diff --git a/components/media_player/i2s_audio.rst b/components/media_player/i2s_audio.rst
index ceb0e1f2e..68bd4f3f1 100644
--- a/components/media_player/i2s_audio.rst
+++ b/components/media_player/i2s_audio.rst
@@ -35,6 +35,9 @@ External DAC
 - **mute_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The GPIO pin to use to mute the media player.
 - **mode** (*Optional*, string): The mode of the I²S bus. Can be ``mono`` or ``stereo``. Defaults to ``mono``.
 - **i2s_audio_id** (*Optional*, :ref:`config-id`): The ID of the :ref:`I²S Audio <i2s_audio>` you wish to use for this media player.
+- **i2s_comm_fmt** (*Optional*, string): I2S communication format. By default MSB format is used (AC101, PCM5102A). 
+  Set to ``lsb`` if using an external DAC that uses Japanese (Least Significant Bit Justified) format (like PT8211). 
+  Can be ``msb`` or ``lsb``. Defaults to ``msb``.
 
 For best results, keep the wires as short as possible.