Lab · Playground · Instruments
38 live labsEngineering instruments, live in your browser.
Measure your GPU, route an edge database, build a voice DSP chain, or explore a numerical solver. App-grounded instruments cite the shipped system they come from; independent labs disclose method, equations, and limitations.
New · Deployment labs
Client, cloud, and edge—measured honestly.
Four high-intent labs connect browser primitives to production deployment decisions. Charts start empty, secrets never enter shared site code, and model-only latency is labeled as model-only.
Voice Synthesis DSP Sandbox
Text-to-speech through a live Web Audio DSP rack
Open lab →
Client vs Serverless GPU Benchmarker
Your GPU vs a cloud GPU, measured — never estimated
Open lab →
Edge DB Sync Lab
Place replicas on a world map, watch reads beat writes
Open lab →
Vector Retrieval Recall Lab
Measure the candidates you skip—and the neighbors you lose
Open lab →All instruments
Physics, DSP, embedded, and ML
Quaternion ↔ Euler Converter
The exact head-orientation math running inside MotionLink
Draw → Fourier Epicycles
Any shape, decomposed into spinning circles
Live Earth
Real coastlines, real weather, real ISS orbit
Audio & Acoustics Toolbox
Serious engineering tools for audio, acoustics, DSP, and loudspeaker design
Double Pendulum + Phase Space
Chaotic motion, painted as pure geometry
Biquad Filter Designer
Hear a cascade, not just see a curve
Room Shape Optimizer
Give it a volume, it solves for the shape
Head-Tracked Stereo Pan
Rotate a virtual head, hear the pan move
CoreML Model Size & Quantization Calculator
Exact on-device footprint math, no throughput guesswork
BLE GATT / CSV Frame Visualizer
How raw serial bytes become a CSV row
Agentic DSP Pipeline Step-Through
Record → retrieve → generate → verify → iterate
Chladni Cymatics
Sound made visible — standing wave sand patterns
N-Body Orbital Choreography
Gravity, three bodies, and a stable dance
Conformal Mapping Explorer
Watch a grid warp under a complex function
Lattice Boltzmann Wind Tunnel
A Von Kármán vortex street, computed live
Ray-Matrix Optics Bench
Paraxial rays through lenses, mirrors, and cavities
Gaussian Beam Calculator
Waist, Rayleigh range, divergence, and the full beam envelope
Sun Path & Shadow Calculator
Where the sun is, when it crosses, what it shadows
Quantum Tunneling Simulator
Watch a wave packet leak through a wall
Magnetic Field Line Tracer
Biot–Savart field lines, marched by RK4
Relativistic Starship Journey
1g to the stars, drawn on a Minkowski diagram
PID & MPC Flight Arena
Tune a quadrotor, watch quaternions keep it alive
Microstrip & Signal Integrity Lab
TEM waves, S-parameters, and eye diagrams that bite
Agentic Closed-Circuit Lab
GenUI instruments gated by deterministic solvers — Edge SLM proposes, Zod + registry disposes
FPGA Verilog Live Sculptor
WASM-compiled HDL → LUT map, flashing on violations
WebGPU PINN Training Studio
Watch a neural operator learn Navier-Stokes in your GPU
Visual-Inertial SLAM Arena
EKF meets pixels: track, map, loop-close, snap
Antenna Array & EM Propagation Sandbox
Steer a beam, shimmer RF wavefronts, hear alignment
FEA Structural Dynamics Lab
Von Mises, displacements, creaks, fracture snaps
GaN/SiC Power Electronics & FOC Drive
Space Vector PWM, flux rotation, motor whine to 20 kHz
RTOS Scheduler Visualizer
Tasks, mutexes, ISRs, and deadline tension you can hear
RF & Microwave Circuit Bench
S-parameters live on a Smith Chart, hum to pure tone at 50Ω
Acoustic Beamforming Calculator
A line array, solved: beamwidth, directivity index, aliasing ceiling
Edge AI SBC & Hardware Accelerator Explorer
LattePanda vs Jetson Orin vs Coral TPU — latency, TOPS/W & memory bandwidth
Audio & acoustics
Speaker, room and filter calculators.
11 benches for when air, electricity and mechanics have to agree — enclosure alignment, room modes, horn flare, voice-coil heating, cone breakup. Each is its own page with shareable URLs and its method written out. See how they compose →
Acoustics Calculators
Wavelength, SPL, RT60, delay — the numbers you reach for daily
RT60 Calculator
Sabine and Eyring side by side, and where they part
Helmholtz Resonator Calculator
A spring made of air — cavity, neck, one frequency
Speaker Port Length Calculator
Tuning frequency in, length to cut out
Room Mode Calculator
Where bass piles up and why your room lies
Pole-Zero Plot Tool
Drag poles, hear the math bite
Speaker Box Calculator
Box as spring, port as mass — Thiele-Small alignment
Driver Nonlinearity Lab
Bl(x), Kms(x), Le(x) — why sine out ≠ sine in
Speaker Power Compression
Power in, heat stays, SPL sags
Acoustic Horn Calculator
Webster flare — exponential, conical, oblate spheroidal
Speaker Cone Breakup Simulator
Piston to chaos — bending waves win
Analyses
One dataset, read closely.
Every few weeks we take one public dataset, check it, and chart what is in it. Every figure is computed from a pinned snapshot of the data, with the source and licence on the page.
All analyses →Computed reference
Solved answers, not articles.
Five reference instruments that solve a whole family of inputs at once — a picker or a table instead of one form — each backed by the same function as its public API endpoint. No prose is generated; every figure is a solver call.
LLM VRAM, model by model and card by card
Weight bytes, KV-cache growth and the memory-bandwidth ceiling on decode speed, for 68 open models against 22 accelerators. Architecture read from each model's own published config.
Will it fit? →AcousticsRoom modes, size by size
Every standing wave a rectangular room supports below 300 Hz, solved exactly from geometry for 653 real room sizes. No material assumptions and nothing fetched.
Pick your room →DSPBiquad coefficients, corner by corner
8 RBJ filter types at 31 third-octave corners, with 48 kHz coefficients, poles solved from the quadratic, and the word length each design stops working at.
Solve a filter →MagnetostaticsSolenoid fields, coil by coil
On-axis field of 210 air-core coils across 14 winding diameters and 15 lengths, with the span each one holds to 1% and the turn count below which the closed form stops being true.
Size a coil →AcousticsRoom shape, band by band
The inverse problem: give it the volume you have and it returns the proportions to build. 3 shapes cover 800–5,000 cubic feet, and 1 of them are the exact optimum everywhere they apply.
Pick a volume →