FREE ONLINE TEST

Online microphone test

Q: Do I need to install anything?

No. The test runs directly in a supported web browser.

Q: Does ACC64 save my test results?

No account is required. Hardware tests run locally in your browser unless a tool clearly requires a server connection, such as the Internet speed test.

Q: Does one bad reading mean the device is faulty?

No. Repeat the test several times under similar conditions. A problem that appears consistently is a stronger reason to check settings, the connection, or the hardware itself.

Q: Why can results differ between browsers?

Browsers can expose different APIs, handle permissions differently, and report some parameters in different ways. An unavailable function is not proof that the device is defective.

Check microphone input level, playback and recording without installing software.

Start test

Test without installing software

ACC64 runs directly in a modern web browser. You do not need to create an account or install additional software.

Follow the instructions shown in the tool. If the issue is intermittent, repeat the test several times.

How to run a detailed microphone test

Select the correct microphone and start the test.
Stay quiet for the first second so background noise can be estimated.
Then speak normally and watch the spectrum, RMS, peak, signal level and SNR.
Play the 5-second recording and listen for clipping, hum, crackles or dropouts.

A low noise floor with speech clearly above it is a good result. Peaks close to 0 dBFS can clip; very low speech level usually means low input gain or too much distance.

Windows and macOS microphone diagnostics

Windows: Settings → System → Sound → Input; choose the microphone and check input volume. Then Settings → Privacy & security → Microphone and allow browser access. If the device is missing, check Device Manager → Audio inputs and outputs / Sound controllers and update or reinstall the driver.

macOS: System Settings → Sound → Input; choose the microphone and adjust input volume. Then Privacy & Security → Microphone and allow your browser. For unstable USB audio, reconnect the device and check Audio MIDI Setup.

Discord, Teams and Zoom

Discord: User Settings → Voice & Video → Input Device; select the same mic as ACC64 and review input sensitivity. Teams: Settings → Devices → Microphone; run a test call. Zoom: Settings → Audio → Microphone → Test Mic; disable automatic volume adjustment if it pumps the level.

If ACC64 works but one app does not, the cause is usually that app's device selection, permission or noise-processing settings.

Common problems

Too quiet: raise input gain or move closer. Clipping: reduce gain. Hum: test another cable/USB port. Fan noise: move the microphone closer to your mouth and farther from the noise source. Permission blocked: use the padlock/site settings and allow microphone access.

Frequently asked questions

What does this test check?

The test shows microphone input level, lets you make a short recording and play it back, and helps confirm that the device is working.

Do I need to install anything?

No. The microphone test runs directly in a modern browser.

Does ACC64 save my test results?

No. The microphone audio and test recording stay in your browser unless you choose to download the sample to your own device.

Does one bad reading mean the device is faulty?

Not by itself. Repeat the test with the same microphone and settings. If the same clipping, low level or noise problem keeps coming back, check the input level, connection and microphone.

Why can results differ between browsers?

Browsers handle microphone permissions and audio processing differently, so levels can vary slightly. If something looks wrong, compare the result in another browser before blaming the microphone.