diff --git a/Playlist.md b/Playlist.md
index 81eb95b..d53ed08 100644
--- a/Playlist.md
+++ b/Playlist.md
@@ -6,7 +6,7 @@ The file with PPL extension is just text file, you could edit it with any of the
 
 Playlist files are comma delimited and have the following structure:
 
-FREQ,File_PATH,SAMPLE_RATE,PULSE_TIME 
+FREQ,File_PATH,SAMPLE_RATE,PULSE_TIME   
 The unit of PULSE is `ms`, and it's for the pulse before the file at same line.
 
 For example, a valid playlist file could contain:
@@ -15,13 +15,17 @@ For example, a valid playlist file could contain:
 433920000,SAMPLES/TeslaChargePort_EU_AU.C16,500000,50
 ```
 
+
 It will do:  
-Play SAMPLES/TeslaChargePort_US.C16 at 315000000 Hz freq, with 500000 rate  
-pulse 50 ms  
-Play SAMPLES/TeslaChargePort_EU_AU.C16 at 433920000 Hz freq, with 500000 rate  
-over.  
+1. Play SAMPLES/TeslaChargePort_US.C16 at 315000000 Hz freq, with 500000 rate  
+2. pulse 50 ms  
+3. Play SAMPLES/TeslaChargePort_EU_AU.C16 at 433920000 Hz freq, with 500000 rate  
+4. over.  
   
-The LOOP check box is for entire PPL file. 
+The LOOP check box is for the entire PPL file. 
+Once you interrupted the replay, it would start over since the beginning of the list.  
+
+We apologize that we changed the grammar of PPL probably several times, even though we did some compatibility work, for example you actually don't need to specify the delay/pulse timing if you don't need that, still, pls try to use the standard grammar, because it would be hard to take care of all the possible case in limited  code in a very old CPLD. And limited storage.    
 
 [Video demonstration of playlist app](https://user-images.githubusercontent.com/164560/191515258-36621648-3827-4eed-b77b-e8dbaf9be63e.mov)