{ "$schema": "http://json-schema.org/draft-07/schema#", "product": "tape 01", "family": "tape", "version": "2.1.0", "production_standard": "option 1 // translucent smoked obsidian polycarbonate with enig gold traces and cnc aluminum backplate", "description": "machine-readable physical and hardware specifications for algorhythmia tape 01 rev b.", "parent_system": "algorhythmia-design-system", "case_rule": "binary_case_law", "enclosure": { "footprint_mm": { "width": 100.4, "height": 63.8, "depth_main_body": 8.6, "depth_max": 12.0 }, "golden_ratio_phi": 1.618, "aspect_ratio": 1.5737, "chamfer_mm": 0.4, "corner_radius_mm": 3.0, "target_mass_grams": 128, "materials": { "top_shell": "translucent smoked obsidian polycarbonate (bayer makrolon 2805, 35% optical transmission, satin finish)", "bottom_plate": "6061-t6 aluminum alloy, bead-blast #180, type III hardcoat deep matte black anodized (MIL-A-8625)", "core_chassis": "high-density PBT or 6061-t6 aluminum unibody core skeleton", "spool_dials": "CNC-turned 6061-t6 aluminum with diamond knurl and clear titanium anodizing or passivated brass", "button_caps": "molded matte PBT carbon black (#1A1D20) with laser-etched bone chalk symbols", "power_switch": "knurled solid passivated brass with 300 gf positive mechanical detent", "pcb_finish": "deep matte black solder mask (#0A0A0A) with exposed ENIG gold circuit schematics" }, "fasteners": { "type": "torx t5", "quantity": 5, "material": "stainless steel", "finish": "black oxide", "locations": [ {"x_mm": 4.0, "y_mm": 4.0, "name": "top_left"}, {"x_mm": 96.4, "y_mm": 4.0, "name": "top_right"}, {"x_mm": 4.0, "y_mm": 59.8, "name": "bottom_left"}, {"x_mm": 96.4, "y_mm": 59.8, "name": "bottom_right"}, {"x_mm": 50.2, "y_mm": 54.0, "name": "center_spine"} ] } }, "interface": { "rotary_spools": { "count": 2, "form_factor": "classic compact cassette spool hub (IEC 60094-7)", "spindle_spacing_mm": 42.5, "outer_diameter_mm": 21.4, "dish_concavity_mm": 1.0, "height_above_faceplate_mm": 1.8, "materials": "turned solid brass or 6061-t6 aluminum", "knurling": "diamond knurl (DIN 82-RG, pitch 0.5 mm)", "spline_notches": 6, "damping": "high-viscosity synthetic fluorosilicone damping grease (nyegel 774H)", "mapping": { "spool_a": { "label": "FLUX", "center_coord": {"x_mm": 28.95, "y_mm": 31.9}, "role": "head velocity, clock rate, sample rate division, sequence tempo, delay buffer length" }, "spool_b": { "label": "BIAS", "center_coord": {"x_mm": 71.45, "y_mm": 31.9}, "role": "transition rule, magnetic saturation, algorithmic equation morph, feedback recursion, wavefolder drive" } } }, "spool_led_rings": { "count_per_spool": 16, "pitch_diameter_mm": 23.6, "aperture_diameter_mm": 0.4, "angular_spacing_deg": 22.5, "style": "dead-front sub-surface micro-apertures with PMMA optical light guides", "modes": [ "rotary playhead trace (clock division / loop position)", "stereo VU meter (left and right channel peak telemetry)", "parameter arc gauge (0% to 100% position)", "battery charge gauge on startup" ] }, "buttons": { "configuration": "ergonomic diagonal outward offset at 45 degrees towards outer edges", "keycap_diameter_mm": 7.0, "actuation_force_gf": 55, "travel_mm": 1.1, "material": "molded matte PBT (#1A1D20)", "drive_button": { "label": "DRIVE", "coord": {"x_mm": 14.5, "y_mm": 46.0}, "role": "transport clutch, latch play/pause, momentary tape brake, buffer freeze, scrub modifier" }, "state_button": { "label": "STATE", "coord": {"x_mm": 85.9, "y_mm": 46.0}, "role": "Turing state register, domain manifold selector, sub-register step, flash commit latch" } }, "power_switch": { "location": "left side perimeter rail", "coord": {"x_mm": 0.0, "y_mm": 14.0}, "type": "miniature lateral slide switch with 300 gf positive mechanical detent", "actuator": "knurled passivated brass or matte black slider (3.5 x 2.0 mm), recessed 0.2 mm" }, "ports": { "location": "top perimeter rail", "pitch_mm": 17.5, "connectors": [ { "name": "IN", "coord_x_mm": 15.0, "type": "3.5 mm TRS stereo jack", "role": "stereo line input (1 Vrms nominal, 2 Vrms max), ESD protected" }, { "name": "SYNC IN", "coord_x_mm": 32.5, "type": "3.5 mm TS/TRS clock sync jack", "role": "analog clock sync input (0-5V pulse), pocket operator and modular compatible" }, { "name": "USB-C", "coord_x_mm": 50.2, "type": "24-pin USB type-c", "role": "5V power-path charging, bidirectional USB-MIDI, serial UF2 updates, recessed 0.8 mm" }, { "name": "SYNC OUT", "coord_x_mm": 67.9, "type": "3.5 mm TS/TRS clock sync jack", "role": "analog clock sync output (3.3V pulse), master studio clock generator" }, { "name": "OUT", "coord_x_mm": 85.4, "type": "3.5 mm TRS stereo jack with headphone driver", "role": "dedicated stereo line / headphone output, 32-ohm to 300-ohm capable" } ] }, "optical_display": { "location": "central horizontal horizon between spools", "coord": {"x_mm": 50.2, "y_mm": 31.9}, "dimensions_mm": {"width": 20.0, "height": 12.36}, "aspect_ratio": 1.6181, "proportions": "golden rectangle (phi)", "lens": "frosted optical-grade PMMA (78% transmittance), flush with 0.2 mm black bezel", "elements": "8-element horizontal micro-LED telemetry array (the 8-bit Turing register)", "telemetry_layout": { "domain_00_preview": "[••......] (pos 1 & 2 amber #FFB000)", "domain_01_preview": "[...••...] (pos 4 & 5 green #00FF66 - bilateral 3-2-3 symmetry)", "domain_02_preview": "[......••] (pos 7 & 8 cyan #54E5FF)" }, "colors": { "domain_bytebeat": "#FFB000", "domain_cellular": "#00FF66", "domain_transform": "#54E5FF", "peak_clip": "#D80027", "commit_flash": "#E2E4DE" } } }, "electronics": { "microcontroller": "RP2350A dual-core ARM cortex-M33 at 150 MHZ", "adc": "PCM1860 stereo audio ADC (I2S master clock source)", "dac": "PCM5102A stereo 32-bit audio DAC", "sample_rate_khz": 48.0, "memory_sram_kb": 520, "dsp_allocation": "zero dynamic heap allocation during real-time audio loop", "pcb": { "layers": 4, "substrate": "FR4 (TG > 150°C, 1.2 mm thickness)", "solder_mask": "deep matte black (#0A0A0A)", "silkscreen": "bone chalk epoxy ink (#E2E4DE), minimum line width 0.15 mm", "pads": "ENIG (electroless nickel immersion gold)" } }, "power": { "cell_type": "1s lipo rechargeable lithium-ion polymer", "nominal_voltage": 3.7, "capacity_mah": 600, "protection": "integrated PCM circuit board (over-charge, over-discharge, short-circuit)", "thermal_sensor": "10k NTC thermistor coupled to cell", "charging": "usb-c 5V active power-path management (play while charging)", "runtime_hours": "6 to 8 hours continuous playback under headphone load", "serviceability": "no glue; silicone compression gasket; serviceable via 5x torx t5 screws" }, "packaging": { "library_case": { "type": "archival compact cassette library case", "material": "smoky translucent or obsidian black polystyrene", "dimensions_mm": { "width": 108.0, "height": 70.0, "depth": 16.5 } }, "jcard": { "stock": "300 GSM dead-matte black uncoated archival stock", "panels": { "front_mm": "65.0 x 101.0", "spine_mm": "12.0 x 101.0", "flap_mm": "22.0 x 101.0", "accordion_fold_mm": "65.0 x 101.0 (3 panels)" }, "inks": "solid black base, metallic silver ink (pantone 877 c), bone white ink, alert orange (pantone 805 c)" } } }