HP 850 - Manual (Page 31)

Chapter 2: Taking pictures and recording video clips 31
Recording audio
You can set the camera to automatically record audio clips that
are attached to the still pictures you take. An audio clip can be
a maximum of 30 seconds long.
1 Set Audio Record to On in the Setup menu. (See Using the
setup menu on page 63.)
2 Press the Shutter button halfway down to begin audio
recording (focus and exposure also lock). A microphone
and audio counter appear at the top of the active display.
3 Press the Shutter button all the way down to take the picture.
4 Continue to hold the Shutter button down to record the
audio clip, then release the Shutter button to stop recording.
Audio recording stops either when you release the Shutter
button, Instant Review ends, the maximum audio clip length of
30 seconds is reached, or the memory card is full, whichever
comes first. You can use Playback to review the audio clips you
have recorded. See Using playback on page 43.