Binary package “fmit” in ubuntu bionic
Free Music Instrument Tuner
FMIT is a graphical utility for tuning your musical instruments, with
error and volume history and advanced features like microtonal tuning,
statistics, and various views like waveform shape, harmonics ratios and
real-time Discrete Fourier Transform (DFT). All views and advanced features
are optional so that the interface can also be very simple.