If I switch to Camera after using Test Tone, pulsating audio noise is recorded. Or there is noise on the headphone monitor audio.
Every time you finish using Test Tone,
• “turn off Color Bar (turn off Test Tone)” for the moment =>“switch to Playback mode” => switch back to Camera mode.
• Or “turn the power off and then on again”.
Then start recording.
If you use Test Tone while you remain in Camera mode, the above-mentioned problem occurs on rare occasions and the symptom continues until you switch to Playback mode or reboot the camera.
This is planned to be fixed by the next update (scheduled for the end of November). (As of August 23, 2017)
Updated: August 2017