Stereo Channel Test

Test left and right audio channels to ensure proper stereo separation and balance

🔊 Volume Safety Notice

Start at low volume (20% recommended) to protect your hearing. The test uses clear tones that don't require high volume.

L

LEFT

Ready to test

R

RIGHT

Safe (0-30%) Moderate (30-70%) Loud (70-100%)

🔊 Test your volume first:

How This Test Works

1

Individual Channel Tests

Click "Test LEFT Channel" or "Test RIGHT Channel" to play a voice saying "Left" or "Right" in the respective channel only.

2

Alternating Test

Automatically switches between left and right channels with voice announcements.

3

Sweep Test

A tone that moves smoothly from left to right and back, testing stereo imaging.

4

Music Test

Sample music with clear stereo separation to test real-world performance.

What to Check For:

✓ Good Results:

  • • Sound comes from correct side
  • • Both channels equally loud
  • • Clear stereo separation
  • • Smooth panning in sweep test

✗ Problems to Find:

  • • No sound from one side
  • • Reversed channels (L/R swapped)
  • • One side quieter
  • • Both sides play same (mono)

Common Stereo Issues & Solutions

No Sound from One Channel

If you hear nothing from left or right:

  • Check cable connection - may be partially unplugged
  • Test with different headphones/speakers to isolate issue
  • Check audio balance settings in your device
  • For wired headphones, wiggle cable near plug to check for breaks

Reversed Stereo (L/R Swapped)

If left plays in right ear and vice versa:

  • Headphones may be worn backwards
  • Wiring is reversed (common in cheap cables)
  • Audio settings may have "reverse stereo" enabled
  • Some headphones have L/R markings that are hard to see

Imbalanced Volume

If one side is quieter:

  • Check system audio balance settings
  • Clean headphone jack and plug
  • Driver may be damaged or worn
  • Ear wax buildup in earbuds (clean carefully)

Mono Instead of Stereo

If both channels play the same:

  • Mono mode may be enabled in accessibility settings
  • Using a mono cable or adapter
  • Audio source may be mono
  • Damaged cable combining channels

More Audio Tests

Frequency Response Test

Test full frequency range 20Hz-20kHz

Bass Test

Check low frequency performance

Microphone Test

Test mic input and quality