- Stream audio directly to device via BufferedWaveProvider (no temp WAVs)
- Add Noise/Speed/NoiseW sliders with live value labels
- Sliders reinit engine on MouseUp (not Scroll) to avoid locking
- Add text input field with Speak button for direct synthesis
- Test button uses text input if non-empty
- Fix sentence terminator auto-append (espeak-ng final-word drop)
- Fix UTF-8 text marshaling (piper_synthesize_start keeps text ref)
- Fix voice catalogue language column (JSON snake_case mapping)
- Use piper_default_synthesize_options for model-specific defaults
- Fix nullable warnings in designer files
- Fix unused _playing field in AudioOutput
WinForms tray app that captures text (from file or direct input) and
synthesizes speech via libpiper (Piper TTS), outputting to any audio
device (VB-CABLE for virtual mic routing).
Features:
- Global PTT hotkey (configurable F1-F12) via WH_KEYBOARD_LL
- Text file sequential reader (line-by-line on each PTT cycle)
- Direct text input with Speak button
- Voice manager: browse 147-voice Piper catalogue, download, remove
- libpiper P/Invoke wrapper with UTF-8 marshaling, streaming chunks
- BufferedWaveProvider streaming playback with trailing silence flush
- Sentence terminator auto-append (fixes espeak-ng final-word drop)
- Tray icon with minimize-to-tray
Architecture:
- Robovoice.Core: ITtsEngine, ISttSource interfaces, voice catalogue
- Robovoice.Tts.LibPiper: P/Invoke wrapper for libpiper.dll
- Robovoice.Stt.File: text file STT source (testing without mic server)
- Robovoice.Stt.Udp: UDP client stub (for future Linux mic server)
- Robovoice.App: WinForms UI, orchestrator, PTT hotkey, audio output
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