CHANNEL TEST

Left / Right Channel Test

Use rhythmic beeps to quickly identify the left and right channels of headphones or speakers.

Click Left, Both or Right to confirm channel direction with rhythmic beeps.
Shortcuts←Left↓Both→RightSpaceBoth
Advanced TestsBeep
Phase TestStereo

In phase should sound stable and centered; out of phase sounds thinner and wider, useful for checking wiring or channel processing.

TroubleshootingHeadphones
  • Only the left ear should play the left channel, and only the right ear should play the right channel.
  • If left and right are swapped, check headphone orientation or system channel settings.
  • If one side is silent, check the plug, Bluetooth connection or channel balance.
Rhythm CodingLeft is one beep, right is two beeps, and both is a long tone for easier recognition.
Hard Channel OutputUses the Web Audio API to output separately to the left and right channels.
Protect Your HearingDefault volume is 20%; start low before testing.