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The 'joint stereo' mode usually gives better compression performance, but some claim it will damage important phase-coherence in Dolby ProLogic encoded material.įor Awave Audio you furthermore select if you want energy levels to be stored in the 'frame aux-field'.
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Awave Studio: 'ID3 v1 meta info tags' and/or 'APE meta info tags' can be written - select what you prefer on the 'Format options' tab in the program settings.'ID3 v1 meta info tags', 'ID2 v2 meta info tags' and 'APE meta info tags' are all read if present.Meta info: It's not an official part of any of the MPEG specifications, but there's several de-facto 'standards' for adding meta-info structures to.Also, version 3.94 or later is required for writing 8/11/12 kHz files. Also note that you need Lame_Enc.dll version 3.92 or later to use average bit rate encoding. Note that some MP3 decoders only support constant bit rate files. This is the optimal way to compress the audio! Variable Bit Rate: This let's you specify a 'quality level' and the encoder then varies the bit rate so as to always achieve at least that given quality, without any concerns about what the total file size may end up being.The encoder then 'portions out' the total amount of available bits in variable amounts to different parts of the audio clip in such a manner as it thinks will produce the best overall audio quality. Average Bit Rate: This let's you (indirectly) specify the total size of the output file (file size = audio length * bit rate).Constant Bit Rate: This is the simplest strategy and always uses the same amount of bits per time unit.Bit rate formats: When writing, you have 3 different output format selections to choose from, each selecting a different encoding bit-rate allocation strategy:.The MPEG-layer number (I, II, or III) indicates the compression algorithm that is used (with layer I the least complex, and layer III the most complex algorithm).The MPEG-version number (1, 2, or the unofficial "2½") only indicates the allowed sample rates.These files can't always be auto-detected reliably so be sure to use any of the above file extensions.
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MPEG-1/2/2½ audio layer I / II / III streams