Timeline with audio and recorder tracks

Hi,
I'm regularly making video shorts and I must always sync my video to my audio in a separate software because I cannot use a Recorder track to record the rendered video and the audio at the same time because the audio continues playing at the normal rate even if I get 5 fps because the Recorder is writing to disk while rendering the video. It makes the audio totally unusable. Is there a way to tell Timeline to keep the video and the audio in sync for the Recorder to encode the right audio at the right time of the video?

As an example: I have a video where there is a latch with a handle that must be turned to unlock the latch. I trigger the turning sound at the same time I trigger the turning animation, but because I don't get the full 60 fps while the Recorder is active, the sound finishes playing waaaaayyyy before the handle stops spinning. which makes for a rather unimpressive effect.

How can I avoid that?

Thanks