m4awrite - write m4a format audio file

m4awrite writes an m4a (MPEG4 audio) format file using an external faac binary

m4awrite is a drop-in replacement for wavwrite that will write MPEG4 Audio-format files by piping the output through an external "faac" binary. It accepts the same syntax and options as wavread. It works best in conjunction with the popenw MEX extension,
http://www.mathworks.com/matlabcentral/fileexchange/13851

It requires an external faac binary, available from
http://www.audiocoding.com/faac.html