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Sound check
Speaker test
Left and right with a blind check, a phase test for reversed wiring, and a sweep to find your lowest and highest note.
Runs only in this browser. Nothing is recorded, stored or uploaded.
Wearing headphones? Keep the volume low for the first sound.
Left
Right
Blind check
Four sounds on random sides. Say where each one came from.
Phase
Play both. Which sounds fuller and more centred?
Sweep
Bass rises from 20 Hz: press when you first hear it. Treble rises to 20 kHz: press when it vanishes.
-- Hz
- Sample rate
- --
- Output channels
- --
- Output latency
- --
- Highest playable
- --
How to read it
- Blind check
- Four sounds, each on a random side. If you name every one backwards, your channels are swapped.
- Phase
- The in-phase sound should feel fuller and centred. If the out-of-phase one sounds fuller, one speaker is wired + to minus.
- Lowest and highest
- Where the sweep first became audible and where it vanished, for these speakers and your ears together.
- Output
- The sample rate and channel count your browser reports for the current output.
Gear we have tested
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Questions
Is any sound recorded?
No. This page only plays sound. It never asks for your microphone, and nothing leaves the tab.
Left and right are swapped. How do I fix it?
Swap the two speaker cables, or the left and right plugs. On a Mac, Audio MIDI Setup lets you choose which channel feeds each speaker. Headphones worn backwards are the most common cause of all.
Why can't I hear the top of the sweep?
Three limits stack up: the speakers, your ears (the top of human hearing falls with age), and the browser, which cannot play above half its sample rate.
Is it safe for headphones?
Start with the volume slider low, put the headphones on, then raise it. Bass and treble sweeps can surprise you at high volume.
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Photo: Neil Yonamine / Pexels