@item type
Set processing type. Can be @var{time} or @var{freq}. @var{time} is
-processing audio in time domain which is slow.
-@var{freq} is processing audio in frequency domain which is fast.
-Default is @var{freq}.
+processing audio in time domain which is slow but gives high quality output.
+@var{freq} is processing audio in frequency domain which is fast but gives
+mediocre output. Default is @var{freq}.
@item speakers
Set custom positions of virtual loudspeakers. Syntax for this option is: