  --telephone      lowest quality,       (typ.  32... 48 kbps)
  --thumb          low quality/internet, (typ.  58... 86 kbps)
  --radio          medium (MP3) quality, (typ. 112...152 kbps)
  --standard       high quality (dflt),  (typ. 142...184 kbps)
  --xtreme         extreme high quality, (typ. 168...212 kbps)
  --insane         extreme high quality, (typ. 232...268 kbps)
  --braindead      extreme high quality, (typ. 232...278 kbps)

Audio processing:
  --skip x         skip the first x seconds  (dflt: 0.0)
  --dur x          stop encoding after at most x seconds of encoded audio
  --fade x         fadein+out in seconds
  --fadein x       fadein  in seconds (dflt: 0.0)
  --fadeout x      fadeout in seconds (dflt: 0.0)
  --fadeshape x    fade shape (dflt: 1.0),
                   see http://www.uni-jena.de/~pfk/mpc/img/fade.png
  --scale x        scale input signal by x (dflt: 1.00000)
  --scale x,y      scale input signal, separate for each channel

Expert settings:
==Masking thresholds======
  --quality x      set Quality to x (dflt: 5)
  --nmt x          set NMT value to x dB (dflt:  6.5)
  --tmn x          set TMN value to x dB (dflt: 18.0)
  --pns x          set PNS value to x dB (dflt:  0.0)
==ATH/Bandwidth settings==
  --bw x           maximum bandwidth in Hz (dflt:  0.0 kHz)
  --minSMR x       minimum SMR of x dB over encoded bandwidth (dflt: 1.0)
  --ltq xyy        x=0: ISO threshold in quiet (not recommended)
                   x=1: more sensitive threshold in quiet (Buschmann)
                   x=2: even more sensitive threshold in quiet (Filburt)
                   x=3: Klemm
                   x=4: Buschmann-Klemm Mix
                   x=5: minimum of Klemm and Buschmann (dflt)
                   y=00...99: HF roll-off (00:+30 dB, 99:-30 dB @20 kHz
  --ltq_gain x     add offset of x dB to chosen ltq (dflt: +0.0)
  --ltq_max x      maximum level for ltq (dflt: 76.0 dB)
  --ltq_var x      adaptive threshold in quiet: 0: off, >0: on (dflt: 1)
  --tmpMask x      exploit postmasking: 0: off, 1: on (dflt: 1)
==Stuff settings==========
  --minval x       calculation of MinVal (1:Buschmann, 2,3:Klemm)
