qaac 2.15 Usage: qaac [options] infiles.... "-" as infile means stdin. On ADTS/WAV output mode, "-" as outfile means stdout. Main options: --formats Show available AAC formats and exit -a, --abr AAC ABR mode / bitrate -V, --tvbr AAC True VBR mode / quality [0-127] -v, --cvbr AAC Constrained VBR mode / bitrate -c, --cbr AAC CBR mode / bitrate For -a, -v, -c, "0" as bitrate means "highest". Highest bitrate available is automatically chosen. For LC, default is -V90 For HE, default is -v0 --he HE AAC mode (TVBR is not available) -q, --quality AAC encoding Quality [0-2] --adts ADTS output (AAC only) -A, --alac ALAC encoding mode -d Output directory. Default is current working dir. --check Show library versions and exit. -D, --decode Wave output mode. -r, --rate keep: output sampling rate will be same as input if possible. auto: output sampling rate will be automatically chosen by encoder. n: desired output sampling rate in Hz. --lowpass Specify lowpass filter cut-off frequency in Hz. Use this when you want lower cut-off than Apple default. -b, --bits-per-sample Bits per sample of output (for WAV/ALAC only) --no-dither Turn off dither when quantizing to lower bit depth. --gain Adjust gain by f dB. Use negative value to decrese gain, when you want to avoid clipping introduced by DSP. -N, --normalize Normalize (works in two pass. generates HUGE tempfile for large input) --delay <[[hh:]mm:]ss[.ss..]|ns> Specify delay either by time or number of samples. When positive value is given, prepend silence at the begining to achieve delay of specified amount.