I just started using SeeMusic and it's great. However, I recorded an audio file with my piano and if I import this file into the desktop app, it doesn't play it. The strange thing is: all the other audio files are playing. It's just this specific file that isn't playing the audio. It is a .wav file like the others and my audio is definitely on. What am I missing here?

It could be that it has a + in the filename.
Please try taking out the + and see if it works? I'm about to post an update and would be good to know if this is the issue, as I'll add a fix - please let me know ASAP.
Thank you
Yes this was the problem. Thank you so much!!