Adding flag for file writting recording case

lerobot/common/robot_devices/microphones/microphone.py

@@ -158,6 +158,7 @@ class Microphone:
         self.logs = {}
         self.is_connected = False
         self.is_recording = False
+        self.is_writing = False
 
     def connect(self) -> None:
         if self.is_connected:
@@ -220,6 +221,7 @@ class Microphone:
             logging.warning(status)
         # Slicing makes copy unecessary 
         # Two separate queues are necessary because .get() also pops the data from the queue
+        if self.is_writing:
             self.record_queue.put(indata[:,self.channels])
         self.read_queue.put(indata[:,self.channels])
 
@@ -301,6 +303,8 @@ class Microphone:
             self.record_thread.daemon = True
             self.record_thread.start()
 
+            self.is_writing = True
+            
         self.is_recording = True
         self.stream.start()