my $csv = Text::CSV_XS->new ({
    sep_char    => "\x{14}",
    quote_char  => "\x{fe}",
    escape_char => undef,
    binary      => 1,
    auto_diag   => 1,
    });
while (my $row = $csv->getline ($fh)) {
    tr/\x{ae}/\n/ for @$row;
    # continue as usual
    }