Salamander Grand Piano V3 by Alexander Holm.
Source: https://github.com/sfzinstruments/SalamanderGrandPiano
License: Creative Commons Attribution 3.0 Unported
License URL: https://creativecommons.org/licenses/by/3.0/
Changes: selected moderate-velocity samples, measured and tuned to A=440, resampled to mono 22050 Hz, timed to the vocal melodies and exported as MP3 practice audio. No endorsement is implied.