Piper TTS plugin for Unreal via simple CLI wrapper.

1. Grab latest release and extract plugins folder into your project root folder.

2. Download and extract PiperWin64-2023.11.14-2.7z link into ThirdParty/Piper/ in your PiperCli-Unreal plugin root folder.

3. Download voice model from https://huggingface.co/rhasspy/piper-voices/tree/v1.0.0 e.g. for https://huggingface.co/rhasspy/piper-voices/tree/v1.0.0/en/en_US/joe/medium place en_US-joe-medium.onnx and en_US-joe-medium.onnx.json in your PiperCLI-Unreal/ThirdParty/Piper/Win64/model/ folder.

4. Start your unreal project

5. Add Piper component to your actor of choice. Edit PiperParams model model/en_US-joe-medium.onnx

v0.3

4. Subscribe to OnOutputBytes(Piper) and convert your sound data from PCM to WAV to Unreal SoundWave using e.g. SocketIOClient Plugin's core utility functions https://github.com/getnamo/SocketIOClient-Unreal/blob/master/Source/CoreUtility/Public/CUBlueprintLibrary.h#L90.

v0.4

4. Subscribe to OnAudioGenerated which output USoundWave* outputs instead of PCM bytes.

5. Play SoundWave. Optionally use USoundWaveQueueComponent to queue up all the soundwaves being generated faster than real-time and play them back at target world location in sequence.