1 files changed, 7 insertions, 1 deletions
diff --git a/src/audio/wav_dump_backend.h b/src/audio/wav_dump_backend.h
index b037fd1..eb6e011 100644
--- a/src/audio/wav_dump_backend.h
+++ b/src/audio/wav_dump_backend.h
@@ -26,8 +26,13 @@ class WavDumpBackend : public AudioBackend {
   // Set output filename (call before init())
   void set_output_file(const char* filename);
 
+  // Set duration in seconds (default: 60s, call before start())
+  void set_duration(float seconds);
+
   // Get total samples written
-  size_t get_samples_written() const { return samples_written_; }
+  size_t get_samples_written() const {
+    return samples_written_;
+  }
 
  private:
   // Write WAV header with known sample count
@@ -41,6 +46,7 @@ class WavDumpBackend : public AudioBackend {
   size_t samples_written_;
   const char* output_filename_;
   bool is_active_;
+  float duration_sec_;
 
   static const int kSampleRate = 32000;
   static const int kBufferSize = 1024;