##
19.4.2 AU_write Objects

AU_write objects, as returned by `open()` above, have the following methods:

`setnchannels`( | n)

  Set the number of channels.

`setsampwidth`( | n)

  Set the sample width (in bytes.)

`setframerate`( | n)

  Set the frame rate.

`setnframes`( | n)

  Set the number of frames. This can be later changed, when and if more frames are written.

`setcomptype`( | type, name)

  Set the compression type and description. Only `'NONE'` and `'ULAW'` are supported on output.

`setparams`( | tuple)

  The tuple should be `(nchannels, sampwidth, framerate, nframes, comptype, compname)`, with values valid for the `set*()` methods. Set all parameters.

`tell`( | )

  Return current position in the file, with the same disclaimer for the `AU_read.tell()` and `AU_read.setpos()` methods.

`writeframesraw`( | data)

  Write audio frames, without correcting nframes.

`writeframes`( | data)

  Write audio frames and make sure nframes is correct.

`close`( | )

  Make sure nframes is correct, and close the file.

  This method is called upon deletion.

Note that it is invalid to set any parameters after calling `writeframes()` or `writeframesraw()`.