The Louisville Orchestra, plagued in recent years by budget deficits and labor strife, has announced the formation of a special fund designed to allow the organization to balance its budget for the current season. The orchestra has been keeping its head above water with a special “bridge fund” from the city of Louisville and several private contributors, but that money runs out later this year. In addition to generating new revenue, the orchestra is attempting to dispel what it calls several myths in the community about its business practices and long-term sustainability.