By Abhirup Roy (Reuters) – Sony Music Entertainment, a unit of Sony Corp, has invested $3 million in music-recognition application maker Shazam Entertainment, a source familiar with the matter said. A Wall Street Journal blog post said earlier in the day that Vivendis Universal Music Group and Warner Music Group owner Access Industries had also invested $3 million each in Shazam. (http://link.reuters.com/pet39v) The investments come after Mexican billionaire Carlos Slim invested $40 million in Shazam in July. …