I expect audio and Bing STT are handled by the Python SpeechRecognition library:

https://pypi.python.org/pypi/SpeechRecognition/

Python to IFTTT here (using maker channels):

https://github.com/briandconnelly/pyfttt

And then using the logitech universal remote (harmony remote) from IFTTT:

https://ifttt.com/harmony

Although you can also control a harmony remote directly from python:

https://github.com/jterrace/pyharmony

More about the harmony remote here:

http://www.logitech.com/en-us/harmony-remotes