     //) -> Self {
@@ -234,7 +224,7 @@ impl<E: Engine> ArrangerApp<E> {
             self.arrangement.phrase_put();
         }
         self.show_phrase();
-        self.focus(ArrangerAppFocus::PhraseEditor);
+        self.focus(ArrangerViewFocus::PhraseEditor);
         self.editor.entered = true;
     }
     /// Rename the selected track, scene, or clip
@@ -247,7 +237,7 @@ impl<E: Engine> ArrangerApp<E> {
             ArrangementEditorFocus::Clip(t, s) => if let Some(ref phrase) = scenes[s].clips[t] {
                 let index = self.phrases.read().unwrap().index_of(&*phrase.read().unwrap());
                 if let Some(index) = index {
-                    self.focus(ArrangerAppFocus::PhrasePool);
+                    self.focus(ArrangerViewFocus::PhrasePool);
                     self.phrases.write().unwrap().phrase = index;
                     self.phrases.write().unwrap().begin_rename();
                 }
@@ -257,15 +247,15 @@ impl<E: Engine> ArrangerApp<E> {
     /// Update status bar
     pub fn update_status (&mut self) {
         self.status = match self.focused() {
-            ArrangerAppFocus::Transport         => ArrangerStatusBar::Transport,
-            ArrangerAppFocus::Arrangement       => match self.arrangement.selected {
+            ArrangerViewFocus::Transport         => ArrangerStatusBar::Transport,
+            ArrangerViewFocus::Arrangement       => match self.arrangement.selected {
                 ArrangementEditorFocus::Mix        => ArrangerStatusBar::ArrangementMix,
                 ArrangementEditorFocus::Track(_)   => ArrangerStatusBar::ArrangementTrack,
                 ArrangementEditorFocus::Scene(_)   => ArrangerStatusBar::ArrangementScene,
                 ArrangementEditorFocus::Clip(_, _) => ArrangerStatusBar::ArrangementClip,
             },
-            ArrangerAppFocus::PhrasePool        => ArrangerStatusBar::PhrasePool,
-            ArrangerAppFocus::PhraseEditor      => match self.editor.entered {
+            ArrangerViewFocus::PhrasePool        => ArrangerStatusBar::PhrasePool,
+            ArrangerViewFocus::PhraseEditor      => match self.editor.entered {
                 true  => ArrangerStatusBar::PhraseEdit,
                 false => ArrangerStatusBar::PhraseView,
             },
@@ -563,7 +553,7 @@ impl<E: Engine> Arrangement<E> {
 impl ArrangementTrack {
     pub fn new (
         jack:  &Arc<RwLock<JackClient>>,
-        clock: &Arc<TransportTime>,
+        clock: &Arc<Clock>,
         name:  &str,
         color: Option<ItemColor>
     ) -> Usually<Self> {
diff --git a/crates/tek_tui/src/tui_arranger_cmd.rs b/crates/tek_tui/src/tui_arranger_cmd.rs
index bc9b1910..ab90ee65 100644
--- a/crates/tek_tui/src/tui_arranger_cmd.rs
+++ b/crates/tek_tui/src/tui_arranger_cmd.rs
@@ -1,7 +1,7 @@
 use crate::*;
 
 #[derive(Clone)]
-pub enum ArrangerAppCommand {
+pub enum ArrangerViewCommand {
     Focus(FocusCommand),
     Transport(TransportCommand),
     Phrases(PhrasePoolCommand),
@@ -11,10 +11,10 @@ pub enum ArrangerAppCommand {
 }
 
 /// Handle top-level events in standalone arranger.
-impl Handle<Tui> for ArrangerApp<Tui> {
+impl Handle<Tui> for ArrangerView<Tui> {
     fn handle (&mut self, i: &TuiInput) -> Perhaps<bool> {
         if let Some(entered) = self.entered() {
-            use ArrangerAppFocus::*;
+            use ArrangerViewFocus::*;
             if let Some(true) = match entered {
                 Transport    => self.transport.as_mut().map(|t|t.handle(i)).transpose()?.flatten(),
                 Arrangement  => self.arrangement.handle(i)?,
@@ -24,14 +24,14 @@ impl Handle<Tui> for ArrangerApp<Tui> {
                 return Ok(Some(true))
             }
         }
-        ArrangerAppCommand::execute_with_state(self, i)
+        ArrangerViewCommand::execute_with_state(self, i)
     }
 }
 
-impl InputToCommand<Tui, ArrangerApp<Tui>> for ArrangerAppCommand {
-    fn input_to_command (state: &ArrangerApp<Tui>, input: &TuiInput) -> Option<Self> {
+impl InputToCommand<Tui, ArrangerView<Tui>> for ArrangerViewCommand {
+    fn input_to_command (state: &ArrangerView<Tui>, input: &TuiInput) -> Option<Self> {
         use FocusCommand::*;
-        use ArrangerAppCommand::*;
+        use ArrangerViewCommand::*;
         match input.event() {
             key!(KeyCode::Tab)           => Some(Focus(Next)),
             key!(Shift-KeyCode::Tab)     => Some(Focus(Prev)),
@@ -45,11 +45,11 @@ impl InputToCommand<Tui, ArrangerApp<Tui>> for ArrangerAppCommand {
             key!(KeyCode::Esc)           => Some(Focus(Exit)),
             key!(KeyCode::Char(' '))     => Some(Transport(TransportCommand::PlayToggle)),
             _ => match state.focused() {
-                ArrangerAppFocus::Transport => state.transport.as_ref()
+                ArrangerViewFocus::Transport => state.transport.as_ref()
                     .map(|t|TransportCommand::input_to_command(&*t.read().unwrap(), input)
                         .map(Transport))
                     .flatten(),
-                ArrangerAppFocus::PhrasePool => {
+                ArrangerViewFocus::PhrasePool => {
                     let phrases = state.phrases.read().unwrap();
                     match input.event() {
                         key!(KeyCode::Char('e')) => Some(EditPhrase(Some(phrases.phrase().clone()))),
@@ -57,10 +57,10 @@ impl InputToCommand<Tui, ArrangerApp<Tui>> for ArrangerAppCommand {
                             .map(Phrases)
                     }
                 },
-                ArrangerAppFocus::PhraseEditor =>
+                ArrangerViewFocus::PhraseEditor =>
                     PhraseEditorCommand::input_to_command(&state.editor, input)
                         .map(Editor),
-                ArrangerAppFocus::Arrangement => match input.event() {
+                ArrangerViewFocus::Arrangement => match input.event() {
                     key!(KeyCode::Char('e')) => Some(EditPhrase(state.arrangement.phrase())),
                     _ => ArrangementCommand::input_to_command(&state.arrangement, &input)
                         .map(Arrangement)
@@ -108,14 +108,14 @@ impl InputToCommand<Tui, Arrangement<Tui>> for ArrangementCommand {
     }
 }
 
-//impl ArrangerApp<Tui> {
+//impl ArrangerView<Tui> {
     ///// Helper for event passthru to focused component
     //fn handle_focused (&mut self, from: &TuiInput) -> Perhaps<bool> {
         //match self.focused() {
-            //ArrangerAppFocus::Transport    => self.transport.handle(from),
-            //ArrangerAppFocus::PhrasePool   => self.handle_pool(from),
-            //ArrangerAppFocus::PhraseEditor => self.editor.handle(from),
-            //ArrangerAppFocus::Arrangement  => self.handle_arrangement(from)
+            //ArrangerViewFocus::Transport    => self.transport.handle(from),
+            //ArrangerViewFocus::PhrasePool   => self.handle_pool(from),
+            //ArrangerViewFocus::PhraseEditor => self.editor.handle(from),
+            //ArrangerViewFocus::Arrangement  => self.handle_arrangement(from)
                 //.and_then(|result|{self.show_phrase();Ok(result)}),
         //}
     //}
@@ -187,8 +187,8 @@ pub enum ArrangementCommand {
     Edit(Option<Arc<RwLock<Phrase>>>),
 }
 
-impl<E: Engine> Command<ArrangerApp<E>> for ArrangerAppCommand {
-    fn execute (self, state: &mut ArrangerApp<E>) -> Perhaps<Self> {
+impl<E: Engine> Command<ArrangerView<E>> for ArrangerViewCommand {
+    fn execute (self, state: &mut ArrangerView<E>) -> Perhaps<Self> {
         let undo = match self {
             Self::Focus(cmd) => {
                 delegate(cmd, Self::Focus,       state)
@@ -209,7 +209,7 @@ impl<E: Engine> Command<ArrangerApp<E>> for ArrangerAppCommand {
             },
             Self::EditPhrase(phrase) => {
                 state.editor.phrase = phrase.clone();
-                state.focus(ArrangerAppFocus::PhraseEditor);
+                state.focus(ArrangerViewFocus::PhraseEditor);
                 state.focus_enter();
                 Ok(None)
             }
diff --git a/crates/tek_tui/src/tui_arranger_foc.rs b/crates/tek_tui/src/tui_arranger_foc.rs
index f8d61baf..a89a7488 100644
--- a/crates/tek_tui/src/tui_arranger_foc.rs
+++ b/crates/tek_tui/src/tui_arranger_foc.rs
@@ -2,7 +2,7 @@ use crate::*;
 
 /// Sections in the arranger app that may be focused
 #[derive(Copy, Clone, PartialEq, Eq)]
-pub enum ArrangerAppFocus {
+pub enum ArrangerViewFocus {
     /// The transport (toolbar) is focused
     Transport,
     /// The arrangement (grid) is focused
@@ -14,15 +14,15 @@ pub enum ArrangerAppFocus {
 }
 
 /// Focus layout of arranger app
-impl<E: Engine> FocusGrid for ArrangerApp<E> {
-    type Item = ArrangerAppFocus;
+impl<E: Engine> FocusGrid for ArrangerView<E> {
+    type Item = ArrangerViewFocus;
     fn cursor (&self) -> (usize, usize) { self.focus_cursor }
     fn cursor_mut (&mut self) -> &mut (usize, usize) { &mut self.focus_cursor }
     fn focus_enter (&mut self) {
         let focused = self.focused();
         if !self.entered {
             self.entered = true;
-            use ArrangerAppFocus::*;
+            use ArrangerViewFocus::*;
             if let Some(transport) = self.transport.as_ref() {
                 //transport.write().unwrap().entered = focused == Transport
             }
@@ -39,15 +39,15 @@ impl<E: Engine> FocusGrid for ArrangerApp<E> {
             self.phrases.write().unwrap().entered = false;
         }
     }
-    fn entered (&self) -> Option<ArrangerAppFocus> {
+    fn entered (&self) -> Option<ArrangerViewFocus> {
         if self.entered {
             Some(self.focused())
         } else {
             None
         }
     }
-    fn layout (&self) -> &[&[ArrangerAppFocus]] {
-        use ArrangerAppFocus::*;
+    fn layout (&self) -> &[&[ArrangerViewFocus]] {
+        use ArrangerViewFocus::*;
         &[
             &[Transport,   Transport],
             &[Arrangement, Arrangement],
@@ -55,7 +55,7 @@ impl<E: Engine> FocusGrid for ArrangerApp<E> {
         ]
     }
     fn update_focus (&mut self) {
-        use ArrangerAppFocus::*;
+        use ArrangerViewFocus::*;
         let focused = self.focused();
         if let Some(transport) = self.transport.as_ref() {
             transport.write().unwrap().focused = focused == Transport
diff --git a/crates/tek_tui/src/tui_sequencer.rs b/crates/tek_tui/src/tui_sequencer.rs
index f61dd966..164db388 100644
--- a/crates/tek_tui/src/tui_sequencer.rs
+++ b/crates/tek_tui/src/tui_sequencer.rs
@@ -2,44 +2,40 @@ use crate::*;
 use std::cmp::PartialEq;
 
 /// Root level object for standalone `tek_sequencer`
-pub struct SequencerApp<E: Engine> {
-    /// JACK client handle (needs to not be dropped for standalone mode to work).
-    pub jack:         Arc<RwLock<JackClient>>,
+pub struct SequencerView<E: Engine> {
     /// Controls the JACK transport.
-    pub transport:    Option<Arc<RwLock<TransportToolbar<E>>>>,
-    /// Global timebase
-    pub clock:        Arc<TransportTime>,
+    pub transport: TransportView<E>,
+    /// Width of phrase pool
+    pub split:     u16,
     /// Pool of all phrases available to the sequencer
-    pub phrases:      Arc<RwLock<PhrasePool<E>>>,
+    pub phrases:   PhrasePoolView<E>,
     /// Phrase editor view
-    pub editor:       PhraseEditor<E>,
+    pub editor:    PhraseEditor<E>,
     /// Phrase player
-    pub player:       PhrasePlayer,
+    pub player:    MIDIPlayer,
     /// Which view is focused
-    pub focus_cursor: (usize, usize),
+    pub cursor:    (usize, usize),
     /// Whether the currently focused item is entered
-    pub entered:      bool,
+    pub entered:   bool,
 }
 
-impl Content for SequencerApp<Tui> {
+/// JACK process callback for sequencer app
+impl<E: Engine> Audio for SequencerView<E> {
+    fn process (&mut self, client: &Client, scope: &ProcessScope) -> Control {
+        self.transport.process(client, scope);
+        self.player.process(client, scope);
+        Control::Continue
+    }
+}
+
+impl Content for SequencerView<Tui> {
     type Engine = Tui;
     fn content (&self) -> impl Widget<Engine = Tui> {
         Stack::down(move|add|{
             add(&self.transport)?;
-            add(&self.phrases.clone()
+            add(&self.phrases
                 .split(Direction::Right, 20, &self.editor as &dyn Widget<Engine = Tui>)
                 .min_y(20))
         })
     }
 }
-
-/// JACK process callback for sequencer app
-impl Audio for SequencerApp {
-    fn process (&mut self, client: &Client, scope: &ProcessScope) -> Control {
-        if let Some(ref transport) = self.transport {
-            transport.write().unwrap().process(client, scope);
-        }
-        self.player.process(client, scope);
-        Control::Continue
-    }
-}
diff --git a/crates/tek_tui/src/tui_sequencer_cmd.rs b/crates/tek_tui/src/tui_sequencer_cmd.rs
index f775e096..2221723b 100644
--- a/crates/tek_tui/src/tui_sequencer_cmd.rs
+++ b/crates/tek_tui/src/tui_sequencer_cmd.rs
@@ -1,14 +1,14 @@
 use crate::*;
 
 #[derive(Clone, PartialEq)]
-pub enum SequencerAppCommand {
+pub enum SequencerViewCommand {
     Focus(FocusCommand),
     Transport(TransportCommand),
     Phrases(PhrasePoolCommand),
     Editor(PhraseEditorCommand),
 }
 
-impl Handle<Tui> for SequencerApp<Tui> {
+impl Handle<Tui> for SequencerView<Tui> {
     fn handle (&mut self, i: &TuiInput) -> Perhaps<bool> {
         if let Some(entered) = self.entered() {
             use SequencerFocus::*;
@@ -28,8 +28,8 @@ impl Handle<Tui> for SequencerApp<Tui> {
     }
 }
 
-impl<E: Engine> Command<SequencerApp<E>> for SequencerAppCommand {
-    fn execute (self, state: &mut SequencerApp<E>) -> Perhaps<Self> {
+impl<E: Engine> Command<SequencerView<E>> for SequencerViewCommand {
+    fn execute (self, state: &mut SequencerView<E>) -> Perhaps<Self> {
         match self {
             Self::Focus(cmd) => {
                 return delegate(cmd, Self::Focus,     state)
@@ -48,9 +48,9 @@ impl<E: Engine> Command<SequencerApp<E>> for SequencerAppCommand {
     }
 }
 
-impl InputToCommand<Tui, SequencerApp<Tui>> for SequencerAppCommand {
-    fn input_to_command (state: &SequencerApp<Tui>, input: &TuiInput) -> Option<Self> {
-        use SequencerAppCommand::*;
+impl InputToCommand<Tui, SequencerView<Tui>> for SequencerViewCommand {
+    fn input_to_command (state: &SequencerView<Tui>, input: &TuiInput) -> Option<Self> {
+        use SequencerViewCommand::*;
         use FocusCommand::*;
         match input.event() {
             key!(KeyCode::Tab)           => Some(Focus(Next)),
@@ -61,10 +61,10 @@ impl InputToCommand<Tui, SequencerApp<Tui>> for SequencerAppCommand {
             key!(KeyCode::Down)          => Some(Focus(Down)),
             key!(KeyCode::Left)          => Some(Focus(Left)),
             key!(KeyCode::Right)         => Some(Focus(Right)),
-            key!(KeyCode::Char(' '))     => Some(Transport(TransportAppCommand::PlayToggle)),
+            key!(KeyCode::Char(' '))     => Some(Transport(TransportViewCommand::PlayToggle)),
             _ => match state.focused() {
                 SequencerFocus::Transport => if let Some(t) = state.transport.as_ref() {
-                    TransportAppCommand::input_to_command(&*t.read().unwrap(), input).map(Transport)
+                    TransportViewCommand::input_to_command(&*t.read().unwrap(), input).map(Transport)
                 } else {
                     None
                 },
diff --git a/crates/tek_tui/src/tui_transport.rs b/crates/tek_tui/src/tui_transport.rs
index 70eaf8de..7e40de48 100644
--- a/crates/tek_tui/src/tui_transport.rs
+++ b/crates/tek_tui/src/tui_transport.rs
@@ -1,28 +1,30 @@
 use crate::*;
+use tek_api::Transport;
+
 /// Stores and displays time-related state.
 #[derive(Debug)]
 pub struct TransportView<E: Engine> {
     _engine: PhantomData<E>,
-    state:   TransportToolbar,
+    state:   Transport,
+    focus:   TransportViewFocus,
     focused: bool,
-    focus:   TransportFocus,
 }
-/// Which item of the transport toolbar is focused
-#[derive(Clone, Copy, PartialEq)]
-pub enum TransportFocus {
-    Bpm,
-    Sync,
-    PlayPause,
-    Clock,
-    Quant,
+
+/// JACK process callback for transport app
+impl<E: Engine> Audio for TransportView<E> {
+    fn process (&mut self, client: &Client, scope: &ProcessScope) -> Control {
+        self.state.process(client, scope);
+        Control::Continue
+    }
 }
+
 impl<E: Engine> TransportView<E> {
-    pub fn new (jack: &Arc<RwLock<JackClient>>, clock: Option<&Arc<TransportTime>>) -> Self {
+    pub fn new (jack: &Arc<RwLock<JackClient>>, clock: Option<&Arc<Clock>>) -> Self {
         Self {
             _engine: Default::default(),
             focused: false,
-            focus:   TransportFocus::PlayPause,
-            state:   TransportToolbar {
+            focus:   TransportViewFocus::PlayPause,
+            state:   Transport {
                 metronome: false,
                 transport: jack.read().unwrap().transport(),
                 jack:      jack.clone(),
@@ -30,7 +32,7 @@ impl<E: Engine> TransportView<E> {
                     Some(clock) => clock.clone(),
                     None => {
                         let timebase = Arc::new(Timebase::default());
-                        Arc::new(TransportTime {
+                        Arc::new(Clock {
                             playing: Some(TransportState::Stopped).into(),
                             quant:   24.into(),
                             sync:    (timebase.ppq.get() * 4.).into(),
@@ -42,48 +44,13 @@ impl<E: Engine> TransportView<E> {
             }
         }
     }
-    pub fn toggle_play (&mut self) -> Usually<()> {
-        let playing = self.clock.playing.read().unwrap().expect("1st sample has not been processed yet");
-        let playing = match playing {
-            TransportState::Stopped => {
-                self.transport.start()?;
-                Some(TransportState::Starting)
-            },
-            _ => {
-                self.transport.stop()?;
-                self.transport.locate(0)?;
-                Some(TransportState::Stopped)
-            },
-        };
-        *self.clock.playing.write().unwrap() = playing;
-        Ok(())
-    }
 }
-impl TransportFocus {
-    pub fn next (&mut self) {
-        *self = match self {
-            Self::PlayPause => Self::Bpm,
-            Self::Bpm       => Self::Quant,
-            Self::Quant     => Self::Sync,
-            Self::Sync      => Self::Clock,
-            Self::Clock     => Self::PlayPause,
-        }
-    }
-    pub fn prev (&mut self) {
-        *self = match self {
-            Self::PlayPause => Self::Clock,
-            Self::Bpm       => Self::PlayPause,
-            Self::Quant     => Self::Bpm,
-            Self::Sync      => Self::Quant,
-            Self::Clock     => Self::Sync,
-        }
-    }
-}
-impl Content for TransportToolbar<Tui> {
+
+impl Content for TransportView<Tui> {
     type Engine = Tui;
     fn content (&self) -> impl Widget<Engine = Tui> {
         lay!(
-            self.focus.wrap(self.focused, TransportToolbarFocus::PlayPause, &Styled(
+            self.focus.wrap(self.focused, TransportViewFocus::PlayPause, &Styled(
                 None,
                 match *self.clock.playing.read().unwrap() {
                     Some(TransportState::Rolling)  => "▶ PLAYING",
@@ -94,19 +61,19 @@ impl Content for TransportToolbar<Tui> {
             ).min_xy(11, 2).push_x(1)).align_x().fill_x(),
 
             row!(
-                self.focus.wrap(self.focused, TransportToolbarFocus::Bpm, &Outset::X(1u16, {
+                self.focus.wrap(self.focused, TransportViewFocus::Bpm, &Outset::X(1u16, {
                     let bpm = self.clock.timebase().bpm.get();
                     row! { "BPM ", format!("{}.{:03}", bpm as usize, (bpm * 1000.0) % 1000.0) }
                 })),
-                //let quant = self.focus.wrap(self.focused, TransportToolbarFocus::Quant, &Outset::X(1u16, row! {
+                //let quant = self.focus.wrap(self.focused, TransportViewFocus::Quant, &Outset::X(1u16, row! {
                     //"QUANT ", ppq_to_name(self.quant as usize)
                 //})),
-                self.focus.wrap(self.focused, TransportToolbarFocus::Sync, &Outset::X(1u16, row! {
+                self.focus.wrap(self.focused, TransportViewFocus::Sync, &Outset::X(1u16, row! {
                     "SYNC ",  pulses_to_name(self.clock.sync.get() as usize)
                 }))
             ).align_w().fill_x(),
 
-            self.focus.wrap(self.focused, TransportToolbarFocus::Clock, &{
+            self.focus.wrap(self.focused, TransportViewFocus::Clock, &{
                 let time1 = self.clock.current.format_beat();
                 let time2 = self.clock.current.usec.format_msu();
                 row!("B" ,time1.as_str(), " T", time2.as_str()).outset_x(1)
@@ -115,13 +82,3 @@ impl Content for TransportToolbar<Tui> {
         ).fill_x().bg(Color::Rgb(40, 50, 30))
     }
 }
-impl TransportToolbarFocus {
-    pub fn wrap <'a, W: Widget<Engine = Tui>> (
-        self, parent_focus: bool, focus: Self, widget: &'a W
-    ) -> impl Widget<Engine = Tui> + 'a {
-        let focused   = parent_focus && focus == self;
-        let corners   = focused.then_some(CORNERS);
-        let highlight = focused.then_some(Background(Color::Rgb(60, 70, 50)));
-        lay!(corners, highlight, *widget)
-    }
-}
diff --git a/crates/tek_api/src/api_cmd.rs b/crates/tek_tui/src/tui_transport_bar.rs
similarity index 100%
rename from crates/tek_api/src/api_cmd.rs
rename to crates/tek_tui/src/tui_transport_bar.rs
diff --git a/crates/tek_tui/src/tui_transport_cmd.rs b/crates/tek_tui/src/tui_transport_cmd.rs
index 997a5a81..49b448c4 100644
--- a/crates/tek_tui/src/tui_transport_cmd.rs
+++ b/crates/tek_tui/src/tui_transport_cmd.rs
@@ -1,15 +1,15 @@
 use crate::*;
 #[derive(Copy, Clone, PartialEq)]
-pub enum TransportAppCommand {
+pub enum TransportViewCommand {
     Focus(FocusCommand),
     Transport(TransportCommand),
 }
 impl Handle<Tui> for TransportView<Tui> {
     fn handle (&mut self, from: &TuiInput) -> Perhaps<bool> {
-        TransportAppCommand::execute_with_state(self, from)
+        TransportViewCommand::execute_with_state(self, from)
     }
 }
-impl InputToCommand<Tui, TransportView<Tui>> for TransportAppCommand {
+impl InputToCommand<Tui, TransportView<Tui>> for TransportViewCommand {
     fn input_to_command (_: &TransportView<Tui>, input: &TuiInput) -> Option<Self> {
         match input.event() {
             key!(KeyCode::Char(' '))       => Some(Self::FocusPrev),
diff --git a/crates/tek_tui/src/tui_transport_foc.rs b/crates/tek_tui/src/tui_transport_foc.rs
new file mode 100644
index 00000000..31e6d6ff
--- /dev/null
+++ b/crates/tek_tui/src/tui_transport_foc.rs
@@ -0,0 +1,40 @@
+use crate::*;
+
+impl TransportViewFocus {
+    pub fn next (&mut self) {
+        *self = match self {
+            Self::PlayPause => Self::Bpm,
+            Self::Bpm       => Self::Quant,
+            Self::Quant     => Self::Sync,
+            Self::Sync      => Self::Clock,
+            Self::Clock     => Self::PlayPause,
+        }
+    }
+    pub fn prev (&mut self) {
+        *self = match self {
+            Self::PlayPause => Self::Clock,
+            Self::Bpm       => Self::PlayPause,
+            Self::Quant     => Self::Bpm,
+            Self::Sync      => Self::Quant,
+            Self::Clock     => Self::Sync,
+        }
+    }
+    pub fn wrap <'a, W: Widget<Engine = Tui>> (
+        self, parent_focus: bool, focus: Self, widget: &'a W
+    ) -> impl Widget<Engine = Tui> + 'a {
+        let focused   = parent_focus && focus == self;
+        let corners   = focused.then_some(CORNERS);
+        let highlight = focused.then_some(Background(Color::Rgb(60, 70, 50)));
+        lay!(corners, highlight, *widget)
+    }
+}
+
+/// Which item of the transport toolbar is focused
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum TransportViewFocus {
+    Bpm,
+    Sync,
+    PlayPause,
+    Clock,
+    Quant,
+}