diff --git a/crates/tek_core/src/time.rs b/crates/tek_core/src/time.rs
index 3c751210..65d64d0b 100644
--- a/crates/tek_core/src/time.rs
+++ b/crates/tek_core/src/time.rs
@@ -79,6 +79,14 @@ impl Timebase {
 }
 impl Default for Timebase { fn default () -> Self { Self::new(48000f64, 150f64, 96f64) } }
 impl Instant {
+    pub fn zero (timebase: &Arc<Timebase>) -> Self {
+        Self {
+            usec:     0.into(),
+            sample:   0.into(),
+            pulse:    0.into(),
+            timebase: timebase.clone(),
+        }
+    }
     pub fn from_usec (timebase: &Arc<Timebase>, usec: f64) -> Self {
         Self {
             usec:     usec.into(),
diff --git a/crates/tek_sequencer/src/sequencer.rs b/crates/tek_sequencer/src/sequencer.rs
index b5baed4c..52af81db 100644
--- a/crates/tek_sequencer/src/sequencer.rs
+++ b/crates/tek_sequencer/src/sequencer.rs
@@ -393,7 +393,7 @@ impl PhrasePlayer {
     pub fn enqueue_next   (&mut self, phrase: Option<&Arc<RwLock<Phrase>>>) {
         let start = self.clock.next_launch_pulse();
         self.next_phrase = Some((
-            Instant::from_pulse(&self.clock.timebase, start as f64),
+            Instant::from_pulse(&self.clock.timebase(), start as f64),
             phrase.map(|p|p.clone())
         ));
         self.reset = true;
diff --git a/crates/tek_sequencer/src/sequencer_snd.rs b/crates/tek_sequencer/src/sequencer_snd.rs
index 696fbb34..8e0831b2 100644
--- a/crates/tek_sequencer/src/sequencer_snd.rs
+++ b/crates/tek_sequencer/src/sequencer_snd.rs
@@ -26,8 +26,8 @@ impl Audio for PhrasePlayer {
                     let output   = &mut self.midi_out_buf;
                     let notes_on = &mut self.notes_out.write().unwrap();
                     let frame0   = frame0.saturating_sub(start_frame);
-                    let frameN   = frame0 + frames;
-                    let ticks    = self.clock.timebase.pulses_between_samples(frame0, frameN);
+                    let frame_n  = frame0 + frames;
+                    let ticks    = self.clock.timebase().pulses_between_samples(frame0, frame_n);
                     let mut buf  = Vec::with_capacity(8);
                     for (sample, tick) in ticks {
                         let tick = tick % phrase.length;
@@ -55,7 +55,7 @@ impl Audio for PhrasePlayer {
                             if self.monitoring { self.midi_out_buf[frame].push(bytes.to_vec()) }
                             if self.recording {
                                 phrase.record_event({
-                                    let pulse = self.clock.timebase.samples_to_pulse(
+                                    let pulse = self.clock.timebase().samples_to_pulse(
                                         (frame0 + frame - start_frame) as f64
                                     );
                                     let quantized = (pulse / quant).round() * quant;
diff --git a/crates/tek_sequencer/src/transport.rs b/crates/tek_sequencer/src/transport.rs
index 3659d235..c873d50c 100644
--- a/crates/tek_sequencer/src/transport.rs
+++ b/crates/tek_sequencer/src/transport.rs
@@ -1,8 +1,6 @@
 use crate::*;
 #[derive(Debug, Default)]
 pub struct TransportTime {
-    /// Current sample sr, tempo, and PPQ.
-    pub timebase: Arc<Timebase>,
     /// Current moment in time
     pub instant:  Instant,
     /// Note quantization factor
@@ -12,6 +10,9 @@ pub struct TransportTime {
     /// Playback state
     pub playing:  RwLock<Option<TransportState>>,
 }
+impl TransportTime {
+    pub fn timebase (&self) -> &Arc<Timebase> { &self.instant.timebase }
+}
 impl PulsePosition for TransportTime {
     #[inline] fn pulse (&self) -> &TimeUnit { self.instant.pulse() }
 }
@@ -58,13 +59,12 @@ impl<E: Engine> TransportToolbar<E> {
             clock: match clock {
                 Some(clock) => clock.clone(),
                 None => {
-                    let timebase = Timebase::default();
+                    let timebase = Arc::new(Timebase::default());
                     Arc::new(TransportTime {
                         playing:  Some(TransportState::Stopped).into(),
                         quant:    24.into(),
                         sync:     (timebase.ppq().get() * 4.).into(),
                         instant:  Instant::default(),
-                        timebase: timebase.into(),
                     })
                 }
             }
diff --git a/crates/tek_sequencer/src/transport_cmd.rs b/crates/tek_sequencer/src/transport_cmd.rs
index cc46650b..04f2b2bf 100644
--- a/crates/tek_sequencer/src/transport_cmd.rs
+++ b/crates/tek_sequencer/src/transport_cmd.rs
@@ -24,12 +24,12 @@ impl TransportToolbar<Tui> {
         Ok(Some(true))
     }
     fn handle_bpm (&mut self, from: &TuiInput) -> Perhaps<bool> {
-        let bpm = self.clock.timebase.bpm().get();
+        let bpm = self.clock.timebase().bpm().get();
         match from.event() {
-            key!(KeyCode::Char(',')) => { self.clock.timebase.bpm.set(bpm - 1.0);   },
-            key!(KeyCode::Char('.')) => { self.clock.timebase.bpm.set(bpm + 1.0);   },
-            key!(KeyCode::Char('<')) => { self.clock.timebase.bpm.set(bpm - 0.001); },
-            key!(KeyCode::Char('>')) => { self.clock.timebase.bpm.set(bpm + 0.001); },
+            key!(KeyCode::Char(',')) => { self.clock.timebase().bpm.set(bpm - 1.0);   },
+            key!(KeyCode::Char('.')) => { self.clock.timebase().bpm.set(bpm + 1.0);   },
+            key!(KeyCode::Char('<')) => { self.clock.timebase().bpm.set(bpm - 0.001); },
+            key!(KeyCode::Char('>')) => { self.clock.timebase().bpm.set(bpm + 0.001); },
             _ => return Ok(None)
         }
         Ok(Some(true))
diff --git a/crates/tek_sequencer/src/transport_tui.rs b/crates/tek_sequencer/src/transport_tui.rs
index 447c896d..dc7e6030 100644
--- a/crates/tek_sequencer/src/transport_tui.rs
+++ b/crates/tek_sequencer/src/transport_tui.rs
@@ -15,7 +15,7 @@ impl Content for TransportToolbar<Tui> {
 
             row!(
                 self.focus.wrap(self.focused, TransportToolbarFocus::Bpm, &Outset::X(1u16, {
-                    let bpm = self.clock.timebase.bpm().get();
+                    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! {