Polyhymnia has been involved in the development of Super Audio CD since 1997, long before the format was launched. Some of the first-ever experimental DSD recordings were made by Polyhymnia Engineer Erdo Groot, using an experimental Philips Electronics recording system. Since then we have been constantly working on SA-CD projects, improving and extending our recording techniques. We offer complete support for SA-CD release, from the original DSD recording, editing and mixing. We include SA-CD text support to produce the final SA-CD authored master for delivery to the factory.