ifilename -- the output file's name (in double-quotes).
iformat -- a flag to choose output file format:
0 - 32-bit floating point samples without header (binary PCM multichannel file)
1 - 16-bit integers without header (binary PCM multichannel file)
2 - 16-bit integers with .wav type header (Microsoft WAV mono or stereo file)
kout1,...koutN -- control-rate signals to be written to the file
foutk operates in the same way as fout, but with k-rate signals. iformat can be set only to 0 or 1.
Notice that fout and foutk can use either a string containing a file pathname, or a handle-number generated by fiopen. Whereas, with fouti and foutir, the target file can be only specified by means of a handle-number.