New hardware synth support added. Untested, so consider this experimental.

README.md

@@ -79,7 +79,15 @@ Fenrir is a Linux screen reader. Linux is the only officially supported platform
    - python-speechd
 2. **genericDriver** - Generic subprocess speech driver
    - espeak or espeak-ng (or any TTS command)
-3. **debugDriver** - Debug speech driver for testing
+3. **dectalkDriver** - Serial DECtalk-compatible hardware speech driver
+   - RPITalk gadget mode or a DECtalk-compatible serial device
+4. **litetalkDriver** - Serial LiteTalk-compatible hardware speech driver
+   - RPITalk gadget mode or a LiteTalk-compatible serial device
+5. **doubletalkDriver** - Serial DoubleTalk LT-compatible hardware speech driver
+   - DoubleTalk LT; does not support the internal DoubleTalk PC card
+6. **tripletalkDriver** - Serial TripleTalk-compatible hardware speech driver
+   - External DB9 serial TripleTalk devices, or USB models that expose a tty serial device
+7. **debugDriver** - Debug speech driver for testing
    - No dependencies
 
 
@@ -447,7 +455,13 @@ setting <action> [parameters]
 - `speech#volume=0.1-1.0` - Speech volume
 - `speech#voice=voice_name` - Voice selection (e.g., "en-us+f3")
 - `speech#module=module_name` - TTS module (e.g., "espeak-ng")
-- `speech#driver=driver_name` - Speech driver (speechdDriver/genericDriver)
+- `speech#driver=driver_name` - Speech driver (speechdDriver/genericDriver/dectalkDriver/litetalkDriver/doubletalkDriver/tripletalkDriver)
+- `speech#hardware_device=auto` - Hardware synth serial device for dectalkDriver/litetalkDriver
+- `speech#hardware_baud_rate=9600` - Hardware synth serial baud rate
+
+USB hardware synths are supported only when Linux exposes them as a serial tty
+such as `/dev/ttyACM0` or `/dev/ttyUSB0`. A USB-only TripleTalk with no tty
+device would require a separate USB protocol driver.
 - `speech#auto_read_incoming=True/False` - Auto-read new text
 
 *Sound Settings:*