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This section describes the design and implementation of the sound component of the audio formatter. AFL variables *current-audio-state* and *global-audio-state* represent the local and global states of this component. Here, state is a point in sound space. The sound component provides operators for constructing new points. AFL assignment statements can be used to set the local and global states of the sound component in a manner similar to that described in the case of the speech component. The local scope introduced by AFL blocks also applies to *current-audio-state*.