rvsttd: 5ms fade-out on debug WAV to eliminate trailing click

rvsttd/src/main.rs

@@ -113,7 +113,17 @@ impl DebugRecorder {
         self.audio.extend_from_slice(samples);
     }
 
-    fn save(self) {
+    fn save(mut self) {
+        // Apply 5ms fade-out to the end to avoid click at the trailing edge
+        let fade_samples = (SAMPLE_RATE as usize * 5) / 1000; // 5ms
+        if self.audio.len() > fade_samples {
+            let start = self.audio.len() - fade_samples;
+            for i in 0..fade_samples {
+                let t = 1.0 - (i as f32 / fade_samples as f32);
+                self.audio[start + i] *= t;
+            }
+        }
+
         // Write log
         let log_path = self.dir.join("session.log");
         match std::fs::File::create(&log_path) {