Check both speakers and your microphone before a call, in under a minute
Processed in your browser. Nothing is uploaded. Updated on 24 Oct 2026.Discovering your microphone was muted during the call is too late. This checks both in under a minute: a tone through each speaker, then 5 seconds recorded and played back to you. Nothing is uploaded, and the recording stays on your device.
On the Speakers tab, press Play beside Left channel, Right channel and Both channels in turn.
Answer Yes or No to each question; the Speaker check list shows which side is working.
Open the Microphone tab, press Start the microphone check and allow the microphone.
Speak and watch the waveform and Verdict, then press Record 5 seconds and Play it back to hear yourself.
This page runs the four checks that answer "is my audio working" before a call starts. A tone plays through the left speaker alone, then the right alone, then both together. The microphone shows a live waveform and a level meter with a verdict. And a five second record and play back lets you hear what the other end will hear.
If both channels played the same frequency, somebody with their headphones on backwards would hear the same thing twice and learn nothing. The left tone is 440 Hz and the right is 660 Hz, so a swap is audible even to a listener who cannot reliably tell which ear a sound is in. The third step plays both together at a third frequency, which catches a balance control that has drifted off centre.
The meter reads the level in decibels relative to full scale and sorts it into five bands. Silence below -55 dBFS means nothing is arriving: check that the right input is selected, that no other application has taken the microphone, and that the device is not muted in hardware. Between -55 and -40 is very quiet, and at that level noise suppression on a call will cut the ends off your words. Between -40 and -12 is a good working range. Above -12 is louder than it needs to be, and a peak that reaches full scale is clipping, which squares off the loudest parts of your voice and cannot be repaired afterwards.
The five second recording is held in memory inside this page. Nothing is written to a file, nothing is uploaded, and it is discarded when you press clear or leave the page. The microphone track is stopped whenever the tool is idle, which is what makes your browser's recording indicator switch off. Permission is only ever requested after you press a button, never when the page loads.
Related tools: Sound Level Meter, Frequency Response Sweep, Room Echo.
Press start, allow the microphone when the browser asks, and speak normally. The waveform should move and the meter should sit in the good band. Then record five seconds and play it back, because hearing yourself catches problems a meter cannot, such as a fan or a keyboard drowning your voice.
Three causes cover almost every case: the browser was never given microphone permission, another application has taken exclusive control of the device, or the input level is so low that noise suppression removes what remains. Silence on the meter here points at the first two; a very low reading points at the third.
Run the channel test, which plays 440 Hz through the left speaker alone, then 660 Hz through the right alone, then a third note through both. Different frequencies on each side mean a swapped pair is audible even if you cannot tell which ear a sound came from.
Clipping means the loudest parts of your voice reached the maximum the recording can represent and were squared off. The result sounds harsh and crackly and cannot be repaired afterwards. Lower the input level in your system sound settings, or move back from the microphone by a few centimetres.
No. The short recording lives only in the memory of this page, is never written to a file, and is discarded the moment you press clear or close the tab. No audio is sent to any server, which is also why the tool works with the network disconnected.
The indicator stays on while any microphone track is open. Pressing stop releases the track and the indicator goes out within a second. If it stays on after that, another tab or another application is using the microphone, not this page.
Still stuck? Ask about Speaker and Mic Test and anybody who knows can answer. No account needed.
Same job, other tools: Speaker Frequency Response Test – Compare two speakers in the same spot and see which holds its bass · Frequency Generator – Generate a steady test frequency for speakers, headphones or instruments · Audio Sweep Generator – Play a slow logarithmic sweep and hear every rattle in the room · Increase Audio Volume – Raise a quiet recording as far as it will go before anything starts to distort · Speed Up Audio – Make audio faster or slower without the chipmunk voice · Sweep Tone Generator – Sweep smoothly between two frequencies over a time you choose.
Also works as: Test My Microphone · Speaker Test.
In the collection Audio Test Tools.