Audio & sound troubleshooting guides.
Step-by-step help for the most common sound problems — no audio, a dead microphone, muffled or crackling headphones, one silent earbud, subwoofers and surround setups. Each guide pairs a plain-English explanation with a free, no-install browser test so you can isolate the fault as you read.
No sound on your computer? How to fix it
Work through mute, the volume mixer, the wrong output device, and the Windows 11 and macOS audio paths in the right order.
Read the guideMicrophone not working on Windows 11?
The #1 cause is a privacy permission, not a broken mic. Fix permissions, input device, levels, and drivers step by step.
Read the guideDiscord mic not working? How to fix it
Set the input device explicitly, tame sensitivity and Krisp, fix Windows permissions, and prove where the fault really is.
Read the guideOne earbud not working? How to fix it
Balance drift, a Bluetooth desync, dirty contacts, or earwax — isolate the cause with a left/right test and fix it.
Read the guideBluetooth headphones connected but no sound?
Connected is not the same as selected. Fix the output device, the A2DP/HFP profile trap, multipoint, and stale pairings.
Read the guideWhy do my headphones sound muffled?
The headset-mode codec trap, EQ processing, earwax, and worn pads — how to tell them apart and clear the mud.
Read the guideCrackling or static in your headphones?
Tell a source-side glitch (clipping, sample-rate mismatch, drivers) from a broken cable or jack, then fix the right one.
Read the guideSubwoofer not working or not hitting?
Cable seating, auto-standby, receiver crossover, phase, and room nulls — a bass test and LFE test find the culprit fast.
Read the guideHow to test surround sound (5.1 / 7.1)
A full check sequence from source format to per-channel test, plus why browser tests may downmix and how to force true 5.1.
Read the guideWhat frequencies can humans hear?
The 20 Hz–20 kHz range explained, the age-related ceiling, the 4 kHz noise notch, and how to test your own hearing range.
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