Cannot build examples

[reahari]

I am trying to build the examples but running make in the examples directory returns:

bc2midi entchen.abc 0 -o entchen.mid
4.84 January 20 2023 abc2midi
writing MIDI file entchen.mid
mkdir -p cache
../ecantorix.pl -C entchen.conf -c cache -O wav -o entchen.wav entchen.mid > entchen.ass
Can't locate Math/FFT.pm in @INC (you may need to install the Math::FFT module) (@INC contains: /home/$USER/Desktop/ecantorix /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.36.0 /usr/local/share/perl/5.36.0 /usr/lib/x86_64-linux-gnu/perl5/5.36 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl-base /usr/lib/x86_64-linux-gnu/perl/5.36 /usr/share/perl/5.36 /usr/local/lib/site_perl) at ../ecantorix.pl line 26.
BEGIN failed--compilation aborted at ../ecantorix.pl line 26.
make: *** [Makefile:30: entchen.wav] Error 2
rm entchen.mid

Is there a dependency I'm missing? I can't find a perl package matching math::fft