From Xtant Audio:
The Total Composure orchestra (TCO) is a full orchestral sample library created using only samples that are in the public domain. Samples are gathered from various locations and brought to one place where they can be used together. There are over 1500 samples in this library totalling more than 1.5 GB but we have used Kontakt's lossless compression to crunch the size to less than 500mb. Most of the instruments only contain one set of samples per articulation, and some only have one recorded dynamic layer. We have overcome these issues using a variety of physical modelling techniques that enhance the audio material. Using dynamic filters and intelligent repetition scripting we have removed the limitation of single dynamic recordings and solitary sample sets.