Because some audio codecs have multiple formats, the Audio panel has options for the codec and its format. Use the Codec drop-down list to select an audio codec. If the codec has multiple formats, use the Format drop-down list to select the amount or type of compression.
The format of a codec is the sampling rate (in kilohertz [KHz] or hertz [Hz]) and sample depth (in bits). The larger the sampling rate and sample depth, the more information is recorded. When more information is recorded, the audio content usually sounds better; however, the audio portion of the total bandwidth allocated also is larger. Remember that the audio file must share the bandwidth with any video or script commands.
Select the Use Video check box if the template will be used to encode video content. Choose a video codec from the Codec drop-down list. Be sure to select a codec that can share the bandwidth with the audio codec you have chosen.