The Fazioli Ebony Concert Grand (complete) contains 3 microphone perspectives with up to 14 velocity layers, release samples, true staccato, picked strings, piano effects and performance sounds.
As with all imperfect samples, natural performance elements are included, such as the sounds of the fingers touching the keys. No robots or sampling machines were used here. Provided at full 24-bit audio fidelity, this grand piano sample library totals 30GB of data (12GB download), and over 8000 unique samples.
This is essentially three distinct grand pianos in one package. Microphone perspective 1 was recorded 2 inches from the sound-board, for an organic warm sound, perspective 2 was recorded directly inside the instrument, for a clean sound, and perspective 3 was recorded 2 metres away from the piano for a "wet" room sound. Treat this sampled piano library like a live instrument; mix the perspectives like you would a live recording.
This piano library uses direct-from-disc technology, which means it has a RAM footprint of only about 350MB.
Here at imperfect samples it is believed that the key to getting a decent sample library is down to the sound, not specifications on paper. Sound is an ineffable quality that that doesn't come down to quantifiable methods such as number of velocity layers. However, if 14 velocity layers in each perspective isn't enough to satisfy your appetite, an (extreme) package is available, with even more velocity layers and mic perspectives.