songsee

• Spectrogram:

  songsee track.mp3

• Multi-panel:

  songsee track.mp3 --viz spectrogram,mel,chroma,hpss,selfsim,loudness,tempogram,mfcc,flux

• Time slice:

  songsee track.mp3 --start 12.5 --duration 8 -o slice.jpg

• Stdin:

  cat track.mp3 | songsee - --format png -o out.png

• --viz

  list (repeatable or comma-separated)

• --style

  palette (classic, magma, inferno, viridis, gray)

• --width

  /

  --height

  output size

• --window

  /

  --hop

  FFT settings

• --min-freq

  /

  --max-freq

  frequency range

• --start

  /

  --duration

  time slice

• --format

  jpg|png

• WAV/MP3 decode native; other formats use ffmpeg if available.
• Multiple

  --viz

  renders a grid.