Here’s a very cool collection of acoustic and electric guitars and basses plus a banjo thrown in as well. The collection was done by Flame Studios. While it does come in SoundFont format, I had issues bringing these directly into the Kronos, so I used the Giga version and did the conversion using Translator 6.0. I had to break the collection in two with all the electric guitars in the first collection, while the acoustics, basses, and banjo fills out the second.

Licensing:

These samples are released under the GNU GPL License. The source code being the sf2 files (of which contain the audio samples and settings). The samples and settings can be accessed within Viena and Translator Free on windows or Swami on linux. This license means that you can do what you like with them but if you create any samples from them or improve on them then you have to use the same license in your projects. This way it keeps it open source (and therefore free). This license is only concerned with the source code. Any music you create with them is nothing to do with me (i.e. you take all the royalties and use whatever license you like).