fix: made crtl+c work

sync_audio_test.py

@@ -13,7 +13,7 @@ Run: make ast  or  .venv/bin/python sync_audio_test.py --config config.toml
 """
 
 from __future__ import annotations
-import os, sys, math, argparse
+import os, sys, math, argparse, signal
 import numpy as np
 
 # allow tomllib (py3.11+) with tomli fallback
@@ -38,7 +38,7 @@ except ImportError:
     HAS_SD = False
 
 from sync_audio import load_wav, correlate, device_info, lag_to_seconds
-from waveform_cache import cached_load_wav
+
 
 
 def load_config(path: str) -> dict:
@@ -126,9 +126,9 @@ class SyncWindow(QtWidgets.QMainWindow):
 
         # load
         print(f"Loading {a_path}")
-        self.a, self.sr_a = cached_load_wav(a_path, target_sr=sr)
+        self.a, self.sr_a = load_wav(a_path, target_sr=sr)
         print(f"Loading {b_path}")
-        self.b, self.sr_b = cached_load_wav(b_path, target_sr=sr)
+        self.b, self.sr_b = load_wav(b_path, target_sr=sr)
         # keep originals for lag apply
         self.a_orig = self.a.copy()
         self.b_orig = self.b.copy()
@@ -523,6 +523,7 @@ def main():
         print(f"ERROR: B not found {b_path}", file=sys.stderr); sys.exit(1)
 
     app = QtWidgets.QApplication(sys.argv)
+    signal.signal(signal.SIGINT, signal.SIG_DFL)
     # Dark theme: Fusion style + dark palette (works without kvantum)
     app.setStyle("Fusion")
     dark = QtGui.QPalette()