Due to the characteristics of Bluetooth wireless technology, the sound is delayed compared to the cable connection. Depending on the communication environment and the performance of the smart device, the sound may be delayed or distorted in the lesson function of application.
In this case, please check how to use the lesson (3.6 Useful Playback Methods for Practice) and MIDI playback quality (2.4 Adjusting Bluetooth MIDI Playback Quality) in the Chordana Play manual .