No Audio Playback in Maya 2020

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. 

Grey Screen Playback Problem Maya 2018

The video above addresses an odd grey screen playback problem with Maya 2018. You open up your shot, press play, and the screen goes grey - i.e. you can't seen anything. Scrub through the timeline and the same thing happens. It's like putting on a pair of blackout shades - you can't get any work done. The only solution I have found is to open up the same shot in Maya 2017, and, under the Renderer menu in the Viewport, select Legacy Default Viewport (an option which has been disabled for Maya 2018).

How Do You Re-Set Your Preferences in Maya?

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Maya can be a bit buggy and there will be times when, if it isn't working right, you need to
reset your preferences, and start from scratch.

So how do you reset your preferences in Maya? In Windows it's a pretty easy process, though on a Mac it can be trickier.