diff --git a/services/analysis-engine/src/bandscope_analysis/temporal/analyzer.py b/services/analysis-engine/src/bandscope_analysis/temporal/analyzer.py
index dc9113c..a5b4b95 100644
--- a/services/analysis-engine/src/bandscope_analysis/temporal/analyzer.py
+++ b/services/analysis-engine/src/bandscope_analysis/temporal/analyzer.py
@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import logging
+import warnings
 from pathlib import Path
 from typing import Any
 
@@ -35,11 +36,17 @@ def analyze(self, audio_path: str | Path) -> TemporalFeatures:
             TemporalFeatures containing BPM and beat grids.
         """
         path_str = str(audio_path)
+        if not Path(audio_path).exists():
+            raise FileNotFoundError(f"Audio file not found: {path_str}")
+
         logger.info(f"Loading and decoding audio: {path_str}")
 
         try:
             # Load audio, converting to mono and standardizing sample rate
-            y, sr = librosa.load(path_str, sr=TARGET_SR, mono=True)
+            with warnings.catch_warnings():
+                warnings.simplefilter("ignore", category=DeprecationWarning)
+                warnings.simplefilter("ignore", category=FutureWarning)
+                y, sr = librosa.load(path_str, sr=TARGET_SR, mono=True)
 
             # Ensure it's a 1D float array for librosa
             if not isinstance(y, np.ndarray):
diff --git a/services/analysis-engine/tests/test_chord_recognizer.py b/services/analysis-engine/tests/test_chord_recognizer.py
index 7033e73..f9676ff 100644
--- a/services/analysis-engine/tests/test_chord_recognizer.py
+++ b/services/analysis-engine/tests/test_chord_recognizer.py
@@ -29,7 +29,7 @@ def test_chord_recognizer_c_major_chord() -> None:
     """Test chord recognition with a clear C major chord."""
     recognizer = ChordRecognizer()
     sr = 22050
-    t = np.linspace(0, 1.0, sr)
+    t = np.linspace(0, 3.0, sr * 3, endpoint=False)
     # C major: C4 (261.63Hz), E4 (329.63Hz), G4 (392.00Hz)
     y = (
         np.sin(2 * np.pi * 261.63 * t)
@@ -47,7 +47,7 @@ def test_chord_recognizer_c_major_chord() -> None:
 def test_chord_recognizer_hpss_exception():
     """Test for test_chord_recognizer_hpss_exception."""
     recognizer = ChordRecognizer()
-    y = np.random.randn(22050)
+    y = np.random.randn(22050 * 3)
 
     with patch("librosa.effects.hpss", side_effect=Exception("HPSS Error")):
         chords = recognizer.recognize(y, sr=22050)
@@ -57,7 +57,7 @@ def test_chord_recognizer_hpss_exception():
 def test_chord_recognizer_chroma_cqt_exception():
     """Test for test_chord_recognizer_chroma_cqt_exception."""
     recognizer = ChordRecognizer()
-    y = np.random.randn(22050)
+    y = np.random.randn(22050 * 3)
 
     with patch("librosa.feature.chroma_cqt", side_effect=Exception("CQT Error")):
         chords = recognizer.recognize(y, sr=22050)
@@ -67,7 +67,7 @@ def test_chord_recognizer_chroma_cqt_exception():
 def test_chord_recognizer_rms_exception():
     """Test for test_chord_recognizer_rms_exception."""
     recognizer = ChordRecognizer()
-    y = np.random.randn(22050)
+    y = np.random.randn(22050 * 3)
 
     with patch("librosa.feature.rms", side_effect=Exception("RMS Error")):
         chords = recognizer.recognize(y, sr=22050)
@@ -77,7 +77,7 @@ def test_chord_recognizer_rms_exception():
 def test_chord_recognizer_rms_padding():
     """Test for test_chord_recognizer_rms_padding."""
     recognizer = ChordRecognizer()
-    y = np.random.randn(22050)
+    y = np.random.randn(22050 * 3)
 
     # Mock RMS to return something shorter than chromagram
     def mock_rms(*args, **kwargs):
@@ -91,7 +91,7 @@ def mock_rms(*args, **kwargs):
 def test_chord_recognizer_empty_chromagram():
     """Test for test_chord_recognizer_empty_chromagram."""
     recognizer = ChordRecognizer()
-    y = np.random.randn(22050)
+    y = np.random.randn(22050 * 3)
 
     # Mock chroma_cqt to return empty array
     with patch("librosa.feature.chroma_cqt", return_value=np.array([])):
@@ -102,7 +102,7 @@ def test_chord_recognizer_empty_chromagram():
 def test_chord_recognizer_rms_longer():
     """Test for test_chord_recognizer_rms_longer."""
     recognizer = ChordRecognizer()
-    y = np.random.randn(22050)
+    y = np.random.randn(22050 * 3)
 
     # Mock RMS to return something longer than chromagram
     def mock_rms(*args, **kwargs):
@@ -118,7 +118,7 @@ def test_chord_recognizer_changing_chords():
     """Test for test_chord_recognizer_changing_chords."""
     recognizer = ChordRecognizer()
     sr = 22050
-    t1 = np.linspace(0, 1.0, sr, endpoint=False)
+    t1 = np.linspace(0, 3.0, sr * 3, endpoint=False)
     # C major
     y1 = (
         np.sin(2 * np.pi * 261.63 * t1)
@@ -126,7 +126,7 @@ def test_chord_recognizer_changing_chords():
         + np.sin(2 * np.pi * 392.00 * t1)
     ) / 3.0
 
-    t2 = np.linspace(0, 1.0, sr, endpoint=False)
+    t2 = np.linspace(0, 3.0, sr * 3, endpoint=False)
     # G major: G4 (392.00Hz), B4 (493.88Hz), D5 (587.33Hz)
     y2 = (
         np.sin(2 * np.pi * 392.00 * t2)
diff --git a/services/analysis-engine/tests/test_temporal.py b/services/analysis-engine/tests/test_temporal.py
index 28f9586..ed9e4f8 100644
--- a/services/analysis-engine/tests/test_temporal.py
+++ b/services/analysis-engine/tests/test_temporal.py
@@ -45,7 +45,7 @@ def test_temporal_analyzer_basic(dummy_audio_file: Path) -> None:
 def test_temporal_analyzer_file_not_found() -> None:
     """Test that analyzer raises appropriate error for missing files."""
     analyzer = TemporalAnalyzer()
-    with pytest.raises(ValueError, match="Temporal analysis failed"):
+    with pytest.raises(FileNotFoundError, match="Audio file not found"):
         analyzer.analyze("nonexistent_file.wav")