It is possible to successfully and reliably get an external microphone working with the Osmo Pocket gimbal camera. I’ll show you what it sounds like with a small external mic and a pro level Audio Technica. It’s a big difference when compared with the internal microphones, which still aren’t too bad. There are audio samples and A/B comparisons.
The biggest problem is the system doesn’t work with all microphones. It does work with the DJI FM-15, which provides significant improvements in audio quality, wider dynamic range and much more neutral response. Here’s the video:
Here’s the Audio Technica Pro 24-CM mounted on the camera:
And here are the specs for the Audio Technica microphone: