Q. Do you have a tutorial?
A. No we don't. However, the C-language source code was released. You can compile it by Visual studio 2012.
Q. Do you have WORLD of Matlab version?
A. Yes, we do. You can download it.
Q. Is there difference in estimation accuracy between C-language and Matlab version?
A. Yes, there is. In Dio, CheapTrick and D4C, the results are the same (around 10^-10), whereas other functions contain the small error. However, the error does not affect the sound quality.
About license of WORLD
Q. Do you have a patent on WORLD
A. No, we don't. You can use it as free software under the modified BSD license.