One annoying bug in Maya 2020 is that audio playback can be troublesome. Scrub through the timeline and you get audio playback. However, press play and there is no audio playback. Fortunately, after Googling the problem I found a
discussion thread that solves the problem.
Assuming that your Evaluation
Mode is set to DG (check your preferences to find this. Go to Preferences / Settings / Animation / Evaluation / Evaluation Mode), and change DG to Parallel. Then right-click on your timeline and disable "Cached Playback". Once this is done, you should get audio back in Maya when you press play.