--scale <arg>      scale input (multiply PCM data) by <arg>
--ath-adjust n     ATH auto adjust types 1-3, else no adjustment
--adapt-thres-type n  n=1 total energy or n=2 approximated loudness
--adapt-thres-level x  ??
--cwlimit <freq>    compute tonality up to freq (in kHz) default 8.8717
--ns-sfb21 x      change ns-treble by x dB for sfb21
-X n          selects between different noise measurements
-Y           lets LAME ignore noise in sfb21, like in CBR
-Z           toggles the scalefac feature on/off