Writing wav files to disk

The writewav command writes wav files to disk.

writewav takes two arguments:
- filename, a string containing a file name.
- A, an audio clip object.
writewav(filename,A) writes the clip A as a wav file named filename.
It returns 1 on success and 0 on failure.

s:=createwav(sin(2*pi*440*soundsec(1))):; writewav("sounds/sine.wav",s)

The sounds directory now contains the file sine.wav.