A plugin that integrates Azure Speech Cognitive Services into Unreal Engine with simple functions which can do these asynchronous tasks:

• Speech to Text
• .wav File to Text
• Text to Speech
• Text to .wav File
• Text to Audio Data
• Text to Sound Wave
• SSML to Speech
• SSML to .wav File
• SSML to Audio Data
• SSML to Sound Wave

And helper functions:

• Convert File to Sound Wave
• Convert Audio Data to Sound Wave
• Load XML to String
• Qualify Path
• Qualify XML File Path
• Qualify WAV File Path
• Qualify File Extension
• Create New Directory
• Open Desktop Folder Picker
• Check and Add Android Permission
• Is Audio Data Valid
• Check Return from Recognition Map
• Get Available Voices

GitHub: lucoiso/AzureSpeech (github.com)

Forum: [FREE] AzSpeech plugin: Async Text-to-Voice and Voice-to-Text with Microsoft Azure