The musicians of the Pittsburgh Symphony Orchestra, which has fallen on difficult economic times in the last few years, are set to vote this week on a new 3-year contract. The agreement calls for a hefty wage cut in the first year in order to allow the PSO to get its financial house in order, but by the third year of the contract, the musicians’ base salary would rise to 95% of the average of four of the highest-paid orchestras in the U.S., a percentage which could guarantee each musician a raise of nearly $20,000 in 2005.