Not a FOSS but I've been using Poweramp for years without issue and it shows the waveform along with other features, downside is that it's a paid app.
Also "My time to shine..." or something along those lines implying that they are the expert of current topic
I need to survive for 3 days without pooping, and eating as little as possible. I can pee, but not very often. It can't take up too much space. What food do I pack?