Autodesk 64006-051108-9001 User Guide - Page 207

Audio Tab 199 Apple Lossless A lossless codec used for editing or transcoding digital music. ALaw 2:1 A legacy codec used for speech. IMA 4:1 Interactive Multimedia Association standard compressor. Good for playback on low performance target computers. MPEG-4 Audio AAC - A high-quality general-purpose wideband audio encoding that compresses more efficiently than older formats. Always in VBR mode. QuickTime 6 or later required. AMR Narrowband A variable bitrate codec used for 3G wireless systems. µLaw 2:1 Another legacy codec used for speech. MP3 A high-quality general-purpose codec that uses perceptual coding techniques based on the way the human ear perceives sound. You can compress at 12:1 without losing significant sound quality. Sample Rate Enable to set the sample rate (the number of samples per second) used to reproduce the audio. The highest frequency that can be reproduced is half the sample rate. Some common sample rates are: • 32 kHz - For lower data rate audio • 44.1 kHz - For "cd quality" audio • 48 kHz - Required for DVD Data Rate (only for MP3, MPEG Layer 1, MPEG Layer 2) Set the data rate. The higher the data rate, the higher the quality and the larger the output file.