My first post in this great forumI could not get Virtins to use bit-exact input and output at the same time.
Multi-Instrument used to have an occasional dropout issue with some ASIO drivers when the ASIO buffer size is small and simultaneous input and output is running. It has been fixed since Version 3.8 Build 3 (Released on Aug 31, 2018). The 21-day trial period will be reset by a new version. The latest version is V3.8.5.2.
"bit-perfect" signal generation can be done through the bit-perfect library. Details can be found in Section 4.3.1.9.2 of the software manual which can be accessed through [Help]>[Software Manual], or simply press F1. It can be used to generate bit-perfect signals or wave files such as the J-Test signal.