Visual thumbnails & posters
Every track becomes one card: a main representation, a title bar (track,
album, duration, key · bpm when a features.json exists), and a waveform
strip. Sixteen styles, chosen with --style; albums additionally get
contact sheets. All examples below are rendered from a small synthetic
demo collection (arpeggios, drones, strummed chords).
musiscape thumbnails <folder> --style combo
Spectrogram family
mel (default) — timbre and texture; chroma — harmony over time;
tempo — rhythmic periodicity; combo — all three stacked:

Color codes
barcode — each moment's hue is its position on the circle of fifths,
saturation its tonal focus, brightness its loudness:

wave — Freesound-style: the amplitude envelope colored by spectral
centroid (dark blue = dark timbre, red = bright):

Structure
ssm — self-similarity matrix: musical form as texture.
keyscape — Sapp-style triangle: every window at every time scale
colored by its key (hue = tonic on the fifths circle, light = major,
dark = minor). arcs — Shape-of-Song repetition arcs:

Circular forms
vinyl — the track as a tonality disc (one revolution, harmony as hue,
loudness as radius) with the Freesound waveform underneath. spiral —
time-integrated energy on the Shepard helix (angle = pitch class, radius =
octave — the only view that shows register). tonnetz — the harmony's
path on the circle-of-fifths plane:

Rhythm
rhythm — a Poincaré portrait of successive inter-onset intervals
(metric playing collapses to points, rubato spreads into clouds), with a
beat-wheel inset: onset phases on the dominant-period circle and the
pulse-clarity resultant arrow:

Schaeffer cards
See Schaeffer cards for the schaeffer (TARTYP) and
tarsom styles.
Posters
musiscape poster <folder> # stacked harmony barcodes
musiscape poster <folder> --style vinyl # grid of tonality discs

Albums read as color families: a harmonically coherent album shares hues, a wandering one doesn't, and weakly tonal material (drones) washes out to low saturation.