Three adjacent notes are sounding twice for every one time the are struck
The middle C#, C and the B just below them give two quick note sounds when struck. This is true whether they are in a piece or clicked on with the mouse. The repetitions are about as quick as 1/8 notes. If it is a quarter note, though, there is one quick (1/8) note sound, then the note sounds again to fill the rest of its duration: So, it makes a quick note and a longer note. If the written note looks like middle C (or the other two), but the treble clef has the "8" over it, it does not do this. But if I drag that C down an octave, it does it. This has been only with the violin. I checked two other instruments and it did not do it. They were viola and flute. I checked four other pieces and it did it in all of them (they were all violin) and changed a fifth from recorder to violin and then it did it, too. BUT, when I wrote up a new test piece in violin, it didn't do it.