Command-line encoder that outputs aacPlus v2 files (ie. Advanced Audio Coding +
Spectral Band Resonation + Parametric Stereo, or AAC + SBR + PS), also known as
HE-AAC+ (High Efficiency AAC+). Developed by Coding Technologies, based on the
reference code obtained from 3GPP, repackaged to compile on contemporary Linux
by Matteo Croce.