default_config.json

// Do not modify this file. If you want to customize the configuration, create a file `config.json` and
// specify only the settings you want to override.
{
    // Optional, string, default: "info".
    // Valid values: "quiet", "error", "warning", "info", "debug", "all" (from quietest to most verbose).
    "log_level": "info",

    // Configuration for the web server.
    // Optional. This whole stanza is optional because none of the keys within it are required.
    "server": {
        // Optional, boolean, default: false. Set to true if you want to run the web server with SSL (https).
        "use_ssl": false,

        // Optional, string, default: "". Only applicable when use_ssl is true.
        "keyfile": "",

        // Optional, string, default: "". Only applicable when use_ssl is true.
        "certfile": "",
    },

    // Configuration used whenever displaying anything on the LEDs.
    // Required. At least one key within this stanza is required.
    "leds": {

        // Required, string. Controls which LED driver is used. Valid values: apa102, rgbmatrix, ws2812b.
        "driver": "",

        // Required, integer. The width of your LED matrix, in pixels.
        "display_width": 0,

        // Required, integer. The height of your LED matrix, in pixels.
        "display_height": 0,

        // Optional, integer, default: 10. Global brightness of LEDs as a percentage [0, 100].
        "brightness": 10,

        // Optional, boolean, default: false. Whether to swap left to right when outputting to the LED matrix.
        // Setting this might be necessary if you wired your LEDs differently.
        "flip_x": false,

        // Optional, boolean, default: false. Whether to swap top to bottom when outputting to the LED matrix.
        // Setting this might be necessary if you wired your LEDs differently.
        "flip_y": false,

        // Optional, boolean. Whether to apply gamma correction and per-channel color balancing.
        // Default: true for apa102/ws2812b (LED strips need gamma correction),
        //          false for rgbmatrix (HUB75 panels have their own color handling).
        // The gamma correction was calibrated for APA102 strips and includes aggressive
        // per-channel scaling (green to 45%, blue to 37.5%) which is wrong for RGB matrices.
        // "gamma_enabled": false,
    },

    // Configuration specific to the RGB Matrix driver (HUB75 panels).
    // Optional. This whole stanza is optional because none of the keys within it are required.
    "rgbmatrix": {

        // Optional, integer, default: 4. GPIO slowdown for Pi 3/4. Try 2-5 if you see issues.
        "gpio_slowdown": 4,

        // Optional, integer, default: 11. PWM bits for color depth (1-11). Lower = faster refresh.
        "pwm_bits": 11,

        // Optional, integer, default: 130. PWM timing in nanoseconds. Try 100-300.
        "pwm_lsb_nanoseconds": 130,

        // Optional, integer, default: 0. Limit refresh rate in Hz (0 = unlimited).
        "limit_refresh_rate_hz": 0,

        // Optional, boolean, default: false. Use software PWM instead of hardware.
        // Enable if you have audio conflicts.
        "disable_hardware_pulsing": false,
    },

    // Configuration specific to displaying videos.
    // Optional. This whole stanza is optional because none of the keys within it are required.
    "video": {

        // Optional, string, default: "color". Controls whether videos are displayed in color or monochrome.
        // Valid values: color, bw, red, green, blue, inv_color, inv_bw.
        "color_mode": "color",

        // Opetional, boolean, default: true. Whether to play audio when playing videos.
        "should_play_audio": true,

        // Optional, boolean, default: false. Whether to save the videos that are played. Saving the video
        // allows us to avoid yt-dlp network calls to download the video if it's played again.
        "should_save_video": false,

        // Optional, boolean, default: false. Whether to predownload the video, as opposed to streaming it.
        // Setting this to true forces the video to fully download before playing.
        "should_predownload_video": false,
    },

    "sound": {
        // Optional integer, default: 0. The card number to use for the `amixer` command. This can be useful if
        // you use an external soundcard. Check the output of `aplay --list-devices` to determine which card
        // number to use. See: https://gist.github.com/dasl-/e400409f4f3afdcaf2aef3f40af8528f
        "card": 0,

        // Optional integer, default: 1. The numid to use for the `amixer` command. This can be useful if
        // you use an external soundcard. Check the output of `amixer -c <card_number> controls` to determine
        // which numid to use. See: https://gist.github.com/dasl-/e400409f4f3afdcaf2aef3f40af8528f
        "numid": 1,

        // Optional, ?boolean, default: null. Whether volume should be adjusted logarithmically to match
        // perceptual loudness. If the volume slider increments don't seem natural, try enabling this. Null
        // means try to autodetect (i.e. set to `true` for raspberry pi internal sound card, and set to
        // `false` for external sound cards).
        "adjust_volume_logarithmically": null,

        // Optional, ?integer, default: null. Volume level at which to limit raspberry pi. This can be useful
        // in conjunction with the raspberry pi headphone jack, because the internal soundcard allows
        // incrementing the volume to a level which results in clipping. Null means try to autodetect (i.e.
        // set to `0` for raspberry pi internal sound card, and set to the global max vol val for external
        // sound cards).
        "limited_max_vol_val": null,
    },

    // Configuration specific to the screensavers that play while nothing is in the playlist queue.
    // Optional. This whole stanza is optional because none of the keys within it are required.
    "screensavers": {

        // Optional, array of strings, default: ["game_of_life", "cyclic_automaton"].
        // Which screensavers are included in the rotation. Use screensaver IDs.
        "enabled": ["game_of_life", "cyclic_automaton"],

        // Optional, ?float, default: 120. Screensaver timeout in seconds.
        // Each screensaver will end after this many seconds and rotate to the next one.
        // Set to null or 0 to disable (screensavers run indefinitely).
        // Can be overridden per-screensaver via screensavers.configs.<id>.timeout.
        // A per-screensaver timeout of null falls back to this global value.
        "timeout": 120,

        // Optional, float, default: 0.05. Seconds to sleep between ticks (frame rate).
        // Can be overridden per-screensaver via screensavers.configs.<id>.tick_sleep.
        "tick_sleep": 0.05,

        // Configuration for transitions between screensavers.
        // Optional. This whole stanza is optional because none of the keys within it are required.
        "transitions": {

            // Optional, boolean, default: true. Whether to play animated transitions between screensavers.
            "enabled": true,

            // Optional, float, default: 1.0. Duration of the transition in seconds.
            "duration": 1.0,

            // Optional, float, default: 0.03. Seconds to sleep between transition frames.
            "tick_sleep": 0.03,

            // Optional, integer, default: 60. Number of ticks to pre-render the next screensaver
            // before playing the transition. This makes the transition move into an already-running
            // screensaver instead of a blank frame. Higher values give the next screensaver more
            // time to build up visual state. Set to 0 to disable pre-rendering.
            "warm_up_ticks": 60,
        },

        // Per-screensaver configuration.
        // Each screensaver has its own stanza with configurable options.
        "configs": {
            "airplay_karaoke": {
    
                // Optional, string, default: "/tmp/shairport-sync-metadata".
                // Path to the shairport-sync metadata pipe.
                "metadata_pipe": "/tmp/shairport-sync-metadata",
    
                // Optional, float, default: 0.05. How long to sleep between display updates.
                "tick_sleep": 0.05,
    
                // Optional, boolean, default: true. Whether current lyrics pulse in brightness.
                // When false, lyrics display at a steady dimmer brightness.
                "pulse_lyrics": true,
            },

            "aurora": {
    
                // Optional, integer, default: 4. Number of aurora curtains.
                "num_curtains": 4,
    
                // Optional, boolean, default: true. Whether to show twinkling background stars.
                "show_stars": true,
    
                // Optional, integer, default: 15. Number of background stars.
                "num_stars": 15,
    
                // Optional, float, default: 1.0. Overall animation speed multiplier.
                "time_speed": 1.0,
    
                // Optional, float, default: 0.04. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.04,
            },

            "blueprint": {},

            "boids": {
    
                // Optional, integer, default: 15. Number of boids in the simulation.
                "num_boids": 15,
    
                // Optional, float, default: 0.05. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.05,
    
                // Optional, float, default: 1.5. Maximum speed of boids.
                "max_speed": 1.5,
    
                // Optional, float, default: 8.0. Perception radius for flocking behavior.
                "perception_radius": 8.0,
    
                // Optional, float, default: 2.0. Minimum distance for separation behavior.
                "min_distance": 2.0,
    
                // Optional, float, default: 1.5. Weight for separation steering.
                "separation_weight": 1.5,
    
                // Optional, float, default: 1.0. Weight for alignment steering.
                "alignment_weight": 1.0,
    
                // Optional, float, default: 1.0. Weight for cohesion steering.
                "cohesion_weight": 1.0,
            },

            "colorfield": {},

            "cosmic_dream": {
    
                // Optional, integer, default: 20. Number of particles in the flow field.
                "num_particles": 20,
    
                // Optional, integer, default: 8. Length of particle trails.
                "trail_length": 8,
    
                // Optional, float, default: 0.5. Speed of particles.
                "particle_speed": 0.5,
    
                // Optional, float, default: 0.03. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.03,
            },

            "cyclic_automaton": {
    
                // Optional, float, default: 0.07. How long to sleep between ticks, in seconds,
                "tick_sleep": 0.07,
    
                // Optional, integer, default: 16. How many frames are analyzed to determine if we are stuck in a loop
                // and if we should to end the game.
                "game_over_detection_lookback": 16,
    
                // Optional, boolean, default: false. Whether to do fade transitions between frames of the game.
                "fade": false,
            },

            "domainwarp": {},

            "double_pendulum": {

                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "dvd_bounce": {
    
                // Optional, integer, default: 8. Width of the bouncing logo in pixels.
                "logo_width": 8,
    
                // Optional, integer, default: 4. Height of the bouncing logo in pixels.
                "logo_height": 4,
    
                // Optional, float, default: 0.5. Movement speed of the logo.
                "speed": 0.5,
    
                // Optional, string, default: random. Color mode for the logo.
                // Valid values: "random", "rainbow", "pastel", "white".
                "color_mode": "random",
    
                // Optional, boolean, default: true. Whether to show a border around the logo.
                "show_border": true,
    
                // Optional, boolean, default: false. Whether to show "DVD" text in the logo.
                "show_text": false,
    
                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "escher": {

                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "fire": {

                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "flowfield": {
    
                // Optional, integer, default: 50. Number of particles.
                "num_particles": 50,
    
                // Optional, float, default: 0.95. Fade rate per frame.
                "fade": 0.95,
    
                // Optional, float, default: 0.5. Particle movement speed.
                "speed": 0.5,
    
                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "game_of_life": {
    
                // Optional, float in range: [0,1], default: 0.3333. How likely each pixel is to be alive (on)
                // in the initial state.
                "seed_liveness_probability": 0.3333,
    
                // Optional, float, default: 0.07. How long to sleep between ticks, in seconds,
                "tick_sleep": 0.07,
    
                // Optional, integer, default: 16. How many frames are analyzed to determine if we are stuck in a loop
                // and if we should to end the game.
                "game_over_detection_lookback": 16,
    
                // Optional, string, default: "random". The color mode for the game.
                // Valid values: "random", "red", "green", "blue", "bw", "rainbow".
                "game_color_mode": "random",
    
                // Optional, string, default: "random". The variant for the game.
                // Valid values: "normal", "immigration".
                // See: https://cs.stanford.edu/people/eroberts/courses/soco/projects/2008-09/modeling-natural-systems/gameOfLife2.html
                "variant": "random",
    
                // Optional, boolean, default: false. Whether to do fade transitions between frames of the game.
                "fade": false,
    
                // Optional, boolean, default: false. Whether to invert the colors.
                "invert": false,
            },

            "geodesic": {

                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "halftone": {},

            "hex_grid": {},

            "inkinwater": {
    
                // Optional, float, default: 0.06. Chance of new drop per frame.
                "drop_chance": 0.06,
    
                // Optional, float, default: 0.15. How fast ink diffuses.
                "diffusion_rate": 0.15,
    
                // Optional, float, default: 0.03. Upward flow strength (0 to disable).
                "flow_strength": 0.03,
    
                // Optional, float, default: 0.997. Slow fade rate.
                "fade": 0.997,
    
                // Optional, float, default: 0.04. Tick sleep time.
                "tick_sleep": 0.04,
            },

            "kaleidoscope": {},

            "klee": {},

            "lavalamp": {
    
                // Optional, integer, default: 10. Number of blobs.
                "num_blobs": 10,
    
                // Optional, float, default: 0.03. How fast blobs heat up.
                "heat_rate": 0.03,
    
                // Optional, float, default: 0.02. How fast blobs cool down.
                "cool_rate": 0.02,
    
                // Optional, float, default: 0.08. Buoyancy force strength.
                "buoyancy": 0.08,
    
                // Optional, float, default: 0.05. Tick sleep time.
                "tick_sleep": 0.05,
            },

            "lenia": {},

            "lorenz": {
    
                // Optional, float, default: 10.0. Lorenz sigma parameter.
                "sigma": 10.0,
    
                // Optional, float, default: 28.0. Lorenz rho parameter.
                "rho": 28.0,
    
                // Optional, float, default: 2.667. Lorenz beta parameter.
                "beta": 2.667,
    
                // Optional, float, default: 0.01. Time step for integration.
                "dt": 0.01,
    
                // Optional, integer, default: 5. Integration steps per frame.
                "steps_per_frame": 5,
    
                // Optional, integer, default: 800. Number of points in the trail.
                "trail_length": 800,
    
                // Optional, float, default: 0.005. Speed of view rotation.
                "rotation_speed": 0.005,
    
                // Optional, float, default: 0.03. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.03,
            },

            "mandelbrot": {
    
                // Optional, integer, default: 100. Maximum iterations for escape calculation.
                // Higher values show more detail but are slower.
                "max_iterations": 100,
    
                // Optional, float, default: 1.02. Zoom multiplier per tick.
                // Values closer to 1.0 zoom slower.
                "zoom_speed": 1.02,
    
                // Optional, float, default: 0.02. How fast the view moves toward the target.
                // Values closer to 0 move slower.
                "lerp_factor": 0.02,
    
                // Optional, float, default: 0.05. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.05,
            },

            "matrix_rain": {
    
                // Optional, float, default: 0.2. Minimum drop fall speed.
                "min_speed": 0.2,
    
                // Optional, float, default: 0.8. Maximum drop fall speed.
                "max_speed": 0.8,
    
                // Optional, integer, default: 4. Minimum trail length.
                "min_length": 4,
    
                // Optional, integer, default: 12. Maximum trail length.
                "max_length": 12,
    
                // Optional, float, default: 0.85. Trail fade rate per tick (0-1).
                "fade_rate": 0.85,
    
                // Optional, float, default: 0.08. Probability of spawning new drops.
                "spawn_rate": 0.08,
    
                // Optional, string, default: "green". Color mode for the rain.
                // Valid values: "green", "blue", "rainbow", "white".
                "color_mode": "green",
    
                // Optional, float, default: 0.05. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.05,
            },

            "melting_clock": {
    
                // Optional, boolean, default: false. Whether to show seconds (HH:MM:SS vs HH:MM).
                "show_seconds": false,
    
                // Optional, string, default: null (local time). Timezone to display time in.
                // Examples: "America/New_York", "Europe/London", "Asia/Tokyo", "UTC".
                // See: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
                "timezone": null,
    
                // Optional, float, default: 0.15. Speed of melting/dripping animation.
                "melt_speed": 0.15,
    
                // Optional, float, default: 0.05. Speed of new digit forming.
                "form_speed": 0.05,
    
                // Optional, float, default: 0.85. Trail fade rate per tick (0-1).
                "trail_fade": 0.85,
    
                // Optional, float, default: 0.001. Speed of color hue cycling.
                "hue_speed": 0.001,
    
                // Optional, string, default: "rainbow". Color mode.
                // Valid values: "rainbow", "green", "blue", "red", "white".
                "color_mode": "rainbow",
    
                // Optional, float, default: 0.05. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.05,
            },

            "metaballs": {
    
                // Optional, integer, default: 5. Number of metaballs.
                "num_balls": 5,
    
                // Optional, float, default: 0.5. Movement speed of metaballs.
                "speed": 0.5,
    
                // Optional, float, default: 1.0. Threshold for blob surface (lower = larger blobs).
                "threshold": 1.0,
    
                // Optional, boolean, default: true. Whether to add glow effect at blob edges.
                "glow": true,
    
                // Optional, float, default: 0.04. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.04,
            },

            "misprint": {},

            "moire": {},

            "noise_gradient": {},

            "nyc_subway": {
    
                // Optional, array of strings, default: ["127N", "127S"].
                // Stop IDs to monitor. Format: stop_id + direction (N=uptown/north, S=downtown/south).
                // Find stop IDs at: https://transitfeeds.com/p/mta/79/latest/stops
                // Examples:
                //   "127N"/"127S" = 34 St-Penn Station (1/2/3)
                //   "A32N"/"A32S" = 34 St-Penn Station (A/C/E)
                //   "R17N"/"R17S" = 34 St-Herald Sq (N/Q/R/W/B/D/F/M)
                //   "L01N"/"L01S" = 8 Av (L)
                //   "631N"/"631S" = Grand Central-42 St (4/5/6)
                "stop_ids": ["D25N", "237N", "A44N"],
    
                // Optional, array of strings, default: ["1", "2", "3"].
                // Subway lines to display. Use line letters/numbers.
                "lines": ["B", "Q", "2", "3", "4", "5", "A", "C"],
    
                // Optional, integer, default: 30. How often to refresh data from MTA, in seconds.
                "update_interval": 30,
    
                // Optional, integer, default: 4. Maximum number of arrivals to show.
                "max_arrivals": 4,
    
                // Optional, float, default: 1.0. How long to sleep between display updates, in seconds.
                "tick_sleep": 0.05,
            },

            "opart": {

                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "pendulumwaves": {
    
                // Optional, integer, default: 0. Number of pendulums (0 = auto based on width).
                "num_pendulums": 0,
    
                // Optional, float, default: 60.0. Base period in frames for longest pendulum.
                "base_period": 60.0,
    
                // Optional, integer, default: 600. Frames for full pattern cycle.
                "cycle_time": 600,
    
                // Optional, float, default: 1.5. Size of pendulum bob.
                "bob_size": 1.5,
    
                // Optional, float, default: 0.85. Trail fade rate.
                "trail_fade": 0.85,
    
                // Optional, string, default: rainbow. Color mode: rainbow, gradient, white.
                "color_mode": "rainbow",
    
                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "perlinworms": {
    
                // Optional, integer, default: 8. Number of worms.
                "num_worms": 8,
    
                // Optional, integer, default: 12. Length of each worm in segments.
                "worm_length": 12,
    
                // Optional, float, default: 0.8. Worm movement speed.
                "speed": 0.8,
    
                // Optional, float, default: 0.1. Scale of noise field.
                "noise_scale": 0.1,
    
                // Optional, float, default: 0.02. How fast noise field evolves.
                "time_speed": 0.02,
    
                // Optional, float, default: 0.92. Trail fade rate.
                "fade": 0.92,
    
                // Optional, float, default: 1.5. Glow radius around worm segments.
                "glow_size": 1.5,
    
                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "phyllotaxis": {},

            "pixelsort": {},

            "purkinje": {},

            "self_healing_squares": {

                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "shadebobs": {
    
                // Optional, integer, default: 5. Number of bobs (glowing circles).
                "num_bobs": 5,
    
                // Optional, float, default: 0.92. Fade rate per frame (lower = faster fade).
                "fade": 0.92,
    
                // Optional, float, default: 0.03. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.03,
            },

            "sonos_karaoke": {
    
                // Optional, string, default: null. Name of Sonos speaker to use.
                // If null, uses first discovered speaker.
                // Example: "Living Room", "Kitchen"
                "speaker_name": null,
    
                // Optional, float, default: 0.5. How often to poll Sonos for position (seconds).
                "update_interval": 0.5,
    
                // Optional, float, default: 0.05. How long to sleep between display updates.
                "tick_sleep": 0.05,
    
                // Optional, boolean, default: true. Whether current lyrics pulse in brightness.
                // When false, lyrics display at a steady dimmer brightness.
                "pulse_lyrics": true,
            },

            "spirograph": {
    
                // Optional, integer, default: 500. Number of points in the trail.
                "trail_length": 500,
    
                // Optional, boolean, default: true. Whether older trail points fade out.
                "fade_trail": true,
    
                // Optional, float, default: 1.0. Speed multiplier for pattern generation.
                "time_speed": 1.0,
    
                // Optional, float, default: 0.02. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.02,
            },

            "starfield": {
    
                // Optional, integer, default: 80. Number of stars.
                "num_stars": 80,
    
                // Optional, float, default: 0.02. Speed of stars moving toward viewer.
                "speed": 0.02,
    
                // Optional, boolean, default: true. Whether to show motion trails on close stars.
                "show_trails": true,
    
                // Optional, integer, default: 3. Length of motion trails.
                "trail_length": 3,
    
                // Optional, float, default: 0.03. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.03,
            },

            "stringart": {
    
                // Optional, integer, default: 64. Number of points on the circle.
                "num_points": 64,
    
                // Optional, integer, default: 32. Number of strings to draw.
                "num_strings": 32,
    
                // Optional, float, default: 0.02. Speed of multiplier change.
                "multiplier_speed": 0.02,
    
                // Optional, float, default: 0.01. Rotation speed.
                "rotation_speed": 0.01,
    
                // Optional, float, default: 0.15. Fade rate per frame.
                "fade": 0.15,
    
                // Optional, float, default: 0.4. Line brightness.
                "line_brightness": 0.4,
    
                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "test_print": {},

            "unknownpleasures": {
    
                // Optional, integer, default: 0. Number of wave lines (0 = auto based on height).
                "num_lines": 0,
    
                // Optional, float, default: 0.05. Wave animation speed.
                "wave_speed": 0.05,
    
                // Optional, float, default: 0.15. Noise scale for wave generation.
                "noise_scale": 0.15,
    
                // Optional, float, default: 0.4. Wave amplitude.
                "amplitude": 0.4,
    
                // Optional, float, default: 1.0. Line brightness.
                "line_brightness": 1.0,
    
                // Optional, boolean, default: true. Fill below wave lines (solid mountain effect).
                "fill_below": true,
    
                // Optional, string, default: white. Color mode: white, blue, rainbow.
                "color_mode": "white",
    
                // Optional, float, default: 0.05. Tick sleep time.
                "tick_sleep": 0.05,
            },

            "video_screensaver": {

                // Optional, array, default: []. Videos that may be cycled through as screensavers.
                // Add videos to the data/screensavers directory and update this value with those names.
                "saved_videos": [],
            },

            "vortices": {

                // Optional, float, default: 0.03. Tick sleep time.
                "tick_sleep": 0.03,
            },

            "wave_interference": {
    
                // Optional, integer, default: 4. Number of wave sources.
                "num_sources": 4,
    
                // Optional, float, default: 0.5. Frequency of the waves (higher = tighter ripples).
                "wave_frequency": 0.5,
    
                // Optional, float, default: 0.15. How fast time advances (wave animation speed).
                "time_speed": 0.15,
    
                // Optional, float, default: 0.3. How fast sources drift around.
                "drift_speed": 0.3,
    
                // Optional, string, default: "rainbow". Color mode for the waves.
                // Valid values: "rainbow", "monochrome", "plasma", "classic".
                "color_mode": "rainbow",
    
                // Optional, float, default: 0.03. How long to sleep between ticks, in seconds.
                "tick_sleep": 0.03,
            },

            "wfmu": {
    
                // Optional, string, default: "wfmu". Which WFMU stream to display.
                // Valid values: "wfmu" (main 91.1), "gtd" (Give the Drummer Radio),
                // "rock_n_soul" (Rock'n'Soul Radio).
                "channel": "wfmu",
    
                // Optional, integer, default: 15. How often to refresh data, in seconds.
                "update_interval": 15,
    
                // Optional, float, default: 0.05. How long to sleep between display updates.
                "tick_sleep": 0.05,
            },
        },
    },


    // Configuration specific to playing snake.
    // Optional. This whole stanza is optional because none of the keys within it are required.
    "snake": {

        // Optional, string, default: "random". The color mode for the game.
        // Valid values: "random", "red", "green", "blue", "bw", "rainbow".
        "game_color_mode": "random",
    },

    // Configuration specific to playing pong.
    // Optional. This whole stanza is optional because none of the keys within it are required.
    "pong": {

        // Optional, integer, default: 3. Height of the paddles in pixels.
        "paddle_height": 3,

        // Optional, float, default: 0.5. Initial ball speed.
        "ball_speed": 0.5,

        // Optional, float, default: 1.5. Maximum ball speed.
        "max_ball_speed": 1.5,
    },

}