Genesys Cloud provides dual operational modes within the Edit Audio Sequence dialog box for constructing audio sequences: Sequence Builder mode and Custom Expression mode. The Sequence Builder enables users to combine text-to-speech, prompts, and data actions with mode-specific configuration options, while Custom Expression mode offers advanced functionality through access to comprehensive Function and Operator help resources, including element lists, descriptions, examples, and sample outputs. Users can transition between modes while maintaining their work, with the exception that switching from Custom Expression to Sequence Builder will reset the configuration rather than interpret custom expression text. The dialog box heading identifies the context of the audio element being edited, whether for menu prompts, initial greetings, or action-associated audio sequences. Key capabilities include inline text-to-speech entry, prompt selection from available library options, and direct audio element access for expression building. Primary use cases encompass configuring menu prompts, greetings, and action audio sequences. Users can enter simple audio strings for text-to-speech playback or add sequences through dedicated edit audio sequence buttons in audio configuration fields. The Custom Expression Builder displays expressions generated from Sequence Builder configurations, and users can copy and paste audio examples from help documentation into the audio sequence design form and modify them as needed. This dual-mode functionality allows users to view the expressions Genesys Cloud Architect generates from sequence builder configurations while maintaining flexibility to work in either builder mode according to their workflow preferences. Comprehensive related documentation covers expression editing, expression help access, audio sequence setup and management, and voicemail system greeting replacement procedures.