If you are thinking C tuning, remember TOT, they tuned to C because of St Anger if I'm not mistaken. AIA, HTF and ITNOG are all in C. ES is in D, SOC is Eb and TDS is B. Not sure about Vacant.
So yeah, DT are pretty creative with their songwriting and tunings and keys.
Anyway, back on topic, I was listening to Awake in the car today and I forgot how amazing the Mirror was. The repirse is amazing and I might try and make a mix of it too. Amazing song.
Does anyone actually know why they reprised it in Lie? Apologies if it's a n00bish question.