SANTA CLARA, Calif. -- The San Francisco 49ers have been sending themselves musical messages all week.Every week before a road game, the 49ers play music during practice to prepare for the crowd noise. That is of particular importance this week as the 49ers prepare to play Sunday at Seattle in the NFC Championship game. Seattle's CenturyLink Stadium is known as the loudest stadium in the NFL.As the 49ers pump the music, they are trying to get themselves motivated.