diff --git a/scripts/led-matrix-viz.py b/scripts/led-matrix-viz.py
index 83693c7..19d2dab 100644
--- a/scripts/led-matrix-viz.py
+++ b/scripts/led-matrix-viz.py
@@ -74,12 +74,14 @@ def main():
 
     frames_sent = 0
     frames_dropped = 0
+    bytes_received = 0
 
     last_refresh = time.monotonic()
     stats_last_write = time.monotonic()
     fps_sample_start = time.monotonic()
     fps_sample_frames = 0
     events_processed = 0
+    raw_packets = 0
 
     while True:
         now = time.monotonic()
@@ -94,8 +96,10 @@ def main():
             if fd == sock.fileno() and (flags & POLLIN):
                 try:
                     while True:
-                        data, _ = sock.recvfrom(SOCK_BUFFER)
+                        data, addr = sock.recvfrom(SOCK_BUFFER)
                         buf += data
+                        bytes_received += len(data)
+                        raw_packets += 1
                 except BlockingIOError:
                     pass
 
@@ -149,14 +153,14 @@ def main():
 
             if now - stats_last_write >= 2.0:
                 fps = fps_sample_frames / (now - fps_sample_start) if (now - fps_sample_start) > 0 else 0
-                _write_stats(frames_sent, frames_dropped, fps, len(active_notes), events_processed)
+                _write_stats(frames_sent, frames_dropped, fps, len(active_notes), events_processed, bytes_received, raw_packets)
                 stats_last_write = now
                 fps_sample_start = now
                 fps_sample_frames = 0
                 events_processed = 0
 
 
-def _write_stats(sent, dropped, fps, active_count, events):
+def _write_stats(sent, dropped, fps, active_count, events, bytes_rcv, packets):
     import json
     try:
         with open(STATS_FILE, "w") as f:
@@ -166,6 +170,8 @@ def _write_stats(sent, dropped, fps, active_count, events):
                 "fps": round(fps, 1),
                 "active_notes": active_count,
                 "midi_events": events,
+                "bytes_received": bytes_rcv,
+                "raw_packets": packets,
                 "ts": time.time()
             }, f)
     except OSError: