A song sequence is a collection of songs performed in fixed order to describe a progression of feeling.

An Epidrama is a collection of Song Sequences which are usually played in sequence to create a single performance lasting about two hours. The essence or drama is a build up and release of tension and the Epidrama endeavours to use its format to create a dramatic impact on the audience.

Yes, a Song Sequence may have a turning point that marks a build up and release of tension.

Yes, usually there is a resolution near then end at which point the emotions elicited in the Sequence are resolved.