FEEL THE RESPONSE. HEAR THE DIFFERENCE.
The engine room.
A test bench for the sound your drive is missing.
Virtual RPM and gears are simulated. Recorded engines use a single loop each.
Set up your run
01 / INPUTA repeatable 40-second drive. Compare delayed observations with known simulated speed.
Uses browser location speed, with position differences as a fallback. Permission is requested only when you connect.
Not connected. Trusted HTTPS is required outside localhost.
Timestamp diagnostics appear here after the first GPS callback.
Speed response
Last 30 seconds · mph
Bench mode auditions RPM directly. Select a simulated drive or live GPS for speed traces.
Audio monitor
Waveform · after volume and limiter
Digital signal monitor. It cannot detect distortion or delay added by the car’s speakers.
Response tuning
02 / COMPARECapture the evidence
03 / EXPORTLog a run, compare settings, and keep an audio take. Data stays here unless you download it or choose an encrypted QR link.
QR to phone uploads an encrypted snapshot for 30 minutes. Anyone with the QR link can open it.
Sync pulse gives a visual flash and a beep for an external video test. Exported timings and internal audio recordings do not measure physical speaker latency.
Detailed diagnostics CAPABILITIES / TIMING / SESSION
Control ACK includes return delivery and main-thread scheduling. Base and output latency are browser reports, may be zero or unavailable, and do not establish accelerator-to-speaker latency. UI frame gaps and long tasks are main-thread signals, not measured audio dropouts.
Audio provenance & testing guide LICENSES / LIMITATIONS
01 / Listen while parked
Start at low volume. Sweep RPM, compare sources at the same load, and listen with crossfade at 0 and 8 ms. Pitch clamps and single-loop stretching will be audible.
02 / Compare response
Use the same simulated drive with prediction on and off. Export separate captures. The truth trace exists only in simulation; GPS mode has no independent reference.
03 / Test in the Tesla
Use a trusted HTTPS address. Set up while parked; have a passenger handle diagnostics. Record the screen and speakers externally for a sync-pulse test and physical pedal-to-sound comparison.