diff --git a/crates/tek/src/groovebox.rs b/crates/tek/src/groovebox.rs
index a9bec7c6..86649d19 100644
--- a/crates/tek/src/groovebox.rs
+++ b/crates/tek/src/groovebox.rs
@@ -61,6 +61,7 @@ render!(<Tui>|self:GrooveboxTui|{
     let phrase_w  = if w > 60 { 20 } else if w > 40 { 15 } else { 10 };
     let pool_w    = if self.pool.visible { phrase_w } else { 0 };
     let sampler_w = 11;
+    let note_pt   = self.editor.note_point();
     Fill::wh(lay!([
         &self.size,
         Fill::wh(Align::s(Fixed::h(2, GrooveboxStatus::from(self)))),
@@ -84,11 +85,14 @@ render!(<Tui>|self:GrooveboxTui|{
                             &format!("L/{:>+9.3}", self.sampler.input_meter[0]),
                             &format!("R/{:>+9.3}", self.sampler.input_meter[1]),
                             Fill::wh(col!(note in (self.editor.note_lo().load(Relaxed)..=self.editor.note_hi()).rev() => {
-                                if self.sampler.mapped.contains_key(&u7::from(note as u8)) {
-                                    todo!()
-                                } else {
-                                    Tui::fg(TuiTheme::g(96), format!("{note:3} (none)"))
-                                }
+                                Tui::bg(
+                                    if note == note_pt { TuiTheme::g(64) } else { Color::Reset },
+                                    if let Some(sample) = &self.sampler.mapped[note] {
+                                        todo!()
+                                    } else {
+                                        Tui::fg(TuiTheme::g(160), format!("{note:3} (none)"))
+                                    }
+                                )
                             })),
                         ])), Fill::h(&self.editor))
                     )
@@ -188,6 +192,7 @@ command!(|self:GrooveboxCommand,state:GrooveboxTui|match self {
         }
     },
     Self::Clock(cmd) => cmd.execute(state)?.map(Clock),
+    Self::Sampler(cmd) => cmd.execute(&mut state.sampler)?.map(Sampler),
     Self::Enqueue(phrase) => {
         state.player.enqueue_next(phrase.as_ref());
         None
@@ -195,7 +200,4 @@ command!(|self:GrooveboxCommand,state:GrooveboxTui|match self {
     Self::History(delta) => {
         todo!("undo/redo")
     },
-    Self::Sampler(command) => {
-        todo!("sampler")
-    }
 });
diff --git a/crates/tek/src/sampler.rs b/crates/tek/src/sampler.rs
index 195b3109..d692b955 100644
--- a/crates/tek/src/sampler.rs
+++ b/crates/tek/src/sampler.rs
@@ -38,7 +38,7 @@ pub(crate) use self::sample_import::*;
 pub struct Sampler {
     pub jack:        Arc<RwLock<JackClient>>,
     pub name:        String,
-    pub mapped:      BTreeMap<u7, Arc<RwLock<Sample>>>,
+    pub mapped:      [Option<Arc<RwLock<Sample>>>;128],
     pub unmapped:    Vec<Arc<RwLock<Sample>>>,
     pub voices:      Arc<RwLock<Vec<Voice>>>,
     pub midi_in:     Port<MidiIn>,
@@ -63,7 +63,7 @@ impl Sampler {
             ],
             jack:        jack.clone(),
             name:        name.into(),
-            mapped:      BTreeMap::new(),
+            mapped:      [const { None };128],
             unmapped:    vec![],
             voices:      Arc::new(RwLock::new(vec![])),
             buffer:      vec![vec![0.0;16384];2],
@@ -86,9 +86,9 @@ pub struct SamplerTui {
 impl SamplerTui {
     /// Immutable reference to sample at cursor.
     pub fn sample (&self) -> Option<&Arc<RwLock<Sample>>> {
-        for (i, sample) in self.state.mapped.values().enumerate() {
+        for (i, sample) in self.state.mapped.iter().enumerate() {
             if i == self.cursor.0 {
-                return Some(sample)
+                return sample.as_ref()
             }
         }
         for (i, sample) in self.state.unmapped.iter().enumerate() {
diff --git a/crates/tek/src/sampler/sampler_audio.rs b/crates/tek/src/sampler/sampler_audio.rs
index fac91ba6..8b9ca5e4 100644
--- a/crates/tek/src/sampler/sampler_audio.rs
+++ b/crates/tek/src/sampler/sampler_audio.rs
@@ -37,7 +37,7 @@ impl Sampler {
             if let LiveEvent::Midi {
                 message: MidiMessage::NoteOn { ref key, ref vel }, ..
             } = LiveEvent::parse(bytes).unwrap() {
-                if let Some(sample) = mapped.get(key) {
+                if let Some(ref sample) = mapped[key.as_int() as usize] {
                     voices.write().unwrap().push(Sample::play(sample, time as usize, vel));
                 }
             }
diff --git a/crates/tek/src/sampler/sampler_control.rs b/crates/tek/src/sampler/sampler_control.rs
index 63107481..7963fcad 100644
--- a/crates/tek/src/sampler/sampler_control.rs
+++ b/crates/tek/src/sampler/sampler_control.rs
@@ -1,21 +1,24 @@
 use crate::*;
 use KeyCode::Char;
 
-handle!(<Tui>|self:SamplerTui,input|SamplerCommand::execute_with_state(self, input));
+handle!(<Tui>|self: SamplerTui, input|SamplerTuiCommand::execute_with_state(self, input));
 
-pub enum SamplerCommand {
+pub enum SamplerTuiCommand {
     Import(FileBrowserCommand),
     SelectNote(usize),
     SelectField(usize),
-    SetName(String),
-    SetNote(u7, Option<Arc<RwLock<Sample>>>),
+    Sample(SamplerCommand),
+}
+
+pub enum SamplerCommand {
+    Record(u7),
+    SetSample(u7, Option<Arc<RwLock<Sample>>>),
     SetGain(f32),
     NoteOn(u7, u7),
     NoteOff(u7),
-    Record(u7),
 }
 
-input_to_command!(SamplerCommand: <Tui>|state: SamplerTui, input|match state.mode {
+input_to_command!(SamplerTuiCommand: <Tui>|state: SamplerTui, input|match state.mode {
     Some(SamplerMode::Import(..)) => Self::Import(
         FileBrowserCommand::input_to_command(state, input)?
     ),
@@ -51,7 +54,8 @@ input_to_command!(SamplerCommand: <Tui>|state: SamplerTui, input|match state.mod
         //}
     //}
 });
-command!(|self:SamplerCommand,state:SamplerTui|match self {
+
+command!(|self: SamplerTuiCommand, state: SamplerTui|match self {
     Self::Import(FileBrowserCommand::Begin) => {
         let voices = &state.state.voices;
         let sample = Arc::new(RwLock::new(Sample::new("", 0, 0, vec![])));
@@ -63,10 +67,21 @@ command!(|self:SamplerCommand,state:SamplerTui|match self {
         state.set_note_point(index);
         Some(Self::SelectNote(old))
     },
+    Self::Sample(cmd) => cmd.execute(&mut state.state)?.map(Self::Sample),
+    _ => todo!()
+});
+
+command!(|self: SamplerCommand, state: Sampler|match self {
+    Self::SetSample(index, sample) => {
+        let i = index.as_int() as usize;
+        let old = state.mapped[i].clone();
+        state.mapped[i] = sample;
+        Some(Self::SetSample(index, old))
+    },
     Self::Record(index) => {
-        let old = state.state.mapped.get(&index).cloned();
-        
-        Some(Self::SetNote(index, old))
+        let i = index.as_int() as usize;
+        let old = state.mapped[i].clone();
+        Some(Self::SetSample(index, old))
     },
     _ => todo!()
 });