seth

A command-line tool that turns a stretch of any audio or video file into waveform art. ffmpeg cuts the clip to mono 44.1 kHz and keeps it as a WAV, so you can hear exactly what was drawn; an optional fourth-order Butterworth low- or high-pass shapes it first; matplotlib draws the amplitude envelope to transparent SVG. One run writes eleven variations: lines, filled blobs and bars, jagged or smoothed, at low, mid and high density, plus log-scaled versions that make loud peaks stand out. Rotation, scale, color and cutoff are flags.