To delete attached voice memo:
Set the camera to Playback mode 1.  .
View images/videos/audio clips in Single navigation mode.2. 
Use the 3. 
 or   keys to scroll until the desired image with voice 
memo is displayed on the screen.
Press 4.  Menu button 
 to launch the Playback Menu.
Use the 5. 
 or   keys to move through the Playback menu 
selections then select Delete.
From the Delete submenu, select 6.  Voice only.
A confirmation selection appears, select 7.  Delete.
Press the 8.  OK button 
 to delete the attached voice memo and go back to Playback mode.
The Voice Memo submenu is disabled if the current image displayed, at the time you 
access the Delete menu, does not have any attached voice memo.
To delete multiple les:
Select 1.  Multi in the Delete submenu, the images are displayed in 
thumbnail view on the LCD monitor. 
Use the navigation control to move through the files.2. 
When the desired image/video/audio clip is highlighted, press 3. 
the OK button 
 to mark image/video/audio clip for 
deletion.
Repeat step 3 until all desired images for deletion are marked.4. 
Press the 5.  Menu button  . A confirmation selection appears.
Select Yes to confirm.6. 
Press the 7.  OK button 
 to delete marked files.
To delete all les:
Select 1.  All in the Delete submenu. A confirmation message 
appears. 
Select 2.  Yes.
Press the 3.  OK button 
 to delete all files.