Audix - ADX51

Id recommend any of these sorted from most expensive to least expensive Neumann TLM 102 condenser - $800 Shure KSM 8 dynamic - $400 Audix ADX-51 pencil condenser - $210 Shure Beta 58 dynamic - $180 Shure SM58 dynamic - $100 Realistically if this is a one time use deal just go buy a used SM58 for like $50. A good performance will sound good on any microphone. Investing in a large diaphragm condenser is kind of unnecessary unless you’re trying to record yourself often, but it will produce some exceptional recordings. If you’re looking for a mic that sounds clear that you’ll use often, I personally use the KSM8 for live shows and studio work. It’s great at capturing your voice without coloring it (if that’s what you want). But again, if you perform well a cheap SM58 is really all you need.

DPA 4099 P (for piano) \*2 pcs, under the hood of the piano, cabling from the rear side of the piano, carefully done by black velcro. Preamps - portable ZOOM H4/H6 hiding beneath the foot of piano. Or, 2\* Sennheiser plug-on radio system. OR, Shure SM-91 Beta for piano, under the hood, or even on the floor under the piano. Maybe 2\* Shure SM-91 Betas on the edge of the scene, flat surface required. Cabling and mics will not be visible from camera. Additionally, a stereo set of SDC' like Shure SM 81, Audix ADX51, Oktava MK-012-2, Neumann KM 184, on a high boom/ light stand in a hall, where viewers sit rows. Opera singers have strong vocals, 120-130 dB of pressure. Often, they moving heads, swinging backwards and forwards around their position. So, close miking is not necessary and even could lead to problems. Piano and its level is what you need to be concerned. So 1 (2) mics for piano, 2 mics for AB in a hall is what you need.