AUDIO TEST

Test your mic and speakers.

Start the mic or speaker check. Watch levels, channels and playback locally.

NO INSTALLLIVE FEEDBACKLOCAL ONLY

STARTStart mic or speaker test

WATCHWatch level and path status

ACCESSMic only if requested

DATALocal only

1Start mic or speaker test

2Watch level and path status

3Stop when done

MEDIA DEVICE SIGNAL

Microphone level and speaker path, locally.

LIVE INPUT LEVELIDLE

WAVEFORM / TIME

SPECTRUM / FFT

LOG SWEEP / 8 SEC20 HZ → 20 KHZ

LOCAL RECORD / MAX 5 SECIDLE

Audio remains in this tab and is excluded from JSON.

1 KHZ ROUTE PROBENOT RUN

Use an acoustic, cable or virtual route. A visible 1 kHz return only confirms the path; it does not measure absolute latency.

CONTROLLED SNR / 2S QUIET + 3S SIGNALNOT RUN

NOISE —SIGNAL —

Keep microphone position and gain unchanged across both phases.

ACOUSTIC ROUND TRIP / 5 ROUNDSIDLE

—————

Includes speaker, air, microphone, OS and browser detection delay. Use speakers at a safe level.

1 KHZ THD EXPERIMENT / MULTI-FRAME / HARMONICS 2–5IDLE

FUNDAMENTAL —STATUS IDLEFRAMES —

Multi-frame acoustic complete-chain experiment; not a device THD specification.

REAL DEVICE PERMISSION / MICROPHONEIDLE

Permission, live Track and release state are measured locally. No audio sample or video frame is stored in this record.

PERMISSION APIUNKNOWN

REQUEST OUTCOMEIDLE

REQUEST LATENCY—

TRACK STATE—

GRANT-TIME FLAGS—

DEVICE LABELS0 / 0

RELEASE CHECKNOT RUN

ENDED TRACKS0 / 0

SECURE CONTEXT—

TRACK LABELHidden until permission grant

DIAGNOSTIC ACTION ENGINECOMPLETE THE PROTOCOL

Open the microphone path to begin diagnosis

Current media state: idle.

1 FINDING(S)2 ACTION(S)RULES / EVIDENCE-BOUND

INFO

Open the microphone path to begin diagnosis

Current media state: idle.

LIKELY CAUSES

Site permission is not granted.
Another application may own the device or the selected input is unavailable.

ACTIONS

Allow microphone access for this site.
Close call or recording apps and select the intended input in system settings.

RETEST CONDITION

The live dBFS meter and stream settings must appear before continuing.

Actions are generated from visible Evidence fields and versioned product rules. They do not identify a physical root cause with laboratory certainty.

LOCAL BASELINE HISTORY / OPT-IN

Compare repeat tests without an account.

0 / 20 SAVED · 90 DAY RETENTION

Device report

Complete this protocol before saving a baseline.

AUDIO PATH REPEATABILITY / LAST 5NEEDS MORE RUNS

0/5 RECENT COMPATIBLE RUNS

Save 3 more compatible run(s).

Controlled SNR— dBNEEDS 3 VALUESSTABLE ≤4 dB · REVIEW ≤8 dBNEEDS MORE RUNS

Noise median— dBFSNEEDS 3 VALUESSTABLE ≤4 dBFS · REVIEW ≤8 dBFSNEEDS MORE RUNS

Signal median— dBFSNEEDS 3 VALUESSTABLE ≤4 dBFS · REVIEW ≤8 dBFSNEEDS MORE RUNS

0 incompatible/incomplete and 0 older compatible run(s) excluded. The acoustic path includes speaker, room, microphone, OS processing and browser.

No raw axes, key logs, audio, video, images, full user agent or device ID is stored. Clearing browser site data also removes this history.

API Permissions API + MediaDevices + MediaStreamTrack + Web Audio API + MediaRecorderPROCESSING BROWSER LOCALSCHEMA inputproof-evidence-v1RAW UPLOAD 0 B

OPTIONAL TIPSImprove repeat checks0/3 checked

Optional. The test works without this; these tips only reduce comparison noise.

MEASUREMENT BOUNDARY

Useful evidence, without pretending to be a laboratory.

Mic level is digital amplitude, not calibrated loudness.

Device labels are normally hidden until media permission is granted.

Speaker quality still needs listening judgment.