The Charlotte Symphony strike is a month old today, with no signs of movement from either the CSO management, or the musicians. The latest round of talks, which concluded Friday, left the sides seemingly as far apart as they were a month ago. Four sets of concerts have been cancelled, and starting this week, the strike will affect the city’s opera and ballet companies, which employ the CSO as a pit orchestra. However, the orchestra’s contracts with the opera and ballet say nothing about strikes, so the two groups are likely to hire the CSO musicians on a freelance basis.