fix canvas density; play sampler from sequencer; jump to pressed key

crates/tek/src/groovebox.rs

@@ -49,12 +49,20 @@ audio!(|self: GrooveboxTui, client, scope|{
     if Control::Quit == ClockAudio(&mut self.player).process(client, scope) {
         return Control::Quit
     }
+    if Control::Quit == PlayerAudio(
+        &mut self.player, &mut self.note_buf, &mut self.midi_buf
+    ).process(client, scope) {
+        return Control::Quit
+    }
     if Control::Quit == SamplerAudio(&mut self.sampler).process(client, scope) {
         return Control::Quit
     }
-    for RawMidi { time, bytes } in self.sampler.midi_in.iter(scope) {
+    for RawMidi { time, bytes } in self.player.midi_ins[0].iter(scope) {
         if let LiveEvent::Midi { message, .. } = LiveEvent::parse(bytes).unwrap() {
             match message {
+                MidiMessage::NoteOn { ref key, .. } => {
+                    self.editor.set_note_point(key.as_int() as usize);
+                },
                 MidiMessage::Controller { controller, value } => {
                     if controller == u7::from(20) {
                         if let Some(sample) = &self.sampler.mapped[self.editor.note_point()] {

crates/tek/src/sampler/sample_viewer.rs

@@ -26,7 +26,7 @@ render!(<Tui>|self: SampleViewer|render(|to|{
                 let x = t as f64;
                 let y = meter as f64;
                 lines.push(Line::new(x, min_db, x, y, Color::Green));
-                t += step;
+                t += step / 2.;
             }
             (
                 [sample.start as f64, sample.end as f64],