How to record sound from stereo mix and microphone using ffmpeg?

Question

Audio

Hello.
To record audio from a computer (with a stereo mix) I use this command:
ffmpeg -f dshow -i audio="Stereo Mixer (Realtek High Definition Audio)" output.mkv
How can I extend this command to record audio from a microphone too?
I tried using this command:
ffmpeg -f dshow -i audio="Stereo Mixer (Realtek High Definition Audio)" output.mkv -f dshow -i audio="My microphone name" output.mkv - to achieve my goal, but in output.mkv I didn't hear sound from stereo mix
Thank you.

UPD:
I tested a new command:
ffmpeg -f dshow -thread_queue_size 1024 -i audio="Mic Kit (Realtek High Definition Audio)" output.mkv
This command produces:
Queue input is backward in time
Queue input is backward in time.94x