diff --git a/src/CoreParser.php b/src/CoreParser.php
index 6f6f8ef..c8cbc85 100644
--- a/src/CoreParser.php
+++ b/src/CoreParser.php
@@ -78,9 +78,11 @@ class CoreParser {
         $m->code = ord($payload[$idx]);
         $idx++;
 
+        $m->snr = 0;
+
         if( $m->code == CoreProtocol::RESP_CODE_CHANNEL_MSG_RECV_V3 ) {
-            $m->snr = unpack('V', substr($payload, 1, 4))[1] / 4;
-            $idx = 5;
+            $m->snr = unpack('V', substr($payload, $idx, 4))[1] / 4;
+            $idx += 4;
         }
 
         $m->channel_idx = ord($payload[$idx]);
@@ -89,7 +91,6 @@ class CoreParser {
         $m->timestamp = unpack('V', substr($payload, $idx+3, 4))[1];
         $m->message = substr($payload, $idx+7);
 
-
         return $m;
     }
 
@@ -412,6 +413,7 @@ class CoreParser {
         return $m;
     }
 
+    /*
     public static function parseMessage(string $payload) {
         $data = [
             'code'=>ord($payload[0]),
@@ -424,6 +426,7 @@ class CoreParser {
 
         return $data;
     }
+        */
 
     public static function readCstring($str) {
         $x = strpos($str, "\0");