Procs

proc what(filename: string): tuple[filetype: string, framerate, nchannels,
    nframes, sampwidth: int] {....raises: [Exception, ValueError, OSError, IOError,
                                        EOFError, KeyError], tags: [RootEffect].}

proc whathdr(filename: string): tuple[filetype: string, framerate, nchannels,
    nframes, sampwidth: int] {....raises: [Exception, ValueError, OSError, IOError,
                                        EOFError, KeyError], tags: [RootEffect].}