I wonder if it's possible to let Tower 2011 use a different TTS voice other than the default Microsoft Anna. I added some system TTS voices following the instructions here https://forums.robertsspaceindustries.com/discussion/147385/voice-attack-getting-free-alternate-tts-voices-working-with-win7-8-64bit but it doesn't seem to work in Tower 2011.
I don't know if it's a sound driver issue again...
System specs:
i5-3570k, 16GB RAM, NVIDIA GTX 750Ti, Realtek HD integrated sound card, Logitech G430 headset
Windows 7 64-bit Professional, en-US
The additional TTS voices I installed works fine in other Windows applications; they just don't work in Tower 2011.