[LAU] render a spectrogram with logarithmic frequency axis from bash

[Peter P.]

Hi list,

I am trying to render a spectrogram from a soundfile as I would do using
the SoX spectrogram effect, or sndfile-spectrogram from sndfile-tools
but with a logarithmic frequency axis. It is alright if the analysis
remains linear, but the plotting should be done in log.  Is there any
solution that can be used on a shell without gui, and that is slightly
less work than writing it in Octave?

Thank you for all recommendations!
best, Peter