aacgain version 1.9.0, derived from mp3gain version 1.5.2
copyright(c) 2001-2009 by Glen Sawyer
AAC support copyright(c) 2004-2009 David Lasker, Altos Design, Inc.
uses mpglib, which can be found at http://www.mpg123.de
AAC support uses faad2 (http://www.audiocoding.com), and
mpeg4ip's mp4v2 (http://www.mpeg4ip.net)
Usage: aacgain.exe [options] <infile> [<infile 2> ...]
options:
	/v - show version number
	/g <i>  - apply gain i without doing any analysis
	/l 0 <i> - apply gain i to channel 0 (left channel)
	          without doing any analysis (ONLY works for STEREO files,
	          not Joint Stereo)
	/l 1 <i> - apply gain i to channel 1 (right channel)
	/e - skip Album analysis, even if multiple files listed
	/r - apply Track gain automatically (all files set to equal loudness)
	/k - automatically lower Track/Album gain to not clip audio
	/a - apply Album gain automatically (files are all from the same
	              album: a single gain change is applied to all files, so
	              their loudness relative to each other remains unchanged,
	              but the average album loudness is normalized)
	/m <i> - modify suggested MP3 gain by integer i
	/d <n> - modify suggested dB gain by floating-point n
	/c - ignore clipping warning when applying gain
	/o - output is a database-friendly tab-delimited list
	/t - writes modified data to temp file, then deletes original
	     instead of modifying bytes in original file
	     A temp file is always used for AAC files.
	/q - Quiet mode: no status messages
	/p - Preserve original file timestamp
	/x - Only find max. amplitude of file
	/f - Assume input file is an MPEG 2 Layer III file
	     (i.e. don't check for mis-named Layer I or Layer II files)
	      This option is ignored for AAC files.
	/? or /h - show this message
	/s c - only check stored tag info (no other processing)
	/s d - delete stored tag info (no other processing)
	/s s - skip (ignore) stored tag info (do not read or write tags)
	/s r - force re-calculation (do not read tag info)
	/s i - use ID3v2 tag for MP3 gain info
	/s a - use APE tag for MP3 gain info (default)
	/u - undo changes made (based on stored tag info)
	/w - "wrap" gain change if gain+change > 255 or gain+change < 0
	      MP3 only. (use "/? wrap" switch for a complete explanation)
If you specify /r and /a, only the second one will work
If you do not specify /c, the program will stop and ask before
     applying gain change to a file that might clip
