Each visualizer style's settings page has a Preset drop-down and a
"Save as Preset…" button. The drop-down lists the built-in Default, your
presets, and "Edit Presets…" (rename in place, delete); it reads "Custom"
whenever the settings match no preset. Presets sync with the preferences;
the per-machine sync delay is never part of one.
Laser: a two-handle "Speaker range" sets what the speaker under the mirror
plays (36 dB/octave edges; the noise floor is measured per range so treble
alone still shows). Bass-only gives clean loops; treble-only is a shimmer
along one line, as a membrane far above its resonances really draws.
The afterimage is now a phosphor buffer, dimmed each frame and rounded
down so it always fades to nothing — constant cost however long the fade
(drawing every past sweep ran the big window past a frame).
Line width is a number box stepping by 0.5; radial dots have a size slider.
Sync: decoding runs ahead of the speakers — by up to ~0.8 s after a GUI
stall, when buffers arrive in a burst — and the visualizer drew the newest
audio. It now keeps timestamped history and draws what the player says is
playing, plus a per-machine Sync delay (config.json) for latency Qt can't
see, like Bluetooth.
Every style has one Fade slider (0 = off); bars now leave fading steps.
Laser: afterimage time, line width down to 1 px, glow on/off, tip dot
on/off and size (a resting beam always shows its dot), and an oscilloscope
dot grid under the beam. Visualizer sliders run the full window width.
Highlight: click a swatch for a full color picker; the color picked
replaces that slot (right-click restores it).
Laser: the screen's distance, pitch, yaw and roll are sliders (the beam ray
is intersected with the turned screen; the drawing shrinks only when a
steep screen would push the figure out of view), and the afterimage can be
turned off. The membrane is now a slack 50 Hz balloon whose split rocking
pairs land in the bass, so it draws loops ~60% of the time instead of ~25%.
Radial: fading trails can be turned off; the number of frequency bands and
volume steps are sliders; ghosts fade from the dot's own color into the
background; a 4096-point FFT and interpolation end the flat bass arcs; and
"Even out bass and treble" takes the song's overall tilt out so the dots
sit on a circle.
Preferences → Appearance → Visualizer picks Bars (as before), Radial dots
(the EQ in a circle: angle is frequency, radius is volume, moving dots
leave light-gray ghosts that fade over a set time), or Laser (a mirror on
a speaker membrane bouncing a beam onto a screen: simulated membrane
modes, D·tan(2θ) reflection, dwell-weighted brightness). Double-clicking
the panel opens it big; a click closes it.
trav