The de-emphasis in mpeg audio is only a flag to indicate if emphasis was
applied on hte source or not, in order to compensate it in the decoder.
There is nothing to do about it in the encoder, except positionning the
flag.
The 2 emphasis types are some kind of boost of high frequencies, in order to
keep a better bandwidth on some analog medias. Those kind of things are used
(with some changes) in Dolby B/C NR, as an example.
But those 2 emphasis (C/5) are now obsolete for a lot of years. This flag
was removed in AAC and mpeg-4.
I was just going to ask Mark to remove this switch as it is totally
obsolete.
Regards,
Gabriel Bouvigne - France
[EMAIL PROTECTED]
icq: 12138873
MP3' Tech: www.mp3tech.org
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