Fabric tensile structures are a common architectural response to the need for an outdoor performance venue because they provide a lightweight, durable shelter, capable of spanning large distances. Particular care is necessary when threading the needle between efficient structural form and functional acoustic performance. This paper will discuss the acoustic design considerations necessary to yield the best acoustic results when designing outdoor fabric tensile structures. Concepts such as geometry, materiality, and amplified audio will be explored through the story of a few project examples.