1 files changed, 44 insertions, 0 deletions
diff --git a/lib/tests/test_pipeline.py b/lib/tests/test_pipeline.py
index da2e9da..b3f91f1 100644
--- a/lib/tests/test_pipeline.py
+++ b/lib/tests/test_pipeline.py
@@ -19,6 +19,16 @@ def test_stage_order_and_names():
     assert by_name["levelling"].enabled is True
 
 
+def test_denoise_stage_detail_shows_pf():
+    opts = Options()
+    stages = pipeline.build_stages(opts)
+    assert "pf=off" in stages[0].detail
+    assert "leveling" not in stages[0].detail
+    opts.denoise_pf = True
+    stages = pipeline.build_stages(opts)
+    assert "pf=on" in stages[0].detail
+
+
 def test_full_chain_profile_bounds(sr):
     opts = Options()
     opts.denoise = "off"
@@ -68,3 +78,37 @@ def test_podcast_profile_bounds(sr):
     res = pipeline.run_pipeline(x, sr, opts)
     assert abs(meters.lufs(res.audio, sr) + 16.0) < 0.8
     assert meters.true_peak_db(res.audio, sr) <= -1.4
+
+
+def test_dsp_pregain_makes_chain_level_invariant(sr):
+    """The voice chain must treat a quiet and a hot take identically.
+
+    Denoised files often arrive far below the chain's design level; without
+    the pre-gain the absolute comp thresholds would idle (or slam) depending
+    on input level alone.
+    """
+    hot = Options()
+    hot.denoise = "off"
+    hot.enhance = "off"
+    hot.levelling = False
+    quiet = Options()
+    quiet.denoise = "off"
+    quiet.enhance = "off"
+    quiet.levelling = False
+    x_hot = speechish(6.0, sr, level_dbfs=-14.0)
+    x_quiet = speechish(6.0, sr, level_dbfs=-38.0)
+    y_hot = pipeline.run_pipeline(x_hot, sr, hot).audio
+    y_quiet = pipeline.run_pipeline(x_quiet, sr, quiet).audio
+    diff = abs(meters.rms_db(y_hot) - meters.rms_db(y_quiet))
+    assert diff < 1.0
+
+
+def test_dsp_pregain_note_recorded(sr):
+    opts = Options()
+    opts.denoise = "off"
+    opts.enhance = "off"
+    notes: list[str] = []
+    stages = pipeline.build_stages(opts, notes)
+    dsp_stage = next(s for s in stages if s.name == "dsp")
+    dsp_stage.fn(speechish(4.0, sr, level_dbfs=-30.0), sr)
+    assert any("pregain" in n for n in notes)