Left Right Audio Test – Earphone & Speaker Check
Left / right channel check- L plays only from the left side
- R plays only from the right side
- Wrong side = channels swapped
Left Right Audio Test
This left right audio test plays sound in one channel at a time, so you can confirm your earphones, headphones or speakers play on the correct side.
Left & Right
Two big buttons play pink noise in one channel at a time.
Headphones & Speakers
Works with earphones, headsets, laptop, phone and Bluetooth speakers.
Nothing to Install
Runs in your browser on Android, iPhone, Windows and Mac.
How to Run a
Left Right Audio Test
- 01
Lower the volume
start at about 30%.
- 02
Press L
sound should come only from the left earphone or speaker.
- 03
Press R
sound should come only from the right side.
- 04
Press Both
the sound should sit in the centre.
Left and right swapped or one side silent
- Sound on the wrong side: the earphones are worn the wrong way round, or the speaker cables are swapped. Check the L/R marks.
- One side silent: push the plug fully in, check the balance slider (Windows: Settings → System → Sound; Mac: System Settings → Sound → Balance) and turn off Mono audio.
- Both sides equal on L or R: Mono audio is on in accessibility settings, or the device has only one speaker.
For phase, sweep and bass, use the full speaker test. For panning and imaging, use the stereo test.
Frequently Asked Questions
Q.How do I test left and right audio?
Press L, then R. Each should play only from its own side. If the sides are reversed, the channels are swapped.
Q.Why does my left earphone not work?
Usually a loose plug, a moved balance slider, Mono audio or a broken cable. Test with another device to narrow it down.
Q.Does it work on a phone?
Yes, on Android and iPhone. On iPhone turn off silent mode first.
Q.Do Bluetooth earbuds work?
Yes. Connect them first; each bud should play its own channel.