Playing Kontakt in Dorico may not work with libraries that function as self-plays, i.e. the plugin has its own player and/or sequencer (NI Session Guitarist, NI Session Horns, etc.). This happens if the “Ext” button is pressed in Kontakt (host synchronization mode is enabled). Of course, in this case, Kontakt doesn’t know how fast to play, so it is silent. However, it may seem strange that the MIDI note signal is transmitted and the keys on the Kontakt keyboard are pressed. The problem can also occur in other VSTi plug-ins for self-playing: Toontrack EZkeys, EZbass, Ample Sound Guitars, and so on, if such plug-ins have the host synchronization mode set. In such situations, the cause of incorrect playback is a defective Dorico engine, which is not able to transmit tempo control signals to plug-ins. At first I thought that the reason lies in the type of VST2 plug-ins, which include Kontakt, EZkeys, etc., but I did some tests and found out that, for example, HALion (VST3) can’t change its playback according to the Dorico tempo either. As a conclusion: Dorico does not transmit data about the tempo of the song to the plugins (neither in VST2 nor VST3). Perhaps this is the company’s policy, or maybe the developers ’ flaw?.. I don’t know. Let Daniel answer this question.
However, it would be very great if you could connect a VSTi plug-in self-playing to a chord track, for example, NI Session Guitaris Strummed or EZbass, and much more. More creative searches and wins will open up! Many composers and arrangers would welcome this opportunity with great joy! And Dorico will add a new competitive advantage to its piggy Bank.