Fixed some errors with my dectalk protocol implementation. Thanks Codex. :)

src/fenrirscreenreader/speechDriver/dectalkDriver.py

@@ -23,7 +23,7 @@ class driver(hardware_serial_driver):
         return self._setting_command("dv ap", self._scale(pitch, 50, 350))
 
     def _volume_command(self, volume):
-        return self._setting_command("vo", self._scale(volume, 0, 100))
+        return self._setting_command("dv g5", self._scale(volume, 60, 86))
 
     def _setting_command(self, command, value):
         return f"[:{command} {value}]".encode("ascii")

tests/unit/test_dectalk_usb_driver.py

@@ -141,7 +141,7 @@ def test_dectalk_usb_driver_writes_commands_and_speech(monkeypatch):
         assert device.writes == [
             (0x02, b"[:ra 650]", 1000),
             (0x02, b"[:dv ap 350]", 1000),
-            (0x02, b"[:vo 50]", 1000),
+            (0x02, b"[:dv g5 73]", 1000),
             (0x02, b"Hello world\x0b", 1000),
         ]
     finally:

tests/unit/test_hardware_speech_drivers.py

@@ -77,7 +77,7 @@ def test_dectalk_driver_writes_settings_and_cancel(serial_pair):
         speech_driver.set_pitch(1.0)
         speech_driver.set_volume(0.5)
         speech_driver.cancel()
-        expected = b"[:ra 650][:dv ap 350][:vo 50]\x03"
+        expected = b"[:ra 650][:dv ap 350][:dv g5 73]\x03"
         assert read_available(master_fd, len(expected)) == expected
     finally:
         speech_driver.shutdown()