Interpret dBFS, SNR, latency and distortion only within the route and processing settings shown in Evidence.
IP-AUD-01 / PCM LEVEL / DEVICE PATH
Speaker and Headphone Channel Test
Play left, center and right reference tones through the selected browser output route.
Stereo channels are swapped, missing or routed to the wrong device.
This focused entry uses the shared Audio protocol. The measurement logic and Evidence version remain identical to the complete lab.
Remove the easiest false alarms first.
01
Close calls and recording apps, select the intended route and keep system gain fixed.
02
Use a moderate safe volume and avoid changing microphone distance during a protocol.
03
Treat acoustic and confirmed fixed-gain loopback sessions as different measurement paths.
Run one repeatable protocol.
- 01
Select the intended output when browser routing is supported.
- 02
Play left, center and right at a safe volume.
- 03
Confirm the perceived position and compare a wired route.
Evidence the result should expose.
DIRECT / INFERREDSelected output
DIRECT / INFERREDRoute status
DIRECT / INFERREDL/C/R reference tones
Separate observed, review and inconclusive.
Repeat with fixed gain, then compare wired, Bluetooth and direct loopback paths one variable at a time.
Acoustic measurements include speaker, room, microphone, OS and browser; they are not device specifications or hearing diagnoses.
Start with the likely path, then retest.
01
Swapped wiring
02
OS balance
03
Unsupported output routing