The maximum power supply voltage for the TL072CDRE4 is ±18V, or 36V total.
Yes, the TL072CDRE4 is suitable for audio applications due to its low noise and distortion, and high slew rate.
Yes, the TL072CDRE4 can be used in a single-supply configuration, but the input common-mode voltage range is limited to VCC-2V to VCC+2V.
The input impedance of the TL072CDRE4 is typically 1MΩ, but can be affected by the input bias current and input capacitance.
While the TL072CDRE4 can be used as a comparator, it's not the best choice due to its relatively slow response time and limited output current capability. A dedicated comparator IC would be a better choice.