diff --git a/edn/src/edn_provide.rs b/edn/src/edn_provide.rs
index 87a85fb7..8cd14c52 100644
--- a/edn/src/edn_provide.rs
+++ b/edn/src/edn_provide.rs
@@ -17,7 +17,19 @@ use crate::*;
             }
         }
     };
-    // Provide a value that may also be a numeric literal in the EDN
+    // Provide a value that may also be a numeric literal in the EDN, to a generic implementation.
+    (# $type:ty:|$self:ident:<$T:ident:$Trait:path>|{ $($pat:pat => $expr:expr),* $(,)? }) => {
+        impl<'a, $T: $Trait> EdnProvide<'a, $type> for $T {
+            fn get <S: AsRef<str>> (&'a $self, edn: &'a EdnItem<S>) -> Option<$type> {
+                Some(match edn.to_ref() {
+                    $(EdnItem::Sym($pat) => $expr,)*
+                    EdnItem::Num(n) => n as $type,
+                    _ => return None
+                })
+            }
+        }
+    };
+    // Provide a value that may also be a numeric literal in the EDN, to a concrete implementation.
     (# $type:ty:|$self:ident:$State:ty|{ $($pat:pat => $expr:expr),* $(,)? }) => {
         impl<'a> EdnProvide<'a, $type> for $State {
             fn get <S: AsRef<str>> (&'a $self, edn: &'a EdnItem<S>) -> Option<$type> {
diff --git a/input/src/edn_input.rs b/input/src/edn_input.rs
index a5284f0e..1ae78e6b 100644
--- a/input/src/edn_input.rs
+++ b/input/src/edn_input.rs
@@ -15,6 +15,49 @@ pub trait EdnCommand<C>: Command<C> {
 
 /** Implement `EdnCommand` for given `State` and `Command` */
 #[macro_export] macro_rules! edn_command {
+    ($Command:ty : |$state:ident:<$T:ident: $Trait:path>| { $((
+        // identifier
+        $key:literal [
+            // named parameters
+            $(
+                // argument name
+                $arg:ident
+                // if type is not provided defaults to EdnItem
+                $(
+                    // type:name separator
+                    :
+                    // argument type
+                    $type:ty
+                )?
+            ),*
+            // rest of parameters
+            $(, ..$rest:ident)?
+        ]
+        // bound command:
+        $command:expr
+    ))* }) => {
+        impl<$T: $Trait> EdnCommand<$T> for $Command {
+            fn from_edn <'a> (
+                $state: &$T,
+                head: &EdnItem<&str>,
+                tail: &'a [EdnItem<&'a str>]
+            ) -> Option<Self> {
+                $(if let (EdnItem::Key($key), [ // if the identifier matches
+                    // bind argument ids
+                    $($arg),*
+                    // bind rest parameters
+                    $(, $rest @ ..)?
+                ]) = (head, tail) {
+                    $(
+                        $(let $arg: Option<$type> = EdnProvide::<$type>::get($state, $arg);)?
+                    )*
+                    //$(edn_command!(@bind $state => $arg $(?)? : $type);)*
+                    return Some($command)
+                })*
+                None
+            }
+        }
+    };
     ($Command:ty : |$state:ident:$State:ty| { $((
         // identifier
         $key:literal [
diff --git a/midi/src/midi_player.rs b/midi/src/midi_player.rs
index 4723f7c8..70a03086 100644
--- a/midi/src/midi_player.rs
+++ b/midi/src/midi_player.rs
@@ -108,7 +108,7 @@ from!(|state: (&Clock, &Arc<RwLock<MidiClip>>)|MidiPlayer = {
     model.play_clip = Some((Moment::zero(&clock.timebase), Some(clip.clone())));
     model
 });
-has_clock!(|self: MidiPlayer|&self.clock);
+has_clock!(|self: MidiPlayer|self.clock);
 impl HasMidiIns for MidiPlayer {
     fn midi_ins (&self) -> &Vec<JackPort<MidiIn>> { &self.midi_ins }
     fn midi_ins_mut (&mut self) -> &mut Vec<JackPort<MidiIn>> { &mut self.midi_ins }
diff --git a/tek/src/keys.edn b/tek/src/keys.edn
index 512c4f49..f60fc308 100644
--- a/tek/src/keys.edn
+++ b/tek/src/keys.edn
@@ -1,7 +1,7 @@
 (@u           undo 1)
 (@shift-u     redo 1)
-(@space       play/toggle)
-(@shift-space play/start-toggle)
+(@space       clock play 0)
+(@shift-space clock play 0)
 (@e           editor show :pool-clip)
 (@ctrl-a      scene add)
 (@ctrl-t      track add)
diff --git a/tek/src/lib.rs b/tek/src/lib.rs
index 0dd56c2a..bb406053 100644
--- a/tek/src/lib.rs
+++ b/tek/src/lib.rs
@@ -48,7 +48,7 @@ pub use ::tek_tui::{
     pub history:    Vec<AppCommand>,
 }
 has_size!(<TuiOut>|self: App|&self.size);
-has_clock!(|self: App|&self.clock);
+has_clock!(|self: App|self.clock);
 has_clips!(|self: App|self.pool.as_ref().expect("no clip pool").clips);
 //has_editor!(|self: App|self.editor.as_ref().expect("no editor"));
 has_jack!(|self: App|&self.jack);
@@ -427,33 +427,33 @@ handle!(TuiIn: |self: App, input|Ok({
 }
 edn_command!(AppCommand: |state: App| {
     ("stop-all" [] Self::StopAll)
-    ("compact"  [c: bool] Self::Compact(c))
-    ("color"    [c: Color] Self::Color(c.map(ItemPalette::from).unwrap_or_default()))
-    ("undo"     [d: usize] Self::History(-(d.unwrap_or(0)as isize)))
-    ("redo"     [d: usize] Self::History(d.unwrap_or(0) as isize))
-    ("zoom"     [z: usize] Self::Zoom(z))
-    ("select"   [t: usize, s: usize] match (t.expect("no track"), s.expect("no scene")) {
+    ("compact" [c: bool] Self::Compact(c))
+    ("color" [c: Color] Self::Color(c.map(ItemPalette::from).unwrap_or_default()))
+    ("undo" [d: usize] Self::History(-(d.unwrap_or(0)as isize)))
+    ("redo" [d: usize] Self::History(d.unwrap_or(0) as isize))
+    ("zoom" [z: usize] Self::Zoom(z))
+    ("enqueue" [c: Arc<RwLock<MidiClip>>] Self::Enqueue(c))
+    ("select" [t: usize, s: usize] match (t.expect("no track"), s.expect("no scene")) {
         (0, 0) => Self::Select(Selection::Mix),
         (t, 0) => Self::Select(Selection::Track(t - 1)),
         (0, s) => Self::Select(Selection::Scene(s - 1)),
         (t, s) => Self::Select(Selection::Clip(t - 1, s - 1)),
     })
-    ("enqueue"  [c: Arc<RwLock<MidiClip>>] Self::Enqueue(c))
 
-    ("clip"     [a, ..b] Self::Clip(
-        ClipCommand::from_edn(state, &a.to_ref(), b).expect("invalid command")))
-    ("clock"    [a, ..b] Self::Clock(
-        ClockCommand::from_edn(state, &a.to_ref(), b).expect("invalid command")))
-    ("editor"   [a, ..b] Self::Editor(
-        MidiEditCommand::from_edn(state.editor.as_ref().expect("no editor"), &a.to_ref(), b).expect("invalid command")))
-    ("pool"     [a, ..b] Self::Pool(
-        PoolCommand::from_edn(state.pool.as_ref().expect("no pool"), &a.to_ref(), b).expect("invalid command")))
-    ("sampler"  [a, ..b] Self::Sampler(
-        SamplerCommand::from_edn(state.sampler.as_ref().expect("no sampler"), &a.to_ref(), b).expect("invalid command")))
-    ("scene"    [a, ..b] Self::Scene(
-        SceneCommand::from_edn(state, &a.to_ref(), b).expect("invalid command")))
-    ("track"    [a, ..b] Self::Track(
-        TrackCommand::from_edn(state, &a.to_ref(), b).expect("invalid command")))
+    ("clip" [a, ..b] Self::Clip(ClipCommand::from_edn(state, &a.to_ref(), b)
+        .expect("invalid command")))
+    ("clock" [a, ..b] Self::Clock(ClockCommand::from_edn(state.clock(), &a.to_ref(), b)
+        .expect("invalid command")))
+    ("editor" [a, ..b] Self::Editor(MidiEditCommand::from_edn(state.editor.as_ref().expect("no editor"), &a.to_ref(), b)
+        .expect("invalid command")))
+    ("pool" [a, ..b] Self::Pool(PoolCommand::from_edn(state.pool.as_ref().expect("no pool"), &a.to_ref(), b)
+        .expect("invalid command")))
+    ("sampler" [a, ..b] Self::Sampler(SamplerCommand::from_edn(state.sampler.as_ref().expect("no sampler"), &a.to_ref(), b)
+        .expect("invalid command")))
+    ("scene" [a, ..b] Self::Scene(SceneCommand::from_edn(state, &a.to_ref(), b)
+        .expect("invalid command")))
+    ("track" [a, ..b] Self::Track(TrackCommand::from_edn(state, &a.to_ref(), b)
+        .expect("invalid command")))
 });
 command!(|self: AppCommand, state: App|match self {
     Self::Zoom(_)        => { println!("\n\rtodo: global zoom"); None },
@@ -574,7 +574,7 @@ pub trait HasSelection {
     /// Device chain
     devices:    Vec<Box<dyn Device>>,
 }
-has_clock!(|self: Track|self.player.clock());
+has_clock!(|self: Track|self.player.clock);
 has_player!(|self: Track|self.player);
 impl Track {
     const MIN_WIDTH: usize = 9;
diff --git a/time/src/clock.rs b/time/src/clock.rs
index 7e3b9724..6f863bc2 100644
--- a/time/src/clock.rs
+++ b/time/src/clock.rs
@@ -1,11 +1,13 @@
 use crate::*;
 pub trait HasClock: Send + Sync {
     fn clock (&self) -> &Clock;
+    fn clock_mut (&mut self) -> &mut Clock;
 }
 #[macro_export] macro_rules! has_clock {
     (|$self:ident:$Struct:ident$(<$($L:lifetime),*$($T:ident$(:$U:path)?),*>)?|$cb:expr) => {
         impl $(<$($L),*$($T $(: $U)?),*>)? HasClock for $Struct $(<$($L),*$($T),*>)? {
-            fn clock (&$self) -> &Clock { $cb }
+            fn clock (&$self) -> &Clock { &$cb }
+            fn clock_mut (&mut $self) -> &mut Clock { &mut $cb }
         }
     }
 }
@@ -20,23 +22,35 @@ pub enum ClockCommand {
     SetQuant(f64),
     SetSync(f64),
 }
-impl<T: HasClock> EdnCommand<T> for ClockCommand {
-    fn from_edn <'a> (state: &T, head: &EdnItem<&str>, tail: &'a [EdnItem<&str>]) -> Option<Self> {
-        todo!()
-    }
-}
+edn_provide!(# u32: |self: Clock| {});
+edn_provide!(f64: |self: Clock| {});
+edn_command!(ClockCommand: |state: Clock| {
+    ("play"        [t: u32] Self::Play(t))
+    ("pause"       [t: u32] Self::Pause(t))
+    ("seek/usec"   [t: f64] Self::SeekUsec(t.expect("no usec")))
+    ("seek/pulse"  [t: f64] Self::SeekPulse(t.expect("no pulse")))
+    ("seek/sample" [t: f64] Self::SeekSample(t.expect("no sample")))
+    ("set/bpm"     [t: f64] Self::SetBpm(t.expect("no bpm")))
+    ("set/sync"    [t: f64] Self::SetSync(t.expect("no sync")))
+    ("set/quant"   [t: f64] Self::SetQuant(t.expect("no quant")))
+});
 impl<T: HasClock> Command<T> for ClockCommand {
     fn execute (self, state: &mut T) -> Perhaps<Self> {
+        self.execute(state.clock_mut())
+    }
+}
+impl Command<Clock> for ClockCommand {
+    fn execute (self, state: &mut Clock) -> Perhaps<Self> {
         use ClockCommand::*;
         match self {
-            Play(start)        => state.clock().play_from(start)?,
-            Pause(pause)       => state.clock().pause_at(pause)?,
-            SeekUsec(usec)     => state.clock().playhead.update_from_usec(usec),
-            SeekSample(sample) => state.clock().playhead.update_from_sample(sample),
-            SeekPulse(pulse)   => state.clock().playhead.update_from_pulse(pulse),
-            SetBpm(bpm)        => return Ok(Some(SetBpm(state.clock().timebase().bpm.set(bpm)))),
-            SetQuant(quant)    => return Ok(Some(SetQuant(state.clock().quant.set(quant)))),
-            SetSync(sync)      => return Ok(Some(SetSync(state.clock().sync.set(sync)))),
+            Play(start)        => state.play_from(start)?,
+            Pause(pause)       => state.pause_at(pause)?,
+            SeekUsec(usec)     => state.playhead.update_from_usec(usec),
+            SeekSample(sample) => state.playhead.update_from_sample(sample),
+            SeekPulse(pulse)   => state.playhead.update_from_pulse(pulse),
+            SetBpm(bpm)        => return Ok(Some(SetBpm(state.timebase().bpm.set(bpm)))),
+            SetQuant(quant)    => return Ok(Some(SetQuant(state.quant.set(quant)))),
+            SetSync(sync)      => return Ok(Some(SetSync(state.sync.set(sync)))),
         };
         Ok(None)
     }