At the 5D the sound may be muted automatically, on a videocam is not that way. As to the monitor the sound is not regulated, it does not switch off can also be, of course, results in a massive feedback. ADDENDUM: It has found out that the sound is allowed but regulated, however, is the function of mine - the iMacs unscrewing and technically no upper zero - not found despite intensive searching. Also on the sharpness I was disappointed at the 5D MkII is no significant advantage is the camera screen. At the FDR-AX1 the 7 "are to be able to judge the sharpness too small adequately. The part will be waiting on return, a flop.