Creator
$19/month
Billed monthly
For solo creators posting every week
500 credits every month
- Up to 250 AI images
- Up to 50 AI videos
- Up to 1.5 hours of AI voiceover
- Roll over up to 1,000 credits
Sound test Left, right, bass and treble
Speakers or headphones. Turn the volume down, then press a side. Each one should play alone.
Free, no account. Each press plays a 1.2-second tone. Nothing is recorded.
Frequency sweep20 Hz to 20 kHz in 30 seconds
One tone climbs from a deep rumble to a thin whistle. Listen for notes that jump out or drop away. Press stop the moment it fades.
20Hz
Turn the volume down before you start. The top end can be sharp. This checks what you hear through this device, not your hearing.
Check the top end, tone by tone
Young ears often reach 18 kHz or more. The limit drops with age, and many adults stop hearing somewhere between 12 and 16 kHz. Small speakers can fade up here too, so a silent tile may be the speaker. This is a listening check, not a hearing test. For that, see a hearing professional.
Bass testWork down until it disappears
Start at 150 Hz and go lower. Each tone gets harder to hear, then turns into a flutter you feel. The last tone you hear clearly is roughly where this setup stops: the speakers, the volume and the room together.
A buzz or rattle on one tone is usually something nearby shaking at that pitch. Touch the shelf or the cable and play it again.
No bass on your laptop?How low each speaker can go
A small driver cannot move enough air for deep notes, so bass fades out below a certain pitch. These are rough floors for each kind of device, not measurements. The exact model, the volume and the room all move them.
A floor here is the lowest pitch a device still plays at a useful level. Below it the sound gets quieter fast rather than stopping dead, so where you hear it end also depends on the volume. Earbuds and headphones only get that low with a good seal.
Stereo sound testA voice, a pass-by and a wiring check
A beep tells you a side works. These tell you the picture between the speakers is right.
Left, center, right
Each tile plays a voice that says where it should come from: left, center or right. Center should sound like it sits between the speakers, not in both boxes at once.
A motorcycle passing by
It starts on your left, passes in front of you and leaves on your right. It should travel smoothly, with no hole in the middle.
Polarity
In phase, the noise sits in one spot and sounds full. Out of phase, it spreads wide and loses bass. If In phase sounds like that, one speaker may have its red and black wires swapped. Turn the amplifier off, check red to red and black to black at both ends, then play In phase again.
Speaker test with musicHear each range on its own
A tone shows range. Music shows balance. Play a track, then switch to the bass, the mids or the treble while it runs.
Everything at once. Nothing should rattle, buzz or crackle.
Sound test failed?Find the fix by what you hear
- No sound at all
Usually the computer is sending sound to another output, such as a monitor, a dock or a Bluetooth device that is out of range.
Pick your speakers or headphones as the output device, unmute the browser tab, then press a test again.
- One side is silent
Most often the balance slider is pushed to one side, a cable is half in, or one speaker or earbud is off.
Center the balance, reseat the plug, then swap the left and right cables. If the silence moves with the cable, the cable is the fault.
- Left and right are swapped
Usually the speakers stand on the wrong sides, or the headphones are on backwards.
Check the L and R marks on the speakers and the cups. On a receiver, swap the two speaker leads.
- Left plays in both ears
Most often mono audio is on. It folds both channels together, which is useful with one ear but hides stereo. A speaker's or receiver's own mono, party or all-channel mode does the same.
Turn off mono audio in the settings below and any such mode in the speaker's app or on the receiver, then press L again. Still on both sides? Try another stereo output, such as wired headphones. If those split left and right, this device likely has a single speaker.
- Buzz or rattle on one bass tone
Something near the speaker vibrates at that pitch: a shelf, a loose panel, a cable on the cone. Less often the speaker itself is worn or torn.
Turn the volume down and play that tone again. Touch nearby objects, then move the speaker off the shelf and away from the wall. If the buzz follows the speaker at low volume, it may be damaged and is worth having checked.
- Bass sounds thin
The speaker may be too small to play it, the earbuds may not be sealed, or the speakers may be wired out of phase.
Check the device chart above, try a larger ear tip, and run the polarity test.
Where to find balance and mono audio
Windows 11
Settings, System, Sound, pick the device, then the Left channel and Right channel sliders. Mono audio is under Accessibility, Audio.
macOS
System Settings, Sound, Output, then the Balance slider. Mono audio is under Accessibility, Audio.
iPhone
Settings, Accessibility, Audio and Visual, then Mono Audio and the Balance slider.
Android
Settings, Accessibility, then Audio adjustment or Hearing enhancements, depending on the phone. Look for Mono audio and Audio balance.
Simple pricing that scales with you.
Pick the plan for how much you post. Every model on every plan. Unused credits roll over. Cancel anytime.
Pro
Most popular$49/month
Billed monthly
For creators posting daily across channels
1,300 credits every month
- Up to 650 AI images
- Up to 130 AI videos
- Up to 4 hours of AI voiceover
- Roll over up to 2,600 credits
Studio
$99/month
Billed monthly
For brands and production teams
2,700 credits every month
- Up to 1,350 AI images
- Up to 270 AI videos
- Up to 9 hours of AI voiceover
- Roll over up to 5,400 credits
Scale
$199/month
Billed monthly
For agencies running always-on content
5,500 credits every month
- Up to 2,750 AI images
- Up to 550 AI videos
- Up to 18 hours of AI voiceover
- Roll over up to 11,000 credits
Every plan includesEvery model, 90+ and countingReusable AI personasSceneform Studio editorCommercial usage rights
Want checkout, comparison tables, or a custom volume? See the full pricing page
Sound testCommon questions
Turn the volume down, then press L and R at the top of this page. Each side should play alone. Then run the frequency sweep and a bass tone to check range, and play a music track to hear everything together.
Mono audio is probably on. It mixes both channels into each side. Turn it off in your accessibility settings. A device with a single speaker, like most phones held upright, cannot separate left and right.
Most likely your speakers cannot play them. Phones usually stop around 300 Hz and laptops around 150 Hz. Below 30 Hz most people feel the tone more than they hear it, even on a subwoofer.
Young ears often reach 18 kHz or more. The limit drops with age, and many adults stop hearing somewhere between 12 and 16 kHz. The sweep shows where the tone fades through the speakers and volume you have now. It is a rough listening check, not a hearing test.
Yes. Every test here works the same with headphones. For bass, push the tips in for a full seal first. For left and right, check the L and R marks before you start.
Yes. Every test on this page is free and needs no account. Making your own voiceovers, music and sound effects in Sceneform is part of a paid plan. Plans start at $19 a month with 500 credits.
No. It only plays sound through your selected output. It never asks for microphone or camera access.
Yes, at a low volume. Start quiet and turn up slowly. Very low and very high tones can sound quiet while still pushing a speaker hard, so stop if you hear distortion.
Speakers sortedNow the sound in your video
Sceneform makes voiceovers, music and sound effects from a line of text, then puts them on your video.
Voiceovers
Type a script, pick a voice, and download the read as an MP3.
AI voice generatorMusic
Describe a mood, a tempo and a length, and get an instrumental track.
AI music generatorOn your video
Place a track or a voiceover on the Studio timeline, set its volume against speech, and fade it in and out.
Add music to video