I’ve tried converting an M4A file into a WAV file a couple of different ways and I can then drag-and-drop the WAV file into Audacity but when I try to play it, a pop-up window says “Error opening sound device. Try changing the audio host, playback device and the project sample rate.” Brand new to Audacity, I appreciate any help. Thanks.
Error opening sound device.
That just means it tried to play to your speakers or headphones and couldn’t find them.
Are you playing to your computer built-in soundcard or speakers?
Did your wireless headphones go off-line briefly? Those can cause a lot of trouble.
Try doing Transport > Rescan Audio Devices, then set your output device (speakers, headphones, etc.) in your Device Toolbar