Pipecat has a pipeline-based architecture. The pipeline consists of frame
processors linked to each other. The elements travelling across the pipeline are
called frames.
To have a deterministic behavior the frames travelling through the pipeline are
awlays ordered, except system frames which are out-of-band frames.
To achieve ordering each frame processor only outputs frames from a single
task. This single task is internally created in each FrameProcessor and the
developer doesn't need to know much about it, except conceptually.
Having a single output task avoids problems such as audio overlapping.
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