MistyOne of my fave ffmpeg error messages. I make this mistake a non-zero number of times.
Brooke Vibber 
@misty making this mistake on video tracks makes for ... fascinating results ;)
@brooke The cowardly encoder refused to actually do 320bps and wrote a 120kbps file. I was hoping to hear what it'd sound like.
Robee? Na! 🌈