diff --git a/crates/tek/src/api/_todo_api_mixer.rs b/crates/tek/src/api/_todo_api_mixer.rs
index cd8df774..8e5f0135 100644
--- a/crates/tek/src/api/_todo_api_mixer.rs
+++ b/crates/tek/src/api/_todo_api_mixer.rs
@@ -20,8 +20,4 @@ impl From<&Arc<RwLock<Mixer>>> for MixerAudio {
     }
 }
 
-impl Audio for MixerAudio {
-    fn process (&mut self, _: &Client, _: &ProcessScope) -> Control {
-        Control::Continue
-    }
-}
+audio!(|self: MixerAudio, _, _|Control::Continue);
diff --git a/crates/tek/src/api/_todo_api_plugin.rs b/crates/tek/src/api/_todo_api_plugin.rs
index 3edbac42..161c59d7 100644
--- a/crates/tek/src/api/_todo_api_plugin.rs
+++ b/crates/tek/src/api/_todo_api_plugin.rs
@@ -62,53 +62,51 @@ impl From<&Arc<RwLock<Plugin>>> for PluginAudio {
     }
 }
 
-impl Audio for PluginAudio {
-    fn process (&mut self, _: &Client, scope: &ProcessScope) -> Control {
-        let state = &mut*self.0.write().unwrap();
-        match state.plugin.as_mut() {
-            Some(PluginKind::LV2(LV2Plugin {
-                features,
-                ref mut instance,
-                ref mut input_buffer,
-                ..
-            })) => {
-                let urid = features.midi_urid();
-                input_buffer.clear();
-                for port in state.midi_ins.iter() {
-                    let mut atom = ::livi::event::LV2AtomSequence::new(
-                        &features,
-                        scope.n_frames() as usize
-                    );
-                    for event in port.iter(scope) {
-                        match event.bytes.len() {
-                            3 => atom.push_midi_event::<3>(
-                                event.time as i64,
-                                urid,
-                                &event.bytes[0..3]
-                            ).unwrap(),
-                            _ => {}
-                        }
+audio!(|self: PluginAudio, _, _|{
+    let state = &mut*self.0.write().unwrap();
+    match state.plugin.as_mut() {
+        Some(PluginKind::LV2(LV2Plugin {
+            features,
+            ref mut instance,
+            ref mut input_buffer,
+            ..
+        })) => {
+            let urid = features.midi_urid();
+            input_buffer.clear();
+            for port in state.midi_ins.iter() {
+                let mut atom = ::livi::event::LV2AtomSequence::new(
+                    &features,
+                    scope.n_frames() as usize
+                );
+                for event in port.iter(scope) {
+                    match event.bytes.len() {
+                        3 => atom.push_midi_event::<3>(
+                            event.time as i64,
+                            urid,
+                            &event.bytes[0..3]
+                        ).unwrap(),
+                        _ => {}
                     }
-                    input_buffer.push(atom);
                 }
-                let mut outputs = vec![];
-                for _ in state.midi_outs.iter() {
-                    outputs.push(::livi::event::LV2AtomSequence::new(
-                        &features,
-                        scope.n_frames() as usize
-                    ));
-                }
-                let ports = ::livi::EmptyPortConnections::new()
-                    .with_atom_sequence_inputs(input_buffer.iter())
-                    .with_atom_sequence_outputs(outputs.iter_mut())
-                    .with_audio_inputs(state.audio_ins.iter().map(|o|o.as_slice(scope)))
-                    .with_audio_outputs(state.audio_outs.iter_mut().map(|o|o.as_mut_slice(scope)));
-                unsafe {
-                    instance.run(scope.n_frames() as usize, ports).unwrap()
-                };
-            },
-            _ => {}
-        }
-        Control::Continue
+                input_buffer.push(atom);
+            }
+            let mut outputs = vec![];
+            for _ in state.midi_outs.iter() {
+                outputs.push(::livi::event::LV2AtomSequence::new(
+                    &features,
+                    scope.n_frames() as usize
+                ));
+            }
+            let ports = ::livi::EmptyPortConnections::new()
+                .with_atom_sequence_inputs(input_buffer.iter())
+                .with_atom_sequence_outputs(outputs.iter_mut())
+                .with_audio_inputs(state.audio_ins.iter().map(|o|o.as_slice(scope)))
+                .with_audio_outputs(state.audio_outs.iter_mut().map(|o|o.as_mut_slice(scope)));
+            unsafe {
+                instance.run(scope.n_frames() as usize, ports).unwrap()
+            };
+        },
+        _ => {}
     }
-}
+    Control::Continue
+});
diff --git a/crates/tek/src/api/jack.rs b/crates/tek/src/api/jack.rs
index d93c8e66..99b0edcf 100644
--- a/crates/tek/src/api/jack.rs
+++ b/crates/tek/src/api/jack.rs
@@ -1,5 +1,29 @@
 use crate::*;
 
+/// Trait for things that have a JACK process callback.
+pub trait Audio: Send + Sync {
+    fn process (&mut self, _: &Client, _: &ProcessScope) -> Control {
+        Control::Continue
+    }
+    fn callback (
+        state: &Arc<RwLock<Self>>, client: &Client, scope: &ProcessScope
+    ) -> Control where Self: Sized {
+        if let Ok(mut state) = state.write() {
+            state.process(client, scope)
+        } else {
+            Control::Quit
+        }
+    }
+}
+
+#[macro_export] macro_rules! audio {
+    (|$self:ident:$Struct:ident$(<$($L:lifetime),*$($T:ident$(:$U:path)?),*>)?,$c:ident,$s:ident|$cb:expr) => {
+        impl $(<$($L),*$($T $(: $U)?),*>)? Audio for $Struct $(<$($L),*$($T),*>)? {
+            #[inline] fn process (&mut $self, $c: &Client, $s: &ProcessScope) -> Control { $cb }
+        }
+    }
+}
+
 pub trait HasMidiIns {
     fn midi_ins (&self) -> &Vec<Port<MidiIn>>;
     fn midi_ins_mut (&mut self) -> &mut Vec<Port<MidiIn>>;
@@ -54,22 +78,6 @@ impl JackActivate for JackClient {
     }
 }
 
-/// Trait for things that have a JACK process callback.
-pub trait Audio: Send + Sync {
-    fn process(&mut self, _: &Client, _: &ProcessScope) -> Control {
-        Control::Continue
-    }
-    fn callback(
-        state: &Arc<RwLock<Self>>, client: &Client, scope: &ProcessScope
-    ) -> Control where Self: Sized {
-        if let Ok(mut state) = state.write() {
-            state.process(client, scope)
-        } else {
-            Control::Quit
-        }
-    }
-}
-
 /// A UI component that may be associated with a JACK client by the `Jack` factory.
 pub trait AudioComponent<E: Engine>: Component<E> + Audio {
     /// Perform type erasure for collecting heterogeneous devices.
diff --git a/crates/tek/src/api/sampler.rs b/crates/tek/src/api/sampler.rs
index 260fbf53..07855dbd 100644
--- a/crates/tek/src/api/sampler.rs
+++ b/crates/tek/src/api/sampler.rs
@@ -96,15 +96,13 @@ impl From<&Arc<RwLock<Sampler>>> for SamplerAudio {
     }
 }
 
-impl Audio for SamplerAudio {
-    #[inline] fn process (&mut self, _: &Client, scope: &ProcessScope) -> Control {
-        self.process_midi_in(scope);
-        self.clear_output_buffer();
-        self.process_audio_out(scope);
-        self.write_output_buffer(scope);
-        Control::Continue
-    }
-}
+audio!(|self: SamplerAudio, _client, scope|{
+    self.process_midi_in(scope);
+    self.clear_output_buffer();
+    self.process_audio_out(scope);
+    self.write_output_buffer(scope);
+    Control::Continue
+});
 
 impl SamplerAudio {
 
diff --git a/crates/tek/src/tui/app_arranger.rs b/crates/tek/src/tui/app_arranger.rs
index 35da9a0b..884eb487 100644
--- a/crates/tek/src/tui/app_arranger.rs
+++ b/crates/tek/src/tui/app_arranger.rs
@@ -323,53 +323,11 @@ impl TransportControl<ArrangerFocus> for ArrangerTui {
         }
     }
 }
-
-impl Audio for ArrangerTui {
-    #[inline] fn process (&mut self, client: &Client, scope: &ProcessScope) -> Control {
-        // Start profiling cycle
-        let t0 = self.perf.get_t0();
-
-        // Update transport clock
-        if ClockAudio(self).process(client, scope) == Control::Quit {
-            return Control::Quit
-        }
-
-        // Update MIDI sequencers
-        if TracksAudio(
-            &mut self.tracks,
-            &mut self.note_buf,
-            &mut self.midi_buf,
-            Default::default(),
-        ).process(client, scope) == Control::Quit {
-            return Control::Quit
-        }
-
-        // FIXME: one of these per playing track
-        //self.now.set(0.);
-        //if let ArrangerSelection::Clip(t, s) = self.selected {
-            //let phrase = self.scenes().get(s).map(|scene|scene.clips.get(t));
-            //if let Some(Some(Some(phrase))) = phrase {
-                //if let Some(track) = self.tracks().get(t) {
-                    //if let Some((ref started_at, Some(ref playing))) = track.player.play_phrase {
-                        //let phrase = phrase.read().unwrap();
-                        //if *playing.read().unwrap() == *phrase {
-                            //let pulse = self.current().pulse.get();
-                            //let start = started_at.pulse.get();
-                            //let now   = (pulse - start) % phrase.length as f64;
-                            //self.now.set(now);
-                        //}
-                    //}
-                //}
-            //}
-        //}
-        
-        // End profiling cycle
-        self.perf.update(t0, scope);
-
-        return Control::Continue
-    }
-}
-
+has_clock!(|self:ArrangerTui|&self.clock);
+has_clock!(|self:ArrangerTrack|self.player.clock());
+has_phrases!(|self:ArrangerTui|self.phrases.phrases);
+has_editor!(|self:ArrangerTui|self.editor);
+has_player!(|self:ArrangerTrack|self.player);
 // Layout for standalone arranger app.
 render!(|self: ArrangerTui|{
     let arranger_focused = self.arranger_focused();
@@ -411,12 +369,43 @@ render!(|self: ArrangerTui|{
         ])
     ])
 });
-
-has_clock!(|self:ArrangerTui|&self.clock);
-has_clock!(|self:ArrangerTrack|self.player.clock());
-has_phrases!(|self:ArrangerTui|self.phrases.phrases);
-has_editor!(|self:ArrangerTui|self.editor);
-has_player!(|self:ArrangerTrack|self.player);
+audio!(|self: ArrangerTui, client, scope|{
+    // Start profiling cycle
+    let t0 = self.perf.get_t0();
+    // Update transport clock
+    if ClockAudio(self).process(client, scope) == Control::Quit {
+        return Control::Quit
+    }
+    // Update MIDI sequencers
+    let tracks   = &mut self.tracks;
+    let note_buf = &mut self.note_buf;
+    let midi_buf = &mut self.midi_buf;
+    if TracksAudio(tracks, note_buf, midi_buf, Default::default())
+        .process(client, scope) == Control::Quit {
+            return Control::Quit
+        }
+    // FIXME: one of these per playing track
+    //self.now.set(0.);
+    //if let ArrangerSelection::Clip(t, s) = self.selected {
+        //let phrase = self.scenes().get(s).map(|scene|scene.clips.get(t));
+        //if let Some(Some(Some(phrase))) = phrase {
+            //if let Some(track) = self.tracks().get(t) {
+                //if let Some((ref started_at, Some(ref playing))) = track.player.play_phrase {
+                    //let phrase = phrase.read().unwrap();
+                    //if *playing.read().unwrap() == *phrase {
+                        //let pulse = self.current().pulse.get();
+                        //let start = started_at.pulse.get();
+                        //let now   = (pulse - start) % phrase.length as f64;
+                        //self.now.set(now);
+                    //}
+                //}
+            //}
+        //}
+    //}
+    // End profiling cycle
+    self.perf.update(t0, scope);
+    return Control::Continue
+});
 
 impl HasPhraseList for ArrangerTui {
     fn phrases_focused (&self) -> bool {
diff --git a/crates/tek/src/tui/app_sampler.rs b/crates/tek/src/tui/app_sampler.rs
index 2fa6b9a2..795b5f58 100644
--- a/crates/tek/src/tui/app_sampler.rs
+++ b/crates/tek/src/tui/app_sampler.rs
@@ -50,6 +50,7 @@ pub enum SamplerFocus {
     _TODO
 }
 
+audio!(|self: SamplerTui, _client, _scope|Control::Continue);
 render!(|self: SamplerTui|render(|to|{
     let [x, y, _, height] = to.area();
     let style = Style::default().gray();
@@ -93,11 +94,6 @@ impl SamplerTui {
         None
     }
 }
-impl Audio for SamplerTui {
-    #[inline] fn process (&mut self, client: &Client, scope: &ProcessScope) -> Control {
-        Control::Continue
-    }
-}
 
 pub struct AddSampleModal {
     exited:  bool,
diff --git a/crates/tek/src/tui/app_sequencer.rs b/crates/tek/src/tui/app_sequencer.rs
index 3c2022dd..c8a70f20 100644
--- a/crates/tek/src/tui/app_sequencer.rs
+++ b/crates/tek/src/tui/app_sequencer.rs
@@ -61,26 +61,6 @@ pub enum SequencerFocus {
     PhraseEditor,
 }
 
-impl Audio for SequencerTui {
-    fn process (&mut self, client: &Client, scope: &ProcessScope) -> Control {
-        // Start profiling cycle
-        let t0 = self.perf.get_t0();
-        // Update transport clock
-        if Control::Quit == ClockAudio(self).process(client, scope) {
-            return Control::Quit
-        }
-        // Update MIDI sequencer
-        if Control::Quit == PlayerAudio(
-            &mut self.player, &mut self.note_buf, &mut self.midi_buf
-        ).process(client, scope) {
-            return Control::Quit
-        }
-        // End profiling cycle
-        self.perf.update(t0, scope);
-        Control::Continue
-    }
-}
-
 #[derive(Clone, Debug)]
 pub enum SequencerCommand {
     Focus(FocusCommand<SequencerFocus>),
@@ -175,6 +155,24 @@ pub fn to_sequencer_command (state: &SequencerTui, input: &TuiInput) -> Option<S
     })
 }
 
+audio!(|self:SequencerTui,client,scope|{
+    // Start profiling cycle
+    let t0 = self.perf.get_t0();
+    // Update transport clock
+    if Control::Quit == ClockAudio(self).process(client, scope) {
+        return Control::Quit
+    }
+    // Update MIDI sequencer
+    if Control::Quit == PlayerAudio(
+        &mut self.player, &mut self.note_buf, &mut self.midi_buf
+    ).process(client, scope) {
+        return Control::Quit
+    }
+    // End profiling cycle
+    self.perf.update(t0, scope);
+    Control::Continue
+});
+
 render!(|self: SequencerTui|lay!([self.size, Tui::split_up(false, 1,
     Tui::fill_xy(SequencerStatusBar::from(self)),
     Tui::split_right(false, if self.size.w() > 60 {
diff --git a/crates/tek/src/tui/app_transport.rs b/crates/tek/src/tui/app_transport.rs
index af48ff98..b4c3cd6b 100644
--- a/crates/tek/src/tui/app_transport.rs
+++ b/crates/tek/src/tui/app_transport.rs
@@ -38,13 +38,7 @@ impl std::fmt::Debug for TransportTui {
 }
 
 has_clock!(|self:TransportTui|&self.clock);
-
-impl Audio for TransportTui {
-    fn process (&mut self, client: &Client, scope: &ProcessScope) -> Control {
-        ClockAudio(self).process(client, scope)
-    }
-}
-
+audio!(|self:TransportTui,client,scope|ClockAudio(self).process(client, scope));
 render!(|self: TransportTui|TransportView::from((self, None, true)));
 
 pub struct TransportView {