Sound Test
Press Play after choosing a channel. Keep system volume moderate—sine tones can be loud.
L
R
Now playing: Idle
If only one side plays on Both, suspect wiring, TRS mapping, or Bluetooth—use Ping‑pong to hear hard panning.
How to use
- Choose channel routing (including ping‑pong) before pressing Play unless you purposely want silent retargeting mid-session.
- Adjust Frequency and Volume sliders; during sweeps Frequency follows automation automatically.
- Sweep locks manual frequency edits until playback completes.
- Changing the channel dropdown while audio runs restarts playback with new routing mirroring KeyboardTester UX.
FAQ
Why does Ping‑pong still output both drivers sometimes?
True hard panning relies on StereoPanner in Web Audio plus proper hardware routing—some mono bluetooth modes collapse channels.
Overview
The implementation dual-runs sine oscillators into a stereo merger so level meters can mimic left/right excitation akin to Hardware loopback testing without requiring ASIO-exclusive drivers—ideal for diagnosing swapped TRS conductors or headsets missing one driver.