The Jamstik is compatible with a wide range of apps and programs. 3rd-party apps such as SampleTank, Launchkey and some DAWs (Digital audio workstations) may require a Single-Channel MIDI input.
If the Jamstik is NOT in "Single-Channel Mode", it may seem that it is malfunctioning or playing wrong notes. Some strings may not sound at all. There is a simple solution for this.
To change to "Single-Channel" from the "Omni-Channel" default, see this article or watch the following video: