These use the latest version of Maize Sampler and should be compatible with both VST 2 & 3. They also use the new ADSR controls from Maize and should work better.
NST Vocals Win 64 Win 32 Mac VST Mac AU
These are 30 acoustic choral 'patches' in 5 instruments. The are arranged by range, Full, High, Mid and Low.
NST Pianos Win 64 Win 32 Mac VST Mac AU
These are 5 Acoustic Keyboards which are pianolike at any rate. They are called up from a single instrument sort of like a mini-romper.
License: The dataset is made available by Google Inc. under a Creative Commons Attribution 4.0 International (CC BY 4.0) license.
Paper:
Jesse Engel, Cinjon Resnick, Adam Roberts, Sander Dieleman, Douglas Eck,
Karen Simonyan, and Mohammad Norouzi. "Neural Audio Synthesis of Musical Notes
with WaveNet Autoencoders." 2017.