stereoheadphoneschannels
Check left and right audio on iPhone
A short SignalProof channel check for stereo headphones and speakers, with setup checks for mono audio, balance and output routing.
Guides
Practical audio checks, explained plainly.
Start with speaker buzz, left/right direction, or a speaker-level comparison. Each guide explains the setup, steps and what to save for the next check.
speaker-buzzrattleretest
Find and repeat a speaker buzz with your iPhone
Use SignalProof 1.1.0 to mark a rattle frequency, replay it for 10 seconds, and save an independent retest after one change.
pink-noisespeakersroom-check
Using pink noise for speaker level checks
Compare stereo speaker levels with SignalProof pink noise and a separate meter, keeping volume, position and meter settings fixed.
test-tonessound-meterworkflow
How to use repeatable test tones without overclaiming accuracy
Use SignalProof as a controlled signal source while keeping acoustic sound pressure claims tied to what the measurement setup can actually prove.
Local-first audio testing
Run your next audio check with SignalProof.
Generate a tone, noise profile, or sweep, then record enough context to compare speakers, rooms, windows, doors, or meter readings later.