Google updates its Play Music streaming app with new playback quality options over Wi-Fi and for downloaded tracks. You can now choose between low, normal, high, and always high. Before you could only adjust playback quality for streaming when you were using mobile data. It doesn’t say, though, what bitrate these options correspond to. But if you seek the highest quality the app offers, then you at least have the choice to do so now. The update comes to both iOS and Android versions of the app.
Source: Engadget