[MU4 Issue] Real time (metronome) mode: problems with note entry

[rgreen5]

Describe the bug

This is best illustrated by practical examples:

1. Open a blank piano score. Select a start point. Use the virtual piano keyboard (P).
2. Select real-time (metronome) mode and go into note input mode.
3. Select a duration of an eighth note (4).
4. Click on a virtual piano key. Count three clicks and release.
5. Repeat with an attached MIDI keyboard

Problem 1:

At the start, two notes are produced to a single metronome click.

Expected behaviour

The first note should appear at the same time as the first met click, the second note in time with the second met click, and so on.

Problem 2

When the key is released there is an extra note, as if there had been 4 clicks (when in reality there have been only 3). This extra note persists until the hover focus is brought back over the score from the virtual piano keyboard or MIDI keyboard, when it disappears.

Expected behaviour

There should be no extra note in the frst place.

Problem 3

1. Enter real-time (metronome) note input mode.
2. Select a duration of a quarter note (5)
3. Enter 3 tied quarter notes.
4. Enter 6 for a half note duration
5. Enter three tied half notes.

RESULT: A note of duration equal to 5 beats is entered.

Expected behaviour

A note of duration equal to 6 beats should be entered.

[lgvr123]

ASIS, this metronome mode is unusable: Huge latency, Impossible to set the time between clicks higher than 999ms, lack of accuracy.

Tested by MU4.1.1, Windows10, MIDI Keyboard connected through a CME U2MIDI interface.