Not able to record microphone with Game DVR

You should be able to record (the streaming would have some lag, but you should be able to record stuff although it would take some time to properly upload).

If not, the other solution is record with Xbox DVR and then have the microphone to your phone or computer and record there the voice, so later you can mix together the Recorded video on the console and the audio on the other device.

Turn off the game DVR completely. Settings preferences turn off game DVR. Note that with it off all gameplay recording including manual methods like record that and the DVR app will no longer be able to record. Hopefully they will add an option to turn off
just the auto recording.

You can also record your gameplay through Mixer and download it to your PC as well.

You can't record voice through DVR, however if your using Mixer for audio why not record video with Mixer as well.

Hi
Zellcrow,

Thank you for coming to the Xbox forums. Unfortunately, you cannot record your voice using the built in video recording feature. There are some other ways you can achieve this, but it is not possible using the Xbox game clip feature. One way would be to
use a capture card like an Elgato to record your gameplay or you can stream through Twitch and enable archiving, which will save your videos for 14 days that you can then download from Twitch's website to save on your PC or upload to a storage device. I'm
not sure how well this works, but you can also try streaming your gameplay to the Xbox App for Windows 10 and then use a streaming software like OBS to record and save your gameplay. All of this should record gameplay and voice.

I hope this helps!