28Configure the settings relating to audio [Audio]Click the [Audio] tab on the "Image/Audio" page. ( pages 4 and 5: How to display/operate the setup menu)The settings relating to audio can be configured on this page.Notes:• Images and audio will not be synchronized. Therefore, images and audio may not always match.• Audio may be interrupted depending on the network environment.[Audio transmission/reception]Select the communication mode used for audio datatransmission/reception between the camera and the PCfrom the following.Off: Does not receive/transmit audio between the cam-era and the PC. Therefore, the settings and controlsrelating to audio will be invalidated.Mic input: The PC receives audio data from the cam-era. Audio can be heard with images on the PC.Images and audio will not be synchronized.Audio output: Audio data from the PC will be transmit-ted to the camera. Audio can be heard from thespeaker connected to the camera.Interactive (half duplex): Both reception and transmis-sion are available. However, audio data cannotsimultaneously be transmitted and received.Interactive (full duplex): Both reception and transmis-sion are simultaneously available.Note:Howling may be generated depending on usageconditions. If howling is generated, prevent soundgenerated by the PC from entering the PC micro-phone.Default: OffNote:When "Multicast" is selected for "Transmission type"of "MPEG-4" in the "MPEG-4" section of the [JPEG/MPEG-4] tab of the "Image/Audio" page ( page21), it is impossible to carry out the audio transmis-sion/reception while monitoring MPEG-4 image.To carry out the audio transmission/reception, clickthe [JPEG] button on the "Live" page.[Audio bit rate]Select "16 kbps" or "32 kbps" for the audio bit rate usedto transmit/receive audio data.Default: 32 kbpsNote:When selecting a smaller value for "Bandwidth con-trol(bit rate)" ( page 46) while putting a priority onthe JPEG/MPEG-4 image transmission, select "16kbps" for "Audio bit rate".[Mic input volume (Camera to PC)]Select a volume level on the PC to hear audio transmit-ted from the camera.High/Middle/LowDefault: Middle[Mic input interval (Camera to PC)]Select an interval for audio reception from the following.20 msec/40 msec/80 msec/160 msecDefault: 40 msecNote:When a shorter interval is selected, the delay timewill be shorter. When a longer interval is selected,audio interruption may be diminished even thoughthe delay time will be longer.Select the interval according to the network environ-ment.