[FFmpeg-user] how to encode wav file to mp2 Audio

[a b]

Hello,
using ffmpeg I want to Encode a wave file recorded from a cd to mpeg Audio.
I want to encode it to  MPEG 1  and MPEG 2  with all  Layer 1  and layer 2
and Layer3 modes separately.
mp1 and mp2 layer3 is same as MP3 which is easy to encode, but the problem
is with layer1 and layer2  , and I want to know how to set the command and
related options to do so.
what is the  command to Encode the wave file to above coding modes and
options.
thanks much