Grand Piano: use two cardioid large-diaphragm microphones placed approximately 8 to 16 inches (20 to 40 cm) above the strings. Direct one mic at the treble range and the other at the bass range. Align both microphones with a point about 6 inches (15 cm) behind the dampers. Alternatively, you can mic the bass range from the rear end of the grand for a rounder bass sound.
Upright Piano: mic the upright piano in the same way as the grand. If the front cover is closed, let the mics look into the instrument from above. Removing the front cover provides a more airy sound.
