sparkline.cc
text-mode data visualization — unicode characters, not pixels
01 — aural cortex
audio-reactive equalizer — block characters
braille oscilloscope — 3-band overlay (32×128) — bass mid treble
02 — contour trace
continuous waveform — unicode contour characters
character palette: ⎽ ⎼ ⎻ ⎺ / ╱ \ ╲ ▔ ﹀ ︿ ︺ ︹ — 4-level scan lines + diagonal transitions
03 — braille plot
high-resolution dot matrix — 2×4 braille patterns (256 glyphs)
04 — block spectrum
vertical bar chart — 8-level block elements ▁▂▃▄▅▆▇█
05 — density field
2D heatmap — character density mapping
06 — live atlas
domain traffic sparklines — real network data