This paper is a systematic investigation of motion expressions in programmatic music description. To address issues with defining the Source MOTION and the Target MUSIC, we utilize Gestalt models (Figure-Ground and Source-Path-Goal) while also critically examine the ontological complexity of the Target MUSIC. We also investigate music motion descriptions considering the role of the describer's perspective and communicative goals. As previous research has demonstrated, an attentional Goal-bias is common in physical motion description, yet this has been found also to lessen due to audience accommodation effects. We investigate whether this also occurs in music description. Using cognitive linguistic frameworks, we conducted an analysis of 21 English speakers' written descriptions of dynamic orchestral excerpts. All participants gave a description of one excerpt reporting their own personal experiences and the other excerpt reporting the events of the excerpt for a fictional future participant. We find that addressee accommodation shapes the choice of the ontological types of Figures used from being more subjective and creative in describing music for oneself versus being more objective in describing music for others. However, our investigation does not find sufficient evidence for a Goal-bias in music like there is in physical motion event descriptions.