AmigActive 26/AACD 26.iso/AACD/Magazine/CDRipping/Normalize/normalize.doc

Text File | 2001-01-31 | 5.6 KB | 200 lines

NORMALIZE(1)                                         NORMALIZE(1)


NNAAMMEE
       normalize - adjusts volume levels of audio files.


SSYYNNOOPPSSIISS
       nnoorrmmaalliizzee [options] [--] file [...]


DDEESSCCRRIIPPTTIIOONN
       nnoorrmmaalliizzee is used to adjust the volume of wav audio files
       to a standard volume level.  This is useful for things
       like creating mp3 mixes, where different recording levels
       on different albums can cause the volume to vary greatly
       from song to song.

       nnoorrmmaalliizzee operates in two phases.  In the first phase, it
       analyzes the specified files as wav audio files, and com-
       putes the volume of each file.  In the second phase, it
       applies a volume adjustment to each file to set each
       file's volume to a standard level.

       As a special case, the filename "-" will cause nnoorrmmaalliizzee
       to read audio data from standard input.  The data is
       assumed to be 44.1 kHz, 16 bit, stereo PCM data (i.e.
       without a WAV header).  If standard input is specified as
       a file, the --nn option is implied.


OOPPTTIIOONNSS
       --aa, ----aammpplliittuuddee=_A_M_P_L_I_T_U_D_E
           Adjust the RMS volume to the target amplitude AMPLI-
           TUDE; must be between 0.0 and 1.0.  The default is
           0.25.

       --bb, ----bbaattcchh
           Enable batch mode: see BBAATTCCHH MMOODDEE, below.

       --mm, ----mmiixx
           Enable mix mode: see MMIIXX MMOODDEE, below.  Batch mode and
           mix mode are mutually exclusive.

       --gg, ----ggaaiinn=_G_A_I_N
           Skip the volume computation phase, and don't compute
           the volume adjustment from the current volumes of the
           files.  Instead, just apply the given gain as a volume
           adjustment to the files.  As a plain number this is
           just a multiplier applied to all samples, If a number
           suffixed by "dB" is specified, all volumes are
           adjusted by that many decibels.

       --hh, ----hheellpp
           Display usage information and exit.





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NORMALIZE(1)                                         NORMALIZE(1)


       --nn, ----nnoo--aaddjjuusstt
           Compute and output the volume adjustment that would
           set the volume to target, but don't apply it to any of
           the files (i.e. skip the second phase).  If you use
           this option, your files will not be altered in any
           way.

       --qq, ----qquuiieett
           Don't output progress information.  Only error mes-
           sages are printed.

       --tt, ----tthhrreesshhoolldd=_T_H_R_E_S_H_O_L_D
           In batch mode (see BBAATTCCHH MMOODDEE, below), when averaging
           volume levels, throw out any volumes that are more
           than THRESHOLD decibels from the average.  A high
           value here (say, 50) will make sure that the volumes
           of all files are considered in the average.

       --vv, ----vveerrbboossee
           Increase verbosity.  This option can be repeated for
           more messages.

       --VV, ----vveerrssiioonn
           Print version information and exit.


MMIIXX MMOODDEE
       This mode is made especially for making mixed CD's and the
       like.  You want every song on the mix to be the same vol-
       ume, but it doesn't matter if they are the same volume as
       the songs on some other mix you made last week.  In mix
       mode, average level of all the files is computed, and each
       file is normalized to this average volume.


BBAATTCCHH MMOODDEE
       When operating on a group of unrelated files, you usually
       want all of them at the same level, and this is the
       default behavior.  However, a group of music files all
       from the same album is generally meant to be listened to
       at the relative volumes they were recorded at.  In batch
       mode, all the specified files are considered to be part of
       a single album and their relative volumes are preserved.
       This is done by averaging the volumes of all the files,
       computing a single adjustment from that, and applying the
       same adjustment to all the files.  Some analysis is also
       done so that files with volumes that appear to be statis-
       tical aberrations are not considered in the average.  This
       is useful if you have albums (like many of the author's)
       in which there is one "quiet song" that throws off the
       average.






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NORMALIZE(1)                                         NORMALIZE(1)


BBUUGGSS
       If excessive clipping occurs when applying a volume
       adjustment to a file, a warning is printed but the adjust-
       ment is still applied.  The only way around this currently
       is to back up unrecoverable files before running nnoorrmmaalliizzee
       (which you should probably do anyway).

       The French message translations are very bad.  Apologies
       to French speakers for my high school French plus
       babelfish translations.


AAUUTTHHOORR
       Chris Vaill <[e-mail]>
       Compiled under Amiga by Fr3dY <[e-mail]>

SSEEEE AALLSSOO
       ssooxx((11))








































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