The aim of auch (audio-checker) is to visualize harmonics in musical recordings. Many tools show the spectrum, but this tool focuses on one or two specific octaves, with an indication of the tonica, sub-dominant(IV), and dominant(V). This way, notes, chords, and harmonics in a musical piece become clearer. It also supports other types of transformation (like wavelets, surface waves, strings, resampling, etc). Another feature is that this tool can compare incoming and outgoing audio to test external filters. License: GNU General Public License (GPL) Changes:
This version adds the visualization of the propagation of waves on a rope and "ether" (a different type of medium).