title: SFML SoundBuffer to Music buffer
body: <p>I have SoundBuffer. I want this buffer move to Music.
  For now I save in file and read out, but I don't want saving. What can I do?
  Now I have this code:</p>
  
  <pre><code>sf::SoundBuffer sb = getSoundBuffer(new_channels,sample_rate);
  sb.saveToFile("sound.wav");
  std::unique_ptr&lt;sf::Music&gt; Buffer(new sf::Music());
  Buffer-&gt;openFromFile("sound.wav")
   musicAlias[alias] = std::move(Buffer);
  ...
  music-&gt;selected = musicAlias[alias].get();
  </code></pre>