if it is a large venue and there is no sound gathering, a microphone is usually added. A very small wheat can be clipped on the piano, and there are also relatively rustic ones. The organizer can only point at Mike without a microphone. You can only add wheat to the piano. What you said, at least a wheat for the piano and a wheat for the small lift, is of course on the stage. No matter how big your stage is, don't mention it, piano it, and stay far away. Two people need to be next to each other in order to communicate. It's basically just a corner of the stage. Mike has too many brands. Just use dynamic wheat. Your scene is estimated to be crowded and noisy, so just don't buy a condenser microphone. The capacitor is too sensitive, the radio is badly received, and the noise has to be taken in.