3 ms·

Maybe the volume button could be used for this

• layer8 4y ago
  That might be possible on Android. But dedicated buttons would be better, to avoid having modes, and because sometimes there are use cases where you want to use both functions (e.g. scrolling through playlists while trying songs with different volume levels). Electronic consumer devices like Minidisc players and PDAs used to often have a multitude of buttons to directly access all commonly used functions.