Exact Audio Copy

AAC better results with built in AAC library. cut at 17500 actually cuts at 18k

-i  %source% -c:a aac -b:a 256k -cutoff 17500 -metadata title="%title%" -metadata artist="%artist%" -metadata album="%albumtitle%" -metadata year="%year%" -metadata date="%year%" -metadata genre="%genre%" -metadata track="%tracknr%" -metadata composer="%composer%" -metadata performer="%albuminterpret%" -metadata comment="%comment%" %dest%

FFMPEG Fdk_AAC for low bitrate

he-aac-v2 stereo 43 or 35 kbps best compromise

dfg

extension m4a

he-aac  mono 27 kbps

-i  %source% -c:a libfdk_aac -profile:a aac_he -ac 1 -b:a 27k -metadata title="%title%" -metadata artist="%artist%" -metadata album="%albumtitle%" -metadata year="%year%" -metadata date="%year%" -metadata genre="%genre%" -metadata track="%tracknr%" -metadata composer="%composer%" -metadata performer="%albuminterpret%" -metadata comment="%comment%" %dest%

MP3  320 kbps, cutoff 18kHz  ( near lossless )

-i  %source% -c:a libmp3lame -b:a 320k -cutoff 18000 -metadata title="%title%" -metadata artist="%artist%" -metadata album="%albumtitle%" -metadata year="%year%" -metadata date="%year%" -metadata genre="%genre%" -metadata track="%tracknr%" -metadata composer="%composer%" -metadata performer="%albuminterpret%" -metadata comment="%comment%" %dest%

OPUS 192 kbps (near lossless)

-i  %source% -c:a libopus -b:a 192k -metadata title="%title%" -metadata artist="%artist%" -metadata album="%albumtitle%" -metadata year="%year%" -metadata date="%year%" -metadata genre="%genre%" -metadata track="%tracknr%" -metadata composer="%composer%" -metadata performer="%albuminterpret%" -metadata comment="%comment%" %dest%

 

NERO AAC 256 kbps cutoff 18 kHz (near lossless)

FDK_AAC 256 kbps cutoff 18 kHz (near lossless)

FDK_AAC_HE 27 kbps mono africa

FDK_AAC_HE_V2 48kbps stereo africa

FLAC

You need the FLAC.exe encoder and the following additional command line options:

-8 -V -T "ARTIST=%artist%" -T "TITLE=%title%" -T "ALBUM=%albumtitle%" -T "DATE=%year%" -T "TRACKNUMBER=%tracknr%" -T "GENRE=%genre%" -T "COMMENT=%comment%" -T "BAND=%albuminterpret%" -T "ALBUMARTIST=%albuminterpret%" -T "COMPOSER=%composer%" %haslyrics%--tag-from-file=LYRICS="%lyricsfile%"%haslyrics% -T "DISCNUMBER=%cdnumber%" -T "TOTALDISCS=%totalcds%" -T "TOTALTRACKS=%numtracks%" %hascover%--picture="%coverfile%"%hascover% %source% -o %dest%