Topmusicanswers
Keep your attention on the beat, counting the beat inside, and perform the trill with indirect attention. This requires that your have practiced the mechanics of the trill enough that you can do it with only a fraction of your total attention.
How do you keep music playing while counting?
Over time, counting will become something you hardly think about. Make a point of counting when you are listening to music. If you find it difficult to count while listening, then you're going to have even more trouble counting and playing at the same time. So count while listening until you can do that with no effort.
How many notes is a trill?
A trill is the alternation of two notes that are either a half step or a whole step apart. It consists of the principal note, which is the lower note, and the auxiliary note, which is the higher note.
