When playing back a sampled instrument, any noise captured in the recording can build up when multiple samples are played simultaneously. To help with this, noise reduction of the individual samples can be very important to creating a playable instrument. Whilst it is not essential to supply your Pianobook samples with a noise reduced option, having one available will make it more usable by others. Don’t worry if you don’t have the software to noise reduce, this can be done later using you “wild track”. You may want to ask people from the community to help out.
Christian walks through noise reduction in the following video:
Note: It is important to provide the both the original samples and the noise reduced samples, and keep the files named the same to allow for each sample swapping between each version.