AttributeError 'fft_window' object has no
attribute 'plot'.
There have been several different "errors" mentioned recently - the
above error message sounds familiar - not sure, but this one possibly could
be a GL vs. non-GL issue. There is a config.conf file setting - should be
in the list archives on how to set this (style=nongl or whatever) .
That's exactly the cause of this error. Maybe we need to change some of the
defaults now since GL has been standard for ages, there is no need for any
other vocoder than the soft one and we can weed out some dead code?