Snippets from Wikipedia...

Now we know why we didn't hear Alice during the day:

"To make the Oktoberfest, and especially the beer tents, once again friendly to older people and families, the concept of the "quiet Oktoberfest" was developed in 2005. Until 6:00 PM, the tents only play quiet music, for example traditional wind music. Only after that will Schlager and pop music be played, which has led to more violence in earlier years. The music played in the afternoon is limited to 85 decibels. With these measures, the organizers of the Oktoberfest hope to curb the over-the-top party mentality and preserve the traditional beer tent atmosphere."

Some other interesting facts....

After 2004 the queues for toilets became so long that the police had to regulate the entrance. To keep traffic moving through the restrooms, men headed for the toilets were directed to the "Pissoir" (giant enclosed grate) if they only needed to urinate. The number of toilets was increased in 2005 by 20%. Now approximately 1,800 toilets and urinals are available.

Many Oktoberfest guests visit the quiet stalls in order to use their cell phones. For this reason it was planned in the year 2005 to install a Faraday cage around the toilets and to prevent telephoning with a mobile telephone. However such constructions are not certified in Germany, and so instead signs were placed warning toilet users not to use cell phones in the stalls.

http://en.wikipedia.org/wiki/Oktoberfest

Enjoy... learn... drink.