fix: use correct Buffer API for audio processing

Co-authored-by: aider (deepseek/deepseek-coder) <aider@aider.chat>

src/lib.rs

@@ -102,14 +102,13 @@ impl Plugin for ClipLauncher {
         }
 
         // Process audio
-        for channel in buffer.iter_samples() {
-            let input = channel.inputs;
-            let output = channel.outputs;
-            let num_samples = input.len();
-            
-            // Process this block
-            self.engine.process_audio(input, output, num_samples);
-        }
+        let num_channels = buffer.channels() as usize;
+        let input = buffer.as_slice();
+        let output = buffer.as_mut_slice();
+        let num_frames = input.len() / num_channels;
+        
+        // Process this block
+        self.engine.process_audio(input, output, num_frames);
 
         // Send pending MIDI output events
         for event in self.pending_midi.drain(..) {