I'm new to all of this.  I tried turning on the "Record Audio with Video Cache" to see how it works.  I was disappointed to hear a choppy sound recording when I played it back.  I'm using an OTG cable and a Samsung S7 phone.  I looked in the Samsung settings but did not see anything that might improve the audio.  Suspecting it might be an DJO Go 4 app issue,  I downloaded a free audio recording app from the Play Store. The app is from Samsung for the Galaxy phone.  I ran the audio program on my S7 while filming and found the recording to be clear and void of any choppy audio experienced using the Audio from the Go 4 app.  Any idea how to improve the audio using the DJI Go 4 app?  I can sync the audio from the recroder program, but its a pain.  Thanks for your help.

What version of DJI Go 4 are you using? Try an older version, like 4.1.x or 4.2.x.

Yes, this happens to me too. You can especially notice it when the aircraft is returning to home and the beep-beep sound is quite choppy.