Sony DSC-RX100M4 Instruction Manual page 224

1. MENU→
Menu item details
On:
Sound is output to the external device.
Off:
Sound is not output to the external device.
Note
During HDMI audio output, no electronic sound is produced when performing or ending
movie recording even if [Audio signals] is set to [On].
[191] How to Use
4K Output Sel. (movie)
You can set how to record movies and perform HDMI output when your camera is connected
to external recording/playback devices, etc.
1. Turn the mode dial to
2. Connect the camera to the desired device via an HDMI cable.
3. MENU→
Menu item details
Memory Card+HDMI:
Simultaneously outputs to the external recording/playback device and records on the
camera's memory card.
HDMI Only(30p):
Outputs a 4K movie in 30p to the external recording/playback device without recording on
the camera's memory card.
HDMI Only(24p):
Outputs a 4K movie in 24p to the external recording/playback device without recording on
the camera's memory card.
HDMI Only(25p)*:
Outputs a 4K movie in 25p to the external recording/playback device without recording on
the camera's memory card.
(Setup)→[HDMI Settings]→[
Changing settings
(movie).
4K Output Sel.]→desired setting.
(Setup)→[
HDMI Audio Out.]→desired setting.
Setup menu