we have audio rendering working! :D

requirements.txt

@@ -0,0 +1,4 @@
+pymp3
+textual
+textual-slider
+numpy

src/ui/app.py

@@ -6,6 +6,10 @@ from ui.widgets.timeline import Timeline
 
 
 class AppUI(App):    
+    def __init__(self):
+        super().__init__()
+        self.zoom_level = 0.1
+    
     def compose(self) -> ComposeResult:
         yield Sidebar()
         yield Timeline()

src/ui/widgets/chunk_types/audio.py

@@ -0,0 +1,67 @@
+import librosa
+import pyloudnorm as pyln
+import math
+
+from textual.containers import Vertical
+from textual.widgets import Sparkline
+
+from ui.widgets.chunk_types.chunk import Chunk
+
+
+
+class AudioChunk(Chunk):
+    DEFAULT_CSS = """
+    AudioChunk {
+        
+        Sparkline {
+            margin: 1;
+        }
+        
+    }
+    """
+
+    def __init__(self, file_path: str, chunk_name: str = "Sample"):
+        super().__init__(chunk_name)
+        
+        self.file_path = file_path
+        self.audio, self.sample_rate = librosa.load(self.file_path, sr=None, mono=False)
+        
+        
+        self.num_channels = None
+        if len(self.audio.shape) == 1:
+            self.num_samples = self.audio.shape[0]
+            self.num_channels = 1
+        else:
+            self.num_samples = self.audio.shape[1]
+            self.num_channels = self.audio.shape[0]
+        self.notify(str(self.num_samples))
+        
+        self.meter = pyln.Meter(self.sample_rate)
+        self.loudness_values = []
+        
+        self.styles.width = (self.num_samples / self.sample_rate) / self.app.zoom_level
+    
+        
+    def compose(self) -> ComposeResult:
+        
+        
+        # account for multi-track audio and mono audio
+        if self.num_channels > 1:
+            # loop over each channel in the audio and display it seperately
+            for channel in range(self.num_channels):
+                
+                samples = []
+                
+                for sample in range(0, self.num_samples, int(self.sample_rate*0.1)):
+                    samples.append(self.audio[channel, sample])
+                    
+                yield Sparkline(data=samples)
+        else:
+            # just display the one channel
+            samples = []
+            
+            for sample in range(0, self.num_samples, int(self.sample_rate*0.1)):
+                samples.append(self.audio[sample])
+                
+            yield Sparkline(data=samples)
+        

src/ui/widgets/chunk_types/chunk.py

@@ -0,0 +1,19 @@
+from textual.containers import Container
+
+
+class Chunk(Container):
+    """
+    base class for creating draggable views in the timeline for MIDI, Audio, etc...
+    """
+    
+    DEFAULT_CSS = """
+    Chunk {
+        border: panel $secondary;
+        background: $surface-darken-1;
+    }
+    """
+    
+    def __init__(self, chunk_name: str = "Chunk"):
+        super().__init__()
+        self.chunk_name = chunk_name
+        self.border_title = chunk_name

src/ui/widgets/timeline.py

@@ -1,6 +1,9 @@
-from textual.containers import VerticalScroll, Horizontal
+from textual.containers import Vertical,  VerticalScroll, Horizontal, VerticalGroup
+from textual.widgets import Sparkline
 from textual.app import ComposeResult
 
+from ui.widgets.chunk_types.audio import AudioChunk
+
 
 class TimelineRow(Horizontal):
     DEFAULT_CSS = """
@@ -10,9 +13,6 @@ class TimelineRow(Horizontal):
         margin-bottom: 1;
     }
     """
-    
-    def compose(self) -> ComposeResult:
-        yield from ()
 
 class Timeline(VerticalScroll):
     DEFAULT_CSS = """
@@ -23,5 +23,7 @@ class Timeline(VerticalScroll):
     """
     
     def compose(self) -> ComposeResult:
-        yield TimelineRow()
-        yield TimelineRow()
+        with TimelineRow():
+            yield AudioChunk("cool sample.mp3")
+        with TimelineRow():
+            yield AudioChunk("cool sample 2.mp3")